New Testosterone Study FINALLY Explains Why Levels Are Falling
Brad Stanfield
Nov 9, 2025
Mindsip insights from this episode:
Address study selection bias in testosterone decline research
Some studies showing a testosterone decline are questionable because they only tested men who were already referred by a doctor for suspected low testosterone, which doesn't represent the general public.
Prioritize weight loss to enhance testosterone levels
For obese men, weight loss is identified as the first-line intervention to boost testosterone levels, and medications like Tirzepatide can help with this process.
Reassess testosterone levels with newer testing methods
The perceived drop in testosterone levels coincides with a switch to newer testing methods that tend to give lower readings, creating a huge jump in the number of men classified as having low testosterone.
Question the myth of testosterone decline across generations
The widely reported generational decline in testosterone may be an illusion caused by changes in measurement methods over time, not an actual biological trend.
Boost testosterone levels with TMG supplement during exercise
The supplement TMG (betaine) has study evidence showing it can increase testosterone levels, particularly in individuals who are exercising.
Recognize testosterone decline beyond obesity rates
A decline in testosterone was observed even among men with a normal body mass index, suggesting that rising obesity rates do not fully explain the trend.
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