New Testosterone Study FINALLY Explains Why Levels Are Falling
Brad Stanfield
Nov 9, 2025
Episode description
For weekly health research summaries and extra insights, sign up here 👉 https://drstanfield.com/pages/sign-up
💊 Supplements I Take: https://drstanfield.com/pages/my-supplements
💊MicroVitamin+ (Pro) Powder: https://drstanfield.com/products/microvitamin-plus
💊MicroVitamin Standard Capsules: https://drstanfield.com/products/microvitamin
Timestamps:
00:00 The Declining Testosterone Levels
01:44 Possible Causes of Decline
03:26 FINALLY Explained Why Testosterone Levels Fell
06:10 The Flaw in the Israeli Study
07:27 Maintaining Testosterone Levels
08:29 Supplements for Boosting Testosterone
📜 Roadmap - how to look young & feel strong: https://drstanfield.com/pages/roadmap
✔️ Twitter: https://twitter.com/BradStanfieldMD
✔️ Patreon: https://www.patreon.com/bradstanfieldmd
Here are the links to the research papers referenced in the video:
https://pubmed.ncbi.nlm.nih.gov/17062768/
https://pmc.ncbi.nlm.nih.gov/articles/PMC6966696/
https://pmc.ncbi.nlm.nih.gov/articles/PMC10338218/
https://pubmed.ncbi.nlm.nih.gov/25269643/
https://pubmed.ncbi.nlm.nih.gov/17895324/
https://pubmed.ncbi.nlm.nih.gov/23161753/
https://pubmed.ncbi.nlm.nih.gov/32081788/
https://www.scientificamerican.com/article/pesticides-may-block-male-hormones/
https://www.mdpi.com/2305-6304/12/8/561
https://www.sciencedirect.com/science/article/abs/pii/S002432052400050X
https://pmc.ncbi.nlm.nih.gov/articles/PMC3955331/
https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight
https://pubmed.ncbi.nlm.nih.gov/17895324/
https://rbej.biomedcentral.com/articles/10.1186/s12958-020-00575-2
https://pubmed.ncbi.nlm.nih.gov/32081788/
https://academic.oup.com/clinchem/article-abstract/71/5/609/8114673
https://pmc.ncbi.nlm.nih.gov/articles/PMC11745839/
https://pmc.ncbi.nlm.nih.gov/articles/PMC7739287/
https://pmc.ncbi.nlm.nih.gov/articles/PMC11519272
https://www.sciencedirect.com/science/article/abs/pii/S138994572100544X
https://pmc.ncbi.nlm.nih.gov/articles/PMC7934563/
https://pmc.ncbi.nlm.nih.gov/articles/PMC9116406/
Thumbnail by James Kelly
Video edited by Troy Young
Script by John Milliken
The links above are affiliate links, so I receive a small commission every time you use them to purchase a product. The content contained in this video, and its accompanying description, is not intended to replace viewers’ relationships with their own medical practitioner. Always speak with your doctor regarding the content of this channel, and especially before using any products, services, or devices discussed on this channel.
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.
More from
Brad Stanfield
You also might be interested in
Too Much Histamine Is Wrecking Your Body — And Most Doctors Don't Know It
This Ancient Hack Reverses Aging In 72 Hours
The Potent Brain & Body Ketone Fuel You’ve Probably Never Heard Of: The Science Of R3HBG With Tecton’s Dr. Mike Chesne
1 Year of Lutein: Reversing Arterial Plaque
How To Maintain Muscle On A GLP-1, Why Protein Stops Working As You Get Older, The Truth About Eating “Before Bedtime” & More! Solosode #502
