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My wife has donated 18 gallons of blood. She is 73 years old, plays tennis four times a week, and is one of the healthiest people I know. I have donated almost 10 gallons. Donating blood generally improves the health of men and postmenopausal women, and helps people that need blood or blood products.

[QUOTE="George9, post: 242089, member: 44361"] My wife has donated 18 gallons of blood. She is 73 years old, plays tennis four times a week, and is one of the healthiest people I know. I have donated almost 10 gallons. Donating blood generally improves the health of men and postmenopausal women, and helps people that need blood or blood products. [/QUOTE]

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TRT Hormone Predictor Widget

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