Tuesday, November 3, 2026 ยท MEN'S EDITION
LongevityMorning
What's new in feeling better and living longer. 5-minute read.
Good morning. Today: what protein sources tracked with testosterone in 2,546 Finnish men, what FDA adverse-event reports showed about energy drinks, and how much sleep Sunday's clock change actually added.
01 ยท NUTRITION ยท HORMONES
Men eating more plant protein had slightly higher testosterone
In a Finnish study of 2,546 men aged 42 to 60, those eating the most plant protein had total testosterone 1.1 nmol/L higher than those eating the least, while the biggest animal-protein eaters were 1.2 nmol/L lower.
Why it matters: Protein is a top priority for men chasing muscle, and the study looked at whether the source of that protein lines up with hormone levels.
The details: Data came from the Kuopio Ischaemic Heart Disease Risk Factor Study, with diets logged over four days between 1984 and 1989 and blood tested for total testosterone and SHBG. Dairy protein was tied to lower testosterone and lower SHBG; meat protein to lower SHBG but not total testosterone. Results were adjusted for age, BMI and other factors. Published in the International Journal of Food Sciences and Nutrition.
Yes, but: It's a one-time, cross-sectional snapshot, so it can't show that protein sources change testosterone. "Although the observed differences in testosterone concentrations were statistically significant, they were relatively small," said University of Eastern Finland doctoral researcher Miika Wynne-Ellis. Funding wasn't reported in the coverage.
02 ยท CAFFEINE ยท HEART HEALTH
Energy drink reports were tied to cardiac arrest in young adults
In 28,345 reports to an FDA adverse-event database from 2017 to 2025, cardiac arrest was reported about 11 times more often with caffeine and stimulant products, such as energy drinks and pre-workout supplements, than with other foods and supplements.
Why it matters: Energy drink sales topped $20 billion in 2024, and some pre-workout products carry more than 12 times the caffeine per fluid ounce of brewed coffee, per the American Heart Association.
The details: 854 of the reports involved caffeine or stimulant products. Those reports were also tied to heart attack (about 4.5 times as likely), ventricular arrhythmias or palpitations (about 4 times) and fainting (about 2 times). About 45% of the heart-related reports tied to these products came from adults 18 to 34, with similar patterns in men and women. The University of Virginia abstract will be presented at AHA Scientific Sessions, Nov. 6 to 9.
Yes, but: Reports are voluntary, so the analysis shows associations only and can't count people who used the products without problems. The findings are preliminary and not yet peer reviewed. "This study raises concerns that products with very high amounts of caffeine may be harmful to the cardiovascular system," said UCSF cardiologist Gregory Marcus, who wasn't involved.
03 ยท SLEEP
The fall clock change added about 33 minutes of sleep
Among 11,780 UK Biobank participants aged 43 to 78 who wore wrist trackers, sleep on the Sunday the clocks went back was 33 minutes longer than the Sunday before.
Why it matters: U.S. clocks fell back on Nov. 1, and the study measured what the "extra hour" looks like in real sleep data.
The details: Sleep on the fall clock-change Sunday was also 38 minutes longer than the Sunday after, with some extra catch-up sleep on the following weekdays. In spring, sleep was about 61 to 65 minutes shorter on the Sunday clocks moved forward. The data covered clock changes from 2013 to 2015. Published in the Journal of Sleep Research.
Yes, but: The 33 minutes is a population average, and the study measured sleep duration only, not quality or alertness. Participants were in the UK, so results may not carry over to U.S. adults. Funding wasn't reported in the coverage.
RESOURCES ยท TOOLS WE LOVE
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The Glutathione Masterclass | A Complete Research Guide (2026)
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Your cells make it every day. It's your main internal antioxidant, the buffer that soaks up the damaging byproducts of making energy. Levels drop with age, alcohol, illness and hard training. When that tank runs low, a lot of other therapies stop working as well.
In this masterclass Hunter breaks it down in plain English. Then he covers who actually benefits and who can probably skip it. He walks through every delivery route and what the human data shows for each.
PODCAST
The Dr. Hyman Show: Sleep Apnea: Why CPAP Isn't Fixing the Real Problem
Out Nov. 2, Mark Hyman on sleep apnea warning signs beyond snoring, why fit people can have it too, and treatment options beyond CPAP.
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Mind Pump: 2980, 7 Diet Hacks to Stay Lean During the Holidays
Out Nov. 1, the hosts on approaching holiday meals, from eating protein and vegetables first to a family walk afterward.
Quick Hits
Steroids and fertility. A survey of 2,000 UK men aged 18 to 40 by London fertility clinic CRGH, which offers semen testing, found 3.5% said they buy testosterone from unregulated gym or social media sources; the survey wasn't peer reviewed. LADbible
Diet and heart rhythm. In 7,256 Dutch adults aged 40 to 75, closer adherence to the DASH and Dutch Healthy Diet patterns was tied to higher very-low-frequency heart rate variability but not to other HRV measures, per Scientific Reports; it was a one-time snapshot. News-Medical
WHOOP and rep counting. WHOOP appears to have acquired Motra, an Apple Watch app that counts gym reps, based on Motra staff LinkedIn posts; neither company has announced a deal. the5krunner
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LongevityMorning is for informational purposes only and isn't medical advice.