Nelson Vergel
Founder, ExcelMale.com
Curated By Nelson Vergel | ExcelMale.com | Updated May 2026
If you've been on testosterone replacement therapy for a while and still feel flat in mood, foggy in the morning, or less mentally sharp than expected, pregnenolone may be the missing piece in your protocol. Most TRT prescribers focus exclusively on testosterone, estradiol, and hematocrit. But TRT suppresses the body's natural production of several upstream hormones, and pregnenolone sits at the very top of that cascade.
Pregnenolone is often called the "mother hormone" because it is the direct precursor to nearly every steroid hormone your body makes, including progesterone, DHEA, cortisol, and eventually testosterone itself. It also converts into powerful neurosteroids that regulate mood, sleep, and cognition. When TRT shuts down the LH signal to your testes, the Leydig cells lose their primary stimulus for steroid synthesis, and pregnenolone production drops along with everything downstream.
In our ExcelMale community, pregnenolone has been one of the most discussed add-on supplements for years, with debates around dosing, timing, tolerance, and when it's actually warranted. This article brings together what the clinical research shows and what thousands of men in our forum have experienced firsthand.
The adrenal glands also produce pregnenolone independently, so levels do not fall to zero on TRT. However, some sources estimate that testicular suppression can reduce circulating pregnenolone by as much as 80-90% in men who are not using HCG alongside their protocol. This is why many TRT prescribers recommend HCG as a way to maintain the LH stimulus and keep the entire steroidogenic pathway functional. For men who cannot access or afford HCG, exogenous pregnenolone supplementation is one alternative approach.
Research published in PMC (2023) on shift workers confirmed that lower pregnenolone serum levels correlate directly with lower total testosterone, reinforcing the upstream role of this hormone in the steroidogenic pathway. If the foundational material is insufficient, the downstream hormone output suffers.
Pregnenolone itself has a short serum half-life of roughly 3-4 hours, which is why some men see effects that wear off by afternoon even with a morning dose. Its sulfate derivative, pregnenolone sulfate, has a longer half-life of 10-12 hours. The neurosteroid allopregnanolone is a potent positive modulator of GABA-A receptors, which explains the calming, anti-anxiety, and sleep-supporting effects many men report when pregnenolone supplementation is working well.
A clinical trial published in Neuropsychopharmacology found that after 8 weeks of pregnenolone treatment, serum pregnenolone levels rose approximately fourfold, pregnenolone sulfate tripled, and allopregnanolone increased fivefold. The same study found that increases in allopregnanolone directly predicted improvements in cognitive performance, adding scientific weight to the cognitive benefits many TRT users report anecdotally.
Several members in our community have described pregnenolone as providing a "smoothing" effect on the emotional volatility that can accompany TRT, particularly at higher testosterone doses. The mechanism is plausible: more pregnenolone means more allopregnanolone, which means more GABA-A activity, which means a calmer nervous system.
In the clinical trials targeting cognitive symptoms in schizophrenia, improvements in a composite cognitive battery were significantly correlated with increases in both serum pregnenolone and allopregnanolone. While schizophrenia patients are not a direct parallel to TRT users, the neurobiological mechanisms are shared, and the "brain fog" that some men report on TRT may partially reflect neurosteroid insufficiency.
The theory, which is mechanistically plausible, is that higher testosterone doses suppress pregnenolone and DHEA to a greater degree. When you replace what TRT is depleting, the hormonal environment becomes better balanced, and the body tolerates the exogenous testosterone more comfortably. One member reported going from a resting heart rate elevated by 10 beats per minute at 125 mg/week to normalized cardiovascular metrics after adding 100 mg pregnenolone and 50 mg DHEA daily.
That said, practical experience in the ExcelMale community and what limited pharmacokinetic data exists point to some reasonable starting principles.
The solution most experienced community members have landed on is a cycling approach. Instead of dosing daily without breaks, some men dose pregnenolone for 5 days on and 2 days off, or use it 3-4 times per week rather than every day. This appears to preserve receptor sensitivity and maintain the positive effects longer.
Because oral pregnenolone is lipophilic and readily crosses the blood-brain barrier, even the fraction that survives liver metabolism can have meaningful central nervous system effects. Many men prefer to take it in the morning with food. Sublingual or transdermal formulations may offer better bioavailability for some individuals, though standardized data on these routes in TRT populations is limited.
