Whey Protein: What It Actually Is, And Who Actually Needs It
The most popular supplement in every gym bag. Here's what it does, and whether you're actually one of the people who needs it.
The most abundant structural protein in the body, found in skin, tendons, ligaments, and joints — production naturally declines with age, which is the basis for most collagen supplement marketing.
Several studies have found modest improvements in skin elasticity and hydration with consistent collagen supplementation over 8-12 weeks — a genuine, if moderate, effect, not simply marketing fiction.
Some evidence supports collagen (particularly type II) for joint comfort in people with existing joint issues, though the effect size is generally modest and shouldn't be expected to reverse significant joint damage.
The body can synthesize collagen from adequate protein and vitamin C intake through regular food — supplementing directly is a reasonable convenience option, not a requirement for people already eating a balanced, protein-adequate diet.