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    HCG Efficacy: Should We Measure 17-OH-progesterone to Titrate HCG Dose?

    IMO, the back-filling would be subject to new patient who is deficient (back-filling helps speed recovery), or, for longer term TRT subject who might be slowly deficient. Pregnenolone is not a reliable marker. Progesterone is slightly more $$. 170H-Progesterone sits atop the Cortisol cascade...
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    HCG Efficacy: Should We Measure 17-OH-progesterone to Titrate HCG Dose?

    So, the StAR expression is stimulated by LH (hCG mimics), which starts the p450scc enzyme to produce Pregnenolone from cholesterol. Then Pregnenolone converts to Progesterone (3B-HSD via StAR) or to 17OH-Pregnenolone (17,20 lyase via StAR). These two can convert to 17OH-Progesterone (by same...
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    Carnitine Analogs

    All four naturally occur in the body, but will not necessarily convert if there is a minimum present. Adding them could be of benefit. I'm familiar with L-Carnitine and NAC, don't know about the other two. "Each carnitine analog has its own unique chemical structure. Your body will therefore...
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    Carnitine Analogs

    I use Beverly International proteins, vit/min pak, and aminos. They market this product for those over 35: http://beverlyinternational.com/products/Quadracarn.html It has 4 analogs: l-carnitine, n-acetyl-l-carnitine, propionyl-l-carnitine and l-carnitine l-tartrate Would this still be a good...
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    New TRT @ 55 yrs

    Had my consult today: 80 mg T 2x/week (ex. T & Fr) 500 IU hCG 2x/week (ex. M & Th) 25 mg DHEA 2x/day Blood re-test at 8 weeks.
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    New TRT @ 55 yrs

    I guess SBHG and FSH were never part of the panel - OK. Maybe not worth the cost. With TT, FT, and E2 so low, it' obvious what the plan is. SBHG is probably low as well. The starting point is probably not all that significant in the overall picture, and reducing the upfront cost is always...
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    New TRT @ 55 yrs

    Thanks for your replies, That was the sleep Dr., not my PCP. He should know better, though. I went there thinking bad REM sleep would cause Low T (now I know it is the reverse). I don't have much hope with the Endo. I don't know if I'll keep the appointment or not. Yeah, it doesn't matter at...
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    New TRT @ 55 yrs

    55 years old, lift 4x week (45-60 min), eat fairly clean, no other health concerns, no OTC meds or meds of any kind. 6'4", 235 lbs. Never used steroids. Supplement with protein, multi vit/min, creatine, beta-alanine, and aminos. I've been feeling like somebody dropped the boat anchor (just...
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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