Metformin and PSA Levels: Does it Make a Difference?

Metformin, the first-line antihyperglycemic, has been touted as something of a wonder drug with strong, anti-aging properties. A recent study conducted in Toronto was undertaken to determine if Metformin administration had any impact on PSA levels. Over 300 men, all free of prostate cancer, were recruited between 2004 and 2013; all had type 2 diabetes.



[style=font-style:italic;]"Mean PSA levels were 30% lower among users of Metformin compared to nonusers. PSA levels of intermediate‐ and high‐dose metformin users were 32% lower, respectively, compared to the low‐dose group."
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The study, while a strong "win" for Metformin has several limitations.





    Only cancer-free men were included in the study.

    A very small number, three percent, were of African descent.

    A wider study with greater PSA thresholds might yield different results.




As is often the case, the directors of the study call for further testing.



The text of the article reporting these findings, in the November 2016 issue of "The Prostate" is below.



Abstract
 

hCG Mixing Calculator

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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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