How do you know if you have low testosterone ?

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Nelson Vergel

Founder, ExcelMale.com
Do you have low blood levels of testosterone?


Men with low blood levels of testosterone (men with hypogonadism) may experience low sex drive, erectile dysfunction, low mood, fatigue and other very concerning symptoms that can dramatically impact their lives and that of people around them. There are several questionnaires developed in the medical community to assess who would be a good candidate for testosterone blood testing.

An important observation is that low testosterone symptoms can also be caused by medications, sleep apnea, depression, illness, and other health issues that may have nothing to do with hormone blood levels, so it is important not to assume one has low testosterone just because these symptoms are present. A blood test is a good way to find out if indeed someone has low testosterone blood levels.
The following questionnaire is one the most commonly used in the testosterone replacement field.

ADAM questionnaire about symptoms of low testosterone
(Androgen Deficiency in the Aging Male)

This basic questionnaire can be very useful for men to describe the kind and severity of their low testosterone symptoms.

1. Do you have a decrease in libido (sex drive)? Yes No
2. Do you have a lack of energy? Yes No
3. Do you have a decrease in strength and/or endurance? Yes No
4. Have you lost height? Yes No
5. Have you noticed a decreased "enjoyment of life" Yes No
6. Are you sad and/or grumpy? Yes No
7. Are your erections less strong? Yes No
8. Have you noticed a recent deterioration in your ability to play sports? Yes No
9. Are you falling asleep after dinner? Yes No
10. Has there been a recent deterioration in your work performance? Yes No

If you answered Yes to number 1 or 7 or if you answer Yes to more than 3 questions, you may have low Testosterone.
 

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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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