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Benefits of Vitamin D

⚠️ Disclaimer: I'm a hobbyist experimenting on myself. Take these results with a big grain of salt. Correlation is not causation!

Vitamin D is said to improve bone health, immune function, mood, among other things. I supplemented vitamin D on and off for 60 days, measuring how it correlated with my sleep and vital stats (captured with a WHOOP band and an Apple Watch).

LongevityLab stat card for vitamin d One unit in the graph corresponds to 5000 IU of vitamin D.

The results

In my 60-day experiment, vitamin D intake correlated with:

My takeaways from this experiment:

All in all, the experiment was a success!


If you do decide to try supplementing vitamin D yourself, be sure to not go over the recommended dose. Excessive vitamin D intake can cause kidney damage, nausea, and vomiting, among other things. Consult healthcare professionals before starting any new supplement regimen.

Other supplements

LongevityLab supplement tracking

LongevityLab allows you to track anything, in any way you want. If you want to take your health tracking to the next level, you should give it a try. Sign up for the waitlist below to get access as soon as it's available.