Introduction Background and significance Hypogonadism, characterized by low testosterone levels, is a significant clinical condition affecting a substantial proportion of the male population, particularly older men. The management of...
The occurence of fractures in an elderly population is a significant concern, so this study looked at the relation between the number of fractures and hormone levels, including testosterone. It found fractures were higher at both low and high...
Poster 149: Testosterone/Estradiol Ratio and Low Libido in Men with Sexual Dysfunction Title TESTOSTERONE: ESTRADIOL RATIO A STEP FORWARD TOWARDS THE UNDERSTANDING OF LOW LIBIDO IN MEN WITH SEXUAL DYSFUNCTION Authors Rodrigo Freddi, Rubens...
As we very well know T s metabolites estradiol and DHT are needed in order to reap full beneficial effects of testosterone. Ts metabolites estradiol and DHT are needed in healthy amounts to experience the full spectrum of testosterones...
Using hCG in Men on Testosterone Replacement Therapy (TRT) – A Clinical Review Introduction Exogenous testosterone replacement therapy (TRT) can profoundly suppress the hypothalamic-pituitary-gonadal (HPG) axis through negative feedback. By...
Thanks to Dr Sun for this diagram. Timeline details (left → right) YearProduct (image above/below the line)Form & delivery 1935-1937No product image—text block below the line: “Testosterone first synthesized” with a bullet list of early...
Again you heard it here first! Nelson's domain the one and only! Very informative webinar on the use of the newer oral TU formulations. Testosterone therapy has long been dominated by injectable and topical formulations, but the landscape...
Testosterone Replacement Therapy (TRT) can be life-changing for many men suffering with low testosterone symptoms. However, there are crucial facts that most men are not told by their physicians before they start TRT. Here are the top facts that...
This scientific paper investigates the effects of smoking cessation on hormonal levels in men, specifically focusing on steroid hormones like testosterone, DHEA, DHEAS, cortisol, and sex hormone-binding globulin (SHBG). The researchers aimed to...
Briefing Document: Hormonal Regulation of Male Sexual Desire, Arousal, and Penile Erection Source Rastrelli, G., Antonio, L., Carrier, S., Isidori, A., & Maggi, M. (2025). The hormonal regulation of men’s sexual desire, arousal, and penile...
Can we do more than prescribe pills to address men’s sexual health complaints? In this episode of the BackTable Urology Podcast, men’s health expert Dr. Mohit Khera from Baylor College of Medicine joins guest host Dr. Amy Pearlman for a deep dive...
Note:HCG mimics LH but it is not LH and it's not picked up by the LH blood test. In fact, it suppresses LH like endogeneous testosterone does. But the amazing thing that the study below found is that HCG can increase sperm production and quality...
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.
