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The Longevity Vault by Kat Fu — the platform that guides you to build your personalized roadmap, based on your risk factors & data, so you can age slower, think better & extend your prime. Its flagship, Sleep OS, helps you reduce 3 a.m wakeups.

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Substack
PricingFreemiumPublishesDaily
Issues169Foundeda year agoLast Issue5 days ago
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Latest Issues

Do you need sunlight in your eyes to sleep better?

Light needs to enter the eyes to set the body clock, so sunglasses reduce the benefit, right?

Yes and no.

Here’s why that matters.

1. Is “sunlight in the eyes” actually good for you?

Your body has a clock inside it.

This clock help...

5 days ago
10
2

Why Sleep Gets Easier to Break After Midlife

Today's piece is a little different: Scott Anderson interviewed me about sleep after midlife, why a full night can still leave someone unrested, what sleep trackers can show, and why 3 a.m. wakeups often need a more personal read.

Scott An...

12 days ago
8

"Why Can't I Stay Asleep Longer Than 5-6 Hours?"

➤ Someone recently asked me this question, and it perfectly captures what so many people experience but can't explain:

"I've had this issue for a very long time now where I wake up too early and then drift in and out of restless sleep for...

24 days ago
67
14

Does Poor Sleep Make Your Organs Age Faster?

A just-published Nature study, “Sleep chart of biological ageing clocks in middle and late life,” asked a simple but important question: does sleep duration line up with how quickly different parts of the body appear to be ageing?

The rese...

a month ago
13
2

Does Growth Hormone Affect Dementia Risk?

Growth hormone usually enters the longevity conversation through body composition.

That makes sense.

Growth hormone affects muscle, bone, fat metabolism, and tissue repair. But growth hormone also sits inside a larger overnight process th...

a month ago
9
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Authors

The writers behind this newsletter.

  • Kat Fu, M.S., M.S.

    20 yrs in health optimization, 15 in sleep | I solve sleep issues beyond hygiene & supplements | Get early access to my science-backed sleep intelligence app for men 40+ who care about brain health & longevity. iOS/Android. Waitlist \ud83d\udc47

  • Scott C Anderson

    Author of bestselling book "The Psychobiotic Revolution" from National Geographic with the brilliant Ted Dinan and John Cryan. Get the latest on the hot field of gut-brain research, with info on how you can benefit.

  • Heather Hausenblas, PhD

    Award-Winning Health Researcher | National Park Hiker | Cutting Through Wellness BS With Real Science

  • Dr Mike Hunter

    I am a retired gastroenterologist with a keen interest in the microbiome, immunity, and mitochondria. I write blog articles about gut health, wellness, exercise, nutrition, mental well-being, and photobiomodulation.

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