Stacking Supplements: How Totals Add Up
Taking several products at once means the totals matter more than any single label. Fat-soluble vitamins and minerals are where this bi
22 July 2026Read →
Where the idea came from, where it holds up, and where deficiency evidence gets borrowed to sell supplementation.
Taking several products at once means the totals matter more than any single label. Fat-soluble vitamins and minerals are where this bi
A realistic expectation is a small effect, appearing over months, most visible if you had a genuine shortfall. Anything more is marketi
Lighting, angle, makeup, camera, time of day and expression change apparent skin quality more than most interventions do. Selected pair
Some ingredients have genuine human evidence, usually small effects in specific populations, at doses many products do not contain. Oth
Psychological stress affects skin through cortisol, inflammation and barrier function, and it is a recognised trigger for several derma
Severe dehydration affects skin, but in people drinking normally, extra water does not measurably increase skin hydration. Skin water c
Smoking accelerates visible skin ageing through vascular damage and collagen breakdown, and heavy alcohol contributes through dehydrati
Skin repair, cell division and barrier recovery are concentrated during sleep, and short sleep is associated with slower barrier recove
A baseline is a short written and photographic record made before you start, so later comparison is against evidence rather than memory
Nearly all the strong evidence for nutrients affecting skin, hair and nails comes from studies in people who were deficient. Adding mor
The premise is that skin, hair and nails are built from what you eat, so nutrition should influence how they look. As a premise it is t