Good morning.

Your brain has its own immune system. Most of the time, it's a good thing - it clears out junk and fights off threats.

But in Alzheimer's, that immune system gets stuck in the "on" position. Scientists just found the exact switch that flips it - and a way to flip it back.

Let's get into it.

The rundown for this week:

Let's get to it. 👇

A major review found tea can genuinely support heart, metabolic, and brain health - but how you drink it matters - bottled and bubble teas often contain added sugars and ingredients that cancel out the benefits, while plain brewed tea (especially green tea) was linked to lower risks of heart disease, diabetes, and cognitive decline. ScienceDaily

Resistance training is one of the best-supported longevity habits - but how much do you actually need? - new reporting breaks down what the evidence says about strength training for bone density, mental health, and disease risk, and why current WHO and US guidelines may understate the minimum effective dose. Scientific American

Rejuvenate Bio raised $6M and teamed up with Merck Animal Health on gene therapy for aging pets - the partnership targets chronic, age-related conditions in dogs and cats, and is part of a growing trend of testing longevity gene therapies in animals first as a faster path to human translation. Longevity.Technology

A new clinical intelligence platform aims to bring AI into longevity clinics - Longevitix launched a system that pulls together lab results, wearable data, and clinical notes into physician-ready summaries and personalized intervention plans, part of a broader push to make longevity medicine more data-driven and less guesswork. Longevity.Technology

Your brain runs its own built-in immune system. Specialized cells patrol around the clock, clearing debris and responding to threats - normally a good thing.

In Alzheimer's, something goes wrong. These immune cells get stuck in a permanently activated state, causing chronic inflammation that damages the connections between brain cells - the synapses, which are essentially the wiring that lets neurons talk to each other and form memories.

Researchers at Scripps Research just identified the exact molecular event that flips this switch.

The science breakdown:

This is still preclinical - tested in lab-grown human brain cells and mouse models, not yet in people. But finding one precise, druggable switch inside a famously messy disease is a big deal. Senior researcher Stuart Lipton called it "a new and important therapeutic target for Alzheimer's disease."

What can you do today? The same things that lower inflammation everywhere else in the body - sleep, exercise, and avoiding things like air pollution and wildfire smoke, which the researchers note can also trigger this same chemical switch.

👉 Scripps Research | Study in Cell Chemical Biology | Neuroscience News coverage

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Here's a number that should bother you: women spend roughly nine more years than men in poor health, on average, over a lifetime. Not because they live in worse conditions - because the medicine that's supposed to help them was built around male bodies and male data.

On June 4, Melinda French Gates announced a fresh $215 million commitment through her organization Pivotal, pushing her total women's health giving to $600 million over two years. The new money targets three areas: access to care during reproductive years, health during midlife and menopause, and mental health.

This isn't abstract philanthropy. Earlier funding from Pivotal and partner Wellcome Leap is already going toward conditions where women are chronically underdiagnosed - cardiovascular disease, autoimmune conditions, and menopause-related health issues that have historically been waved off as "just part of getting older."

French Gates put it simply: "We don't need to live nine years longer than men in a state of not good health, and that's what is happening today."

For a longevity field that's spent years optimizing primarily around male physiology - and that's been thrown into the spotlight recently by Bryan Johnson's "female Blueprint" experiment with Kate Tolo - this kind of capital flowing specifically into midlife women's health research is a meaningful shift. Watch this space.
👉 TIME | Fortune

Here's an uncomfortable one: you can eat reasonably well overall and still be quietly dulling your own brain.

A new study from Monash University, published in Alzheimer's & Dementia, followed 2,192 Australian adults aged 40 to 70 - all dementia-free at the start. Researchers measured how much of their diet came from ultra-processed foods (think packaged snacks, sugary drinks, ready-to-eat meals - foods that go through heavy industrial processing and are loaded with additives, stabilizers, and flavor enhancers) using a standard food classification system.

What they found:

The researchers don't know exactly why yet, but candidates include loss of nutrients during processing, additives that may affect blood vessels in the brain, and disruption of the gut-brain axis - the communication highway between your digestive system and your brain that increasingly looks like a major player in cognitive health.

This is an observational study, so it shows a link, not proof that ultra-processed food directly causes decline. But it's another data point in a growing pile pointing the same direction.

The practical takeaway: you don't need to overhaul everything. Swapping a daily processed snack for something whole - nuts, fruit, a hard-boiled egg - is a small, repeatable shift backed by a real signal.

👉 ScienceDaily | Study in Alzheimer's & Dementia

For longevity aficionados ready to go beyond the basics, this is the book. Steele, a computational biologist, takes you deep into the actual hallmarks of aging - senescence, genomic instability, mitochondrial decline - the mechanisms behind everything else in this newsletter. No supplements to sell, no bold personal claims, just a rigorous and genuinely engaging tour of the science.

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We already know that BMI (Body Mass Index) is not the full picture.

Here’s why your waist speaks volumes 👇

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