Skin
Collagen + barrier function
Skin is your largest organ and a visible readout of internal nutrient status. Vitamin C is the rate-limiting cofactor for the collagen that gives skin its structure; vitamin A regulates skin-cell turnover (the mechanism behind retinoids); and zinc + copper drive wound healing and the collagen cross-linking enzymes. Vitamin E and omega-3s defend the lipid barrier that locks in moisture and keeps irritants out. Deficiencies surface here early and obviously — slow healing, dryness, and breakouts are often the first visible sign of a gap elsewhere.
How your supplements + diet cover this system right now — the nutrients feeding it, where the gaps are, and your own lab readouts.
The load-bearing nutrients — if these are deficient, this system shows symptoms first. Click any to see daily targets, top food sources, and supplements that supply it.
Lab markers that report on this system’s health.
Save a lab session under My Journey → Biomarkers to see your own values for these.
Where the biochemistry happens for this system.
Systems that share a load-bearing nutrient with this one.