The most common issue is downstream progesterone accumulation. A portion of pregnenolone will always convert to progesterone, and at higher doses or with daily use, progesterone can build up to levels that cause fatigue, brain fog, emotional blunting, and mood instability. This is the most frequent reason men stop using it.
If you experience side effects, the appropriate response is to reduce the dose, increase the gap between doses, or discontinue entirely and assess how you feel after a washout period of 1-2 weeks. Never increase the dose if side effects are present, as this tends to worsen the problem rather than resolve it.
Dr. Mark Gordon, one of the most vocal proponents of pregnenolone in hormone medicine, recommends targeting serum pregnenolone levels of approximately 110 pg/mL for optimal neurological and hormonal function. Most conventional lab reference ranges for pregnenolone in men run from roughly 10 to 200 pg/mL, but that range is wide enough to be clinically uninformative. A level of 18 or 43 pg/mL in a man who feels unwell on TRT despite otherwise normal labs is worth addressing.
DiscountedLabs.com offers pregnenolone testing without a doctor's order, making it accessible for men who want to check their baseline before beginning supplementation. Retesting 6-8 weeks after starting supplementation gives you measurable data on whether your chosen dose is producing meaningful changes in serum levels.
Detailed community discussion of dosing strategies, half-life, progesterone accumulation, and receptor downregulation, with input from Nelson Vergel.
Pregnenolone Makes High-Dose Testosterone Tolerable
A foundational thread exploring how pregnenolone and DHEA supplementation helped men tolerate testosterone levels above 1,500 ng/dL, including cardiovascular improvement.
Pregnenolone Makes High-Dose Testosterone Tolerable - Page 6
Continued discussion with detailed member reports on protocol adjustments, dosing combinations, and specific outcomes at various testosterone levels.
TRT and Pregnenolone: Forum Overview and Opinion
An honest assessment of pregnenolone's role as a TRT add-on, including a candid discussion of the high discontinuation rate and comparisons to direct progesterone supplementation.
Pregnenolone and Progesterone for Men: Pharmacokinetics and Studies
Nelson Vergel's research compilation covering oral bioavailability, conversion pathways, and published pharmacokinetic data including clinical trial results.
Optimal Pregnenolone Numbers: What Blood Levels Should You Target?
Discussion of target serum pregnenolone levels, including Dr. Mark Gordon's recommendation of approximately 110 pg/mL and experiences from men who supplemented based on documented deficiency.
Pregnenolone Help: Community Experiences and Protocol Adjustments
Practical troubleshooting from community members including how to manage negative effects, adjust timing, and evaluate whether pregnenolone is right for your protocol.
Pregnenolone Dose: Starting Points and Titration Strategies
A broad thread covering dose titration, frequency strategies, and the experiences of men working up from low starting doses.
2. Marx CE, et al. Proof-of-Concept Randomized Controlled Trial of Pregnenolone in Schizophrenia. Psychopharmacology, 2014. https://doi.org/10.1007/s00213-014-3673-4
3. Darnaudery M, et al. The Neurosteroid Pregnenolone Sulfate Increases Hippocampal Acetylcholine and Spatial Memory in Rats. Journal of Neurochemistry, 2002. Precursors of mental health problems for low birth weight children: the salience of family environment during the first year of life - PubMed
4. Brinton RD. Neurosteroids as Regenerative Agents in the Brain: Therapeutic Implications. Nature Reviews Endocrinology, 2013. Neurosteroids as regenerative agents in the brain: therapeutic implications - Nature Reviews Endocrinology
5. Biagini G, et al. Alterations in Pregnenolone and Testosterone Levels in Male Shift Workers. International Journal of Molecular Sciences, 2023. Alterations in Pregnenolone and Testosterone Levels in Male Shift Workers - PMC
6. Mellon SH, Griffin LD. Neurosteroids: Biochemistry and Clinical Significance. Trends in Endocrinology and Metabolism, 2002. New clues about vitamin D functions in the nervous system - PubMed
7. Netter A, et al. Effect of Zinc Administration on Plasma Testosterone, Dihydrotestosterone and Sperm Count. Archives of Andrology, 1981. Included as reference for steroidogenic pathway context.
