Hello. It's August 15.

No matter what nutrition advice you learned growing up, this news might make you reconsider: a 12-week trial found daily full-fat dairy didn't worsen weight, cholesterol, or insulin resistance - and even improved blood pressure.

The rundown for this week:

Let's get to it. 👇

People who did about 90-120 minutes of strength training a week had a 13% lower risk of dying from any cause - roughly two short sessions, no marathon gym time required. ScienceDaily

A new hypothesis published in Cell proposes that female reproductive biology and longevity are more tightly linked than we thought - Buck Institute researchers call it the Reproductive Resilience Hypothesis, arguing that women may hold the key to extending human healthspan, and that decades of male-focused aging research have missed a crucial biological axis. EurekAlert / Cell

Restricting a single amino acid called valine extended lifespan in male mice and improved healthspan in both sexes - a reminder that which nutrients you cut can matter as much as how many calories. Lifespan.io

A court awarded longevity company Timeline $5.3 million against sellers marketing products as containing urolithin A without actually including the ingredient - urolithin A is the compound that activates mitophagy, the cellular process of clearing out damaged mitochondria. An early sign that supplement authenticity claims are starting to have legal teeth. Longevity.Technology

A sulfur-based compound called LASSS may supercharge a key protein your muscles need to repair themselves after damage - a protein that weakens with age, making recovery slower and injuries harder to bounce back from. ScienceDaily

For decades, the standard advice was simple: if you care about your heart, skip the whole milk and full-fat cheese. A new study led by University of Toronto professor Harvey Anderson says that advice may have been too simple.

In a 12-week trial, 74 adults with overweight or obesity ate either a low-dairy diet or one with three daily servings of full-fat dairy. The dairy-heavy groups showed no meaningful increase in weight, body fat, cholesterol, or insulin resistance - and actually saw improved blood pressure, plus higher intakes of calcium, protein, and vitamin D.

Why it matters: The likely explanation is the ‘dairy matrix’ - the fat in milk and cheese is bound up with proteins and other nutrients in a way that appears to behave differently in the body than saturated fat eaten alone. If you've been avoiding whole milk and full-fat yogurt out of habit rather than any specific health reason, this is the kind of study that gives you permission to stop.

👉 ScienceDaily

There's a small, largely ignored organ behind your breastbone called the thymus - and it might matter a lot more than we thought.

Researchers at USC's Keck School of Medicine found that a hormone made by the thymus, called thymulin, keeps chronic inflammation in check. As we age, thymulin levels drop and inflammation rises - a process called ‘inflammaging’ that's linked to cancer, heart disease, and other age-related conditions. In older mice, restoring thymulin levels reduced inflammation, improved survival, and made cancer immunotherapy work better.

Why it matters: This is still mouse research, but it's the first evidence that a naturally occurring, age-declining substance can directly reverse inflammaging rather than just slow it down - a genuinely new lever for a problem that touches nearly every disease of aging.

👉 EurekAlert / USC Keck | Scientific American

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Whoop raised $575 million this year at a $10.1 billion valuation. Oura raised $900 million at $11 billion. Apple, meanwhile, is reportedly reconsidering the Apple Watch from scratch.

According to Bloomberg's Mark Gurman, Apple's design team has spent the past year exploring a screenless wearable - a real departure from over a decade of watch-face design, and a direct response to the screen-free devices from Whoop, Garmin, and Google's new Fitbit Air that have chipped away at the case for a smartwatch. Nothing is confirmed, and Gurman frames it as a multi-year undertaking rather than an imminent launch.

The bigger picture: consumer wearables have quietly become one of the most competitive corners of the longevity market, and the company that basically invented the category is now playing catch-up to rivals built entirely around passive, screen-free health tracking.

👉 Athletech News | Wareable

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Not everyone will agree with this week's dairy news, and Dr. Michael Greger is a good example of why. A physician and the founder of NutritionFacts.org, Greger has built a career combing through peer-reviewed research on diet and aging - and his conclusions lean firmly plant-forward.

How Not to Age digs into the science behind aging's major failure points - inflammation, cellular senescence, DNA damage - and translates it into what Greger calls the ‘Anti-Aging Eight,’ a set of evidence-based dietary habits. Whether or not you land exactly where he does on saturated fat, the book is heavily sourced and unusually willing to show its work, citing the specific studies behind each claim rather than asking you to take it on faith.

If this week's dairy study has you rethinking what you actually know about nutrition and aging, this is a good next stop - if only to see where the disagreements actually are.

👉 Get How Not to Age

How long do you want to live? 👇

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