Great Article on Caffeine and When to use

References from the article:

Modified-release hydrocortisone to provide circadian cortisol profiles

Caffeine alters circadian rhythms and expression of disease and metabolic markers

International society of sports nutrition position stand: caffeine and exercise performance

Caffeine Timing Improves Lower-Body Muscular Performance: A Randomized Trial

Effects of caffeine on neuromuscular fatigue and performance during high-intensity cycling exercise in moderate hypoxia

Caffeine Increases Muscle Performance During a Bench Press Training Session

Light-to-moderate coffee drinking associated with health benefits

Time course of tolerance to adverse effects associated with the ingestion of a moderate dose of caffeine

Can I Have My Coffee and Drink It? A Systematic Review and Meta-analysis to Determine Whether Habitual Caffeine

Caffeine Effects on Sleep Taken 0, 3, or 6 Hours before Going to Bed

Coffee, caffeine, and sleep: A systematic review of epidemiological studies and randomized controlled trials

Coffee with co-workers: role of caffeine on evaluations of the self and others in group settings

Sweetened beverage consumption and risk of coronary heart disease in women


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hCG Mixing Calculator

HCG Mixing Protocol Calculator

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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