8. Majewska MD. Neurosteroids: Endogenous Bimodal Modulators of the GABA-A Receptor. Mechanism of Action and Physiological Significance. Progress in Neurobiology, 1992. Interferon treatment reduced adherence, invasiveness and intracellular multiplication of Shigella flexneri in coxsackie B1 virus-infected cells - PubMed
9. Park Y, et al. Dehydroepiandrosterone Antagonizes Pain Stress-Induced Suppression of Testosterone Production in Male Rats. PLOS ONE, 2018. Dehydroepiandrosterone Antagonizes Pain Stress-Induced Suppression of Testosterone Production in Male Rats - PMC
10. Baulieu EE. Neurosteroids: A New Function in the Brain. Biology of the Cell, 1991. Measurement of free form of insulin-like growth factor I in human plasma - PubMed
Start with lab testing. If your pregnenolone is below 50 pg/mL on TRT, supplementation is clearly warranted. Start at 50 mg with food, assess over 2-3 weeks, and consider pairing with 25 mg of DHEA. Avoid daily high-dose use for extended periods. Cycle your dosing. And if you feel worse after adding it, come off and reassess rather than pushing through.
The ExcelMale community has been exploring this compound for years, and the collective wisdom in our forum threads reflects both the genuine potential and the real limitations of pregnenolone in men's hormone optimization. Use those threads as a resource alongside your own labs and your prescribing clinician's guidance.
Medical Disclaimer
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting or modifying any hormone therapy or medical treatment.
About ExcelMale
ExcelMale.com is one of the most active and expert-moderated men's health forums on the internet, with more than 24,000 members and over 20 years of community knowledge. Founded by Nelson Vergel, the forum covers testosterone replacement therapy, peptide therapy, sexual health, blood work interpretation, and hormone optimization in depth. Nelson is the author of Testosterone: A Man's Guide and Beyond Testosterone, and has 30+ years of personal experience navigating hormone health. Visit ExcelMale.com to join the conversation.
If you've been on testosterone replacement therapy for a while and still feel flat in mood, foggy in the morning, or less mentally sharp than expected, pregnenolone may be the missing piece in your protocol. Most TRT prescribers focus exclusively on testosterone, estradiol, and hematocrit. But TRT suppresses the body's natural production of several upstream hormones, and pregnenolone sits at the very top of that cascade.
Pregnenolone is often called the "mother hormone" because it is the direct precursor to nearly every steroid hormone your body makes, including progesterone, DHEA, cortisol, and eventually testosterone itself. It also converts into powerful neurosteroids that regulate mood, sleep, and cognition. When TRT shuts down the LH signal to your testes, the Leydig cells lose their primary stimulus for steroid synthesis, and pregnenolone production drops along with everything downstream.
In our ExcelMale community, pregnenolone has been one of the most discussed add-on supplements for years, with debates around dosing, timing, tolerance, and when it's actually warranted. This article brings together what the clinical research shows and what thousands of men in our forum have experienced firsthand.
Key Takeaways • TRT suppresses LH, which reduces testicular pregnenolone output. Levels can fall 80-90% in some men. • Pregnenolone converts into progesterone, DHEA, allopregnanolone, and pregnenolone sulfate, each serving distinct brain and body functions. • Most men on TRT who respond well to pregnenolone use 50-100 mg daily, often with 25-50 mg of DHEA. • Pregnenolone follows a U-shaped response curve: too little produces no benefit, and too much can cause tolerance, brain fog, or mood issues from progesterone buildup. • Lab testing pregnenolone before supplementing and targeting serum levels in the range of 100-150 pg/mL is a reasonable starting approach. • Cycling pregnenolone rather than dosing daily may help preserve receptor sensitivity. • Not everyone responds positively. Some practitioners estimate that only 5-10% of men find it meaningfully beneficial. |
Why Does TRT Lower Pregnenolone in Men?
When you inject testosterone, your pituitary gland detects the elevated androgen levels and dramatically reduces its output of luteinizing hormone (LH). LH is the signal that tells your Leydig cells to manufacture steroid hormones, starting with the conversion of cholesterol into pregnenolone. Without that signal, testicular steroidogenesis slows significantly.The adrenal glands also produce pregnenolone independently, so levels do not fall to zero on TRT. However, some sources estimate that testicular suppression can reduce circulating pregnenolone by as much as 80-90% in men who are not using HCG alongside their protocol. This is why many TRT prescribers recommend HCG as a way to maintain the LH stimulus and keep the entire steroidogenic pathway functional. For men who cannot access or afford HCG, exogenous pregnenolone supplementation is one alternative approach.
