Vitamin D basics: what we know
TL;DR
Sun exposure varies widely.
General information on vitamin D without dosing.
Key points
- Sun exposure varies widely.
- Testing informs decisions.
- Excess intake has risks.
- Discuss with a clinician.
Practical takeaway
Pick one change and test it for 7–14 days before adding more.
Related reading
- Supplements 101: how to think
- Supplement safety checklist
- Third-party testing: what it actually means
- Placebo effect in supplements
- Balanced breakfast
FAQ
How long should I test a change?
Try 7–14 days before judging results.
Do I need supplements for this?
Often no — habits like sleep, protein, fiber, and activity matter more.
Disclaimer: Informational only. Not medical advice. If you have a condition or take medication, consult a clinician.