Sleep Quality

How Your Circadian Clock Genes Affect Your Testosterone- Deep Dive
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This Beyond Testosterone podcast episode comes from an academic review article from the Asian Journal of Andrology, published in September-October 2025. This article, titled "Regulation of testosterone synthesis by circadian clock genes and its...
New research on Taurine improving HPTA Hormone Axis
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Came across this video (linked below) showing a new study outlining that Taurine supplementation might increase Gnrh, FSH, LH and general testicular health. - relevant commentary from @24:25 Thoughts on adding 1g/day to the supp stack? The...
Pregnenolone in Men: Help determining proper dosage and frequency
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Hi all, I've been experimenting with pregnenolone for over a year now, with varied success. I seem to get benefits at 100mg (such as higher libido, more pronounced nighttime erections and better sleep); however, I don't get these results...

Best Sleep Supplements

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Please share which sleep supplements work best for you.

Men: What has been your experience with progesterone?

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Sorry, I know there are a ton of other threads on progesterone, but seems like a lot of them get derailed and you have to filter through like 12 pages of comments and studies people posted. I just want to know straight up, what has been your...
Sleep Apnea: Why Does Testosterone Make it Worse?
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As part of an unsuccessful recent experiment with my protocol (nandrolone added to testosterone), my sleep apnea appears to have gotten noticeably worse over a very short period of time. I haven't been treating my OSA since it's typically so mild...
Sleep Supplements Used by Chronic Fatigue Patients: Results from Survey
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Good sleep goes a long way to getting better and sometimes supplements and herbs can help. Check out what FM and ME/CFS patients said about supplements, herbs and over the counter drugs that helped them sleep. (Add your suggestions in the comment...

Safety and efficacy of melatonin for sleep disorders?

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What do we really know about the safety and efficacy of melatonin for sleep disorders? (2021) David J. Kennaway ABSTRACT Melatonin is a hormonal product of the pineal gland, a fact that is often forgotten. Instead, it is promoted as a dietary...
Diagnosis and Management of Obstructive Sleep Apnea
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Diagnosis and Management of Obstructive Sleep Apnea A Review (2020) Daniel J. Gottlieb, MD, MPH; Naresh M. Punjabi, MD, PhD IMPORTANCE Obstructive sleep apnea (OSA) affects 17% of women and 34% of men in the US and has a similar prevalence in...
TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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