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No clinical trial has ever compared starting collagen at 25 versus 35 versus 45. The honest answer: there's no evidence for an ideal starting age, and the trials that found results included participants across a wide range.
Two UK collagen powders people keep asking about. One is a multi-ingredient blend with added actives; the other is a single-ingredient bovine powder at a fraction of the price. Here's what the labels actually say, side by side.
The labels say milligrams; the trials used grams. Here's a plain comparison of what UK collagen products deliver against the doses that were actually studied — and why the meta-analyses say more isn't better.
A single-ingredient bovine collagen powder from a UK supplement brand. What the label states, the price per serving worked out, and how that compares with other collagen we track. We haven't tested it.
A UK multi-collagen powder with a lot on the label. Here's what the label and product page actually state, the price per serving worked out, and what the page doesn't tell you. We haven't tested it.
Whole collagen is far too large to pass through the skin's outer layer. Smaller fragments are a murkier story, and what's on a cream's label is a different question from what happens when you eat it.
A collagen jelly stick is something you eat. A collagen balm stick or wand is something you put on your skin. They share a word and little else — here's how to tell which one you're after.
No serious adverse events have been reported in clinical trials using doses up to 36g per day. There's no established upper limit — but that doesn't mean more is better, and a few people have genuine reasons to check with their GP first.
No clinical trial has ever compared morning versus evening collagen supplementation. The honest answer: take it whenever you'll actually remember, because consistency over weeks is the only timing factor the evidence supports.
Nearly every collagen supplement sold in the UK says 'hydrolysed' on the pack. Here's what that actually means — and why the word matters more than the marketing around it.