Vitamin D (25-OH)
FoundationalTrack in Cellar· yearly
What it measures
Vitamin D, made in the skin from sunlight and obtained from food.
Why it's discussed for longevity
Supports bone and immune function and is commonly tracked.
Source: MedlinePlus (NIH)Related tests in this area
- Omega-3 indexThe share of omega-3 fatty acids in red blood cell membranes…
- Vitamin B12 & folateB vitamins used to make red blood cells and DNA and to keep …
- Ferritin & iron studiesFerritin reflects the body's iron stores; iron studies descr…
- MagnesiumA mineral involved in muscle, nerve, energy, and many enzyme…