Sarah Kleiner
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Sarah Kleiner
This Substack is where I teach you how your body works through the lens of light, circadian biology, nutrition and mitochondrial health. Practical tools you can use every single day, how small daily shifts create huge changes, and how to build health!
10 posts · theirs
Lately
Normal ferritin labs don't mean anything (let me explain)
Two Things Everyone With a Ferritin Problem Should Rule Out
The Sunshine Protection Act Is Going to Raise Obesity Risk for Millions, and This Is Not a Debate
Substack Digest: Varicose Veins, Ferritin Diaries, and Why Light Boxes Don’t Work Like You Think
They are calling this "The Sunshine Bill" - here's why we need to stop it ASAP (and how)
The Overlooked Hair Loss Hormone That Hits You Way Harder in Midlife (And It's Not Estrogen or Thyroid)
The hidden cost of getting your vitamin D from a pill (and zoom link for tomorrow's subscriber Q&A)
Wellness Perfection that Makes people quit - Circadian Biology Series
Ferritin of 9, and a Doctor Who Said I Was “Fine” (Update)
What's a realistic vitamin D level if you don't want to take supplements?
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