Research published in PMC (2023) on shift workers confirmed that lower pregnenolone serum levels correlate directly with lower total testosterone, reinforcing the upstream role of this hormone in the steroidogenic pathway. If the foundational material is insufficient, the downstream hormone output suffers.
What Does Pregnenolone Convert Into, and Why Does That Matter?
Pregnenolone sits at the top of the steroid hormone tree, which means its metabolic fate is complex and highly individualized. Understanding the downstream pathways helps explain both the potential benefits and the potential problems with supplementation.Metabolite | Primary Function | Relevance to TRT Men |
Progesterone | Sleep quality, estrogen balance | Useful in moderation; excess causes fatigue and brain fog |
DHEA | Energy, libido, adrenal reserve | Often low on TRT; supports mood and testosterone conversion |
Allopregnanolone | GABA-A receptor modulation, anxiety reduction | Calming neurosteroid; improves sleep and reduces anxiety |
Pregnenolone sulfate | NMDA receptor modulation, memory enhancement | Cognitive benefits; longer half-life than parent molecule |
Cortisol | Stress response, inflammation | Excess can suppress testosterone and impair recovery |
Pregnenolone itself has a short serum half-life of roughly 3-4 hours, which is why some men see effects that wear off by afternoon even with a morning dose. Its sulfate derivative, pregnenolone sulfate, has a longer half-life of 10-12 hours. The neurosteroid allopregnanolone is a potent positive modulator of GABA-A receptors, which explains the calming, anti-anxiety, and sleep-supporting effects many men report when pregnenolone supplementation is working well.
A clinical trial published in Neuropsychopharmacology found that after 8 weeks of pregnenolone treatment, serum pregnenolone levels rose approximately fourfold, pregnenolone sulfate tripled, and allopregnanolone increased fivefold. The same study found that increases in allopregnanolone directly predicted improvements in cognitive performance, adding scientific weight to the cognitive benefits many TRT users report anecdotally.
What Are the Reported Benefits of Pregnenolone for Men on TRT?
The benefits of pregnenolone supplementation in men on TRT fall into two broad categories: neurosteroid effects (mood, cognition, sleep) and upstream hormonal support (DHEA replenishment, downstream androgen support). These are not guaranteed outcomes for every man, but they are consistent themes across both clinical research and community reports.Does Pregnenolone Help with Mood and Anxiety on TRT?
One of the most commonly reported benefits in the ExcelMale community is an improvement in mood stability and a reduction in anxiety or irritability. This tracks with what we know about allopregnanolone's role as a GABA-A modulator. When allopregnanolone is low, the inhibitory brake on the nervous system weakens, making stress responses feel disproportionate.Several members in our community have described pregnenolone as providing a "smoothing" effect on the emotional volatility that can accompany TRT, particularly at higher testosterone doses. The mechanism is plausible: more pregnenolone means more allopregnanolone, which means more GABA-A activity, which means a calmer nervous system.
Can Pregnenolone Improve Cognitive Function?
Pregnenolone sulfate, the sulfated form of the hormone, acts as a positive modulator of NMDA receptors in the brain, which are critical for learning and memory consolidation. Animal studies have shown that pregnenolone sulfate infused into hippocampal regions increases acetylcholine release and improves spatial memory performance.In the clinical trials targeting cognitive symptoms in schizophrenia, improvements in a composite cognitive battery were significantly correlated with increases in both serum pregnenolone and allopregnanolone. While schizophrenia patients are not a direct parallel to TRT users, the neurobiological mechanisms are shared, and the "brain fog" that some men report on TRT may partially reflect neurosteroid insufficiency.
Does Pregnenolone Make High Testosterone Doses More Tolerable?
This is one of the most practical and compelling use cases discussed in our community. One thread with nearly 200 replies describes how adding 50-100 mg of pregnenolone combined with 25-50 mg of DHEA allowed men running testosterone levels above 1,500 ng/dL to eliminate side effects including elevated resting heart rate, insomnia, and general nervous system overstimulation.The theory, which is mechanistically plausible, is that higher testosterone doses suppress pregnenolone and DHEA to a greater degree. When you replace what TRT is depleting, the hormonal environment becomes better balanced, and the body tolerates the exogenous testosterone more comfortably. One member reported going from a resting heart rate elevated by 10 beats per minute at 125 mg/week to normalized cardiovascular metrics after adding 100 mg pregnenolone and 50 mg DHEA daily.
What Is the Right Pregnenolone Dose for Men on TRT?
Dosing pregnenolone is genuinely challenging because individual metabolic variation is enormous. The same 100 mg dose will produce very different blood levels and downstream hormone ratios in different men, depending on liver metabolism, adrenal function, and the individual's specific enzyme activity.That said, practical experience in the ExcelMale community and what limited pharmacokinetic data exists point to some reasonable starting principles.
Dose Range | Typical Use Case | Notes |
10-25 mg daily | Maintenance / beginner | Some men find minimal benefit at this level; useful as a starting dose to assess tolerance |
50-100 mg daily | Most common TRT adjunct dose | Most community members who respond well report benefits at this range; typically combined with 25-50 mg DHEA |
100-200 mg daily | Higher-dose protocols | Greater risk of progesterone accumulation and tolerance; cycling is advisable at this level |
400-500 mg daily | Clinical research doses | Used in clinical trials; not practical for TRT optimization; associated with significant downstream hormone shifts |
Why Does the Dosing Follow a U-Shaped Curve?
Pregnenolone modulates GABA-A receptor sensitivity. Because it changes receptor responsiveness rather than simply adding a signal, both too little and too much can produce suboptimal or even negative results. Doses that are too low produce no meaningful effect. Doses that are too high can lead to downregulation of neurosteroid receptor sensitivity, meaning the receptors become less responsive to the calming effects over time. This is likely why many men report that the benefits of daily high-dose pregnenolone begin to diminish within days.The solution most experienced community members have landed on is a cycling approach. Instead of dosing daily without breaks, some men dose pregnenolone for 5 days on and 2 days off, or use it 3-4 times per week rather than every day. This appears to preserve receptor sensitivity and maintain the positive effects longer.
Does Oral Pregnenolone Work Well?
Oral pregnenolone has high first-pass liver metabolism and relatively low bioavailability. Despite this, it still produces measurable increases in serum pregnenolone and its downstream metabolites, as shown in multiple pharmacokinetic studies. A single 175 mg oral dose roughly doubled serum pregnenolone levels over 4-8 hours. A 400 mg dose increased pregnenolone serum levels by approximately 60% and tripled allopregnanolone within 2-3 hours.Because oral pregnenolone is lipophilic and readily crosses the blood-brain barrier, even the fraction that survives liver metabolism can have meaningful central nervous system effects. Many men prefer to take it in the morning with food. Sublingual or transdermal formulations may offer better bioavailability for some individuals, though standardized data on these routes in TRT populations is limited.
What Side Effects Can Pregnenolone Cause in Men?
Pregnenolone has a high discontinuation rate among TRT users. Estimates from practitioners experienced in this area suggest only 5-10% of men who try it continue long-term. Understanding why requires understanding what goes wrong.The most common issue is downstream progesterone accumulation. A portion of pregnenolone will always convert to progesterone, and at higher doses or with daily use, progesterone can build up to levels that cause fatigue, brain fog, emotional blunting, and mood instability. This is the most frequent reason men stop using it.
Common Side Effects to Watch For • Fatigue or excessive sedation (from progesterone accumulation or excess allopregnanolone) • Brain fog or mental blunting • Mood swings or emotional instability • Waning benefits after 1-2 days of continuous use (receptor downregulation) • Headaches, irritability, or anxiety at doses that are too high • Skin issues in some individuals (hormonal shifts affecting sebaceous glands) |
If you experience side effects, the appropriate response is to reduce the dose, increase the gap between doses, or discontinue entirely and assess how you feel after a washout period of 1-2 weeks. Never increase the dose if side effects are present, as this tends to worsen the problem rather than resolve it.
Should You Test Pregnenolone Levels Before Supplementing?
Testing your baseline pregnenolone serum level before adding supplementation is a reasonable and practical step. It tells you whether you actually have a documented deficiency rather than experimenting blindly, and it gives you a reference point to evaluate whether supplementation is achieving its goal.Dr. Mark Gordon, one of the most vocal proponents of pregnenolone in hormone medicine, recommends targeting serum pregnenolone levels of approximately 110 pg/mL for optimal neurological and hormonal function. Most conventional lab reference ranges for pregnenolone in men run from roughly 10 to 200 pg/mL, but that range is wide enough to be clinically uninformative. A level of 18 or 43 pg/mL in a man who feels unwell on TRT despite otherwise normal labs is worth addressing.
DiscountedLabs.com offers pregnenolone testing without a doctor's order, making it accessible for men who want to check their baseline before beginning supplementation. Retesting 6-8 weeks after starting supplementation gives you measurable data on whether your chosen dose is producing meaningful changes in serum levels.
Frequently Asked Questions
Can I take pregnenolone instead of HCG on TRT?
Pregnenolone can partially replace the upstream hormonal support that HCG provides, but not entirely. HCG stimulates LH receptors in the testes, which keeps the entire steroidogenic pathway active, maintains testicular volume, and supports multiple precursor hormones beyond pregnenolone alone. Exogenous pregnenolone replaces one output of that pathway rather than restoring the signaling cascade. If HCG is unavailable or cost-prohibitive, pregnenolone plus DHEA is a reasonable partial substitute, but it is not equivalent.How long does it take to notice effects from pregnenolone?
Some men report effects within the first 1-3 days, particularly on sleep quality or mood. Others notice nothing for 2-3 weeks, especially at lower doses. Because of the short half-life of oral pregnenolone and the complex metabolism involved, it can take several weeks of consistent use to accumulate enough downstream metabolites for a clear subjective effect. If you notice nothing at 50 mg after 3-4 weeks, trying 100 mg is reasonable before concluding you are a non-responder.Does pregnenolone raise testosterone levels?
In men who are already on TRT, this question is largely academic because their testosterone is being supplemented exogenously. In men who are not on TRT, pregnenolone supplementation does not reliably raise testosterone to clinically meaningful levels. The clinical trial using 500 mg daily in schizophrenia patients found no significant increase in serum testosterone from pregnenolone supplementation. Any testosterone-boosting effect would be indirect and modest at physiological doses.Should I take pregnenolone with DHEA?
Many TRT practitioners and experienced community members recommend combining pregnenolone with DHEA because TRT suppresses both. Using them together at typical doses (50-100 mg pregnenolone, 25-50 mg DHEA) may better approximate the upstream hormonal environment that existed before TRT began. DHEA can also buffer some of the downstream progesterone accumulation that comes with pregnenolone supplementation, though this is a balancing act that varies by individual.Is pregnenolone safe long-term?
At doses used in clinical trials (up to 500 mg/day for 8 weeks), pregnenolone has been found to be well tolerated with no serious adverse events reported. At the typical TRT-adjunct range of 50-100 mg, the safety profile is considered low risk. The primary concerns are the downstream hormonal shifts (particularly progesterone) that can develop with continuous high-dose use. Monitoring labs and cycling the dose are the most practical risk-reduction strategies.Related ExcelMale Forum Discussions
Pregnenolone in Men: Help Determining Proper Dosage and FrequencyDetailed community discussion of dosing strategies, half-life, progesterone accumulation, and receptor downregulation, with input from Nelson Vergel.
Pregnenolone Makes High-Dose Testosterone Tolerable
A foundational thread exploring how pregnenolone and DHEA supplementation helped men tolerate testosterone levels above 1,500 ng/dL, including cardiovascular improvement.
Pregnenolone Makes High-Dose Testosterone Tolerable - Page 6
Continued discussion with detailed member reports on protocol adjustments, dosing combinations, and specific outcomes at various testosterone levels.
TRT and Pregnenolone: Forum Overview and Opinion
An honest assessment of pregnenolone's role as a TRT add-on, including a candid discussion of the high discontinuation rate and comparisons to direct progesterone supplementation.
Pregnenolone and Progesterone for Men: Pharmacokinetics and Studies
Nelson Vergel's research compilation covering oral bioavailability, conversion pathways, and published pharmacokinetic data including clinical trial results.
Optimal Pregnenolone Numbers: What Blood Levels Should You Target?
Discussion of target serum pregnenolone levels, including Dr. Mark Gordon's recommendation of approximately 110 pg/mL and experiences from men who supplemented based on documented deficiency.
Pregnenolone Help: Community Experiences and Protocol Adjustments
Practical troubleshooting from community members including how to manage negative effects, adjust timing, and evaluate whether pregnenolone is right for your protocol.
Pregnenolone Dose: Starting Points and Titration Strategies
A broad thread covering dose titration, frequency strategies, and the experiences of men working up from low starting doses.
Key References
1. Marx CE, et al. Proof-of-Concept Trial with the Neurosteroid Pregnenolone Targeting Cognitive and Negative Symptoms in Schizophrenia. Neuropsychopharmacology, 2009. Proof-of-Concept Trial with the Neurosteroid Pregnenolone Targeting Cognitive and Negative Symptoms in Schizophrenia - Neuropsychopharmacology2. Marx CE, et al. Proof-of-Concept Randomized Controlled Trial of Pregnenolone in Schizophrenia. Psychopharmacology, 2014. https://doi.org/10.1007/s00213-014-3673-4
3. Darnaudery M, et al. The Neurosteroid Pregnenolone Sulfate Increases Hippocampal Acetylcholine and Spatial Memory in Rats. Journal of Neurochemistry, 2002. Precursors of mental health problems for low birth weight children: the salience of family environment during the first year of life - PubMed
4. Brinton RD. Neurosteroids as Regenerative Agents in the Brain: Therapeutic Implications. Nature Reviews Endocrinology, 2013. Neurosteroids as regenerative agents in the brain: therapeutic implications - Nature Reviews Endocrinology
5. Biagini G, et al. Alterations in Pregnenolone and Testosterone Levels in Male Shift Workers. International Journal of Molecular Sciences, 2023. Alterations in Pregnenolone and Testosterone Levels in Male Shift Workers - PMC
6. Mellon SH, Griffin LD. Neurosteroids: Biochemistry and Clinical Significance. Trends in Endocrinology and Metabolism, 2002. New clues about vitamin D functions in the nervous system - PubMed
7. Netter A, et al. Effect of Zinc Administration on Plasma Testosterone, Dihydrotestosterone and Sperm Count. Archives of Andrology, 1981. Included as reference for steroidogenic pathway context.
8. Majewska MD. Neurosteroids: Endogenous Bimodal Modulators of the GABA-A Receptor. Mechanism of Action and Physiological Significance. Progress in Neurobiology, 1992. Interferon treatment reduced adherence, invasiveness and intracellular multiplication of Shigella flexneri in coxsackie B1 virus-infected cells - PubMed
9. Park Y, et al. Dehydroepiandrosterone Antagonizes Pain Stress-Induced Suppression of Testosterone Production in Male Rats. PLOS ONE, 2018. Dehydroepiandrosterone Antagonizes Pain Stress-Induced Suppression of Testosterone Production in Male Rats - PMC
10. Baulieu EE. Neurosteroids: A New Function in the Brain. Biology of the Cell, 1991. Measurement of free form of insulin-like growth factor I in human plasma - PubMed
Conclusion
Pregnenolone is not a magic addition to TRT, and it is not right for every man. The high discontinuation rate reflects a real biological reality: the benefits are highly individual, and the margin between helpful and counterproductive is narrower than most supplements. But for men who have documented low levels, who are struggling with mood, cognition, or side effects at higher testosterone doses, or who feel subjectively incomplete despite otherwise optimized labs, pregnenolone is worth a careful, structured trial.Start with lab testing. If your pregnenolone is below 50 pg/mL on TRT, supplementation is clearly warranted. Start at 50 mg with food, assess over 2-3 weeks, and consider pairing with 25 mg of DHEA. Avoid daily high-dose use for extended periods. Cycle your dosing. And if you feel worse after adding it, come off and reassess rather than pushing through.
The ExcelMale community has been exploring this compound for years, and the collective wisdom in our forum threads reflects both the genuine potential and the real limitations of pregnenolone in men's hormone optimization. Use those threads as a resource alongside your own labs and your prescribing clinician's guidance.
Medical Disclaimer
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting or modifying any hormone therapy or medical treatment.
About ExcelMale
ExcelMale.com is one of the most active and expert-moderated men's health forums on the internet, with more than 24,000 members and over 20 years of community knowledge. Founded by Nelson Vergel, the forum covers testosterone replacement therapy, peptide therapy, sexual health, blood work interpretation, and hormone optimization in depth. Nelson is the author of Testosterone: A Man's Guide and Beyond Testosterone, and has 30+ years of personal experience navigating hormone health. Visit ExcelMale.com to join the conversation.
