Collagen is the protein that gives skin its structure, and we make less of it as we age. That's why collagen supplements are so popular. Do they really work? The honest answer has nuances.