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  1. 4

    Can our Body Increase its own Production of Testosterone?

    A lot depends on the reason for your low T. If you are young to middleaged, overweight and have relatively high body fat, losing the fat with a healthy diet and appropriate amounts and intensity levels of exercise is likely to help some. Plus it's good for you anyways. On the pharmaceutical...
  2. 4

    What needle length for IM TRT? Thinking of changing from subQ to IM to feel better

    It is possible that the symptoms you are experiencing are not related to your testosterone levels. Having T levels optimized is just one aspect of being healthy and feeling good. I would recommend talking to your doctor and exploring other possible reasons as to why you are not feeling great...
  3. 4

    Sent blood test, now what?

    Blood spot testing is all over the place for accuracy. I would not trust it, especially with respect to Estradiol. I found this article A comparison of blood spot versus plasma analysis of gonadotropin and ovarian steroid hormone levels in reproductive-age women where the owner of ZRT labs...
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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