
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!
| Platform | Pricing | Freemium | Publishes | Twice weekly | |
|---|---|---|---|---|---|
| Issues | 79 | Founded | 10 months ago | Last Issue | 4 days ago |
| Active | |||||

Here’s exactly what the guidelines mean if you have been told everything is “normal”
The new iron deficiency guidelines just dropped, and I have thoughts
The Lesson (As well as my current supplement stack to rebuild my Ferritin)
Hey - Thanks for hanging with me in all of this low ferritin content if you joined my Substack to learn about sunlight and health.
An initial take on my most recent labs (and why ferritin isn’t the full picture)
As promised - I am sharing my most recent labs after being “on a mission” since June to fix my entire iron panel (as well as improve my T3 - and Neutrophil to...
My personal comprehensive list and why
Ninety days ago, my iron panel was not where I wanted it (my ferritin was a 9 - and all my other iron markers were trending down).
(Why you should care & What you can actually do about it now)
Every year when summer comes to a close - I get the same question - “I was outside all summer - how is my vitamin D still low?”.
Subscribers, engagement, traffic and sponsorship for Sarah Kleiner.
| Subscribers | Engagement | 78 | Monthly Web Visits | ||
|---|---|---|---|---|---|
| Accepts Sponsors | Estimated Cost per Ad | ||||
How this newsletter ranks in the official Substack charts.
| #85 | |
| #250 |
The writers behind this newsletter.
I teach you how to rebuild energy, mood and metabolic flexibility using light, timing, optimizing leptin, mitochondrial health, nutrition and circadian biology. Board Certified in Applied Quantum Biology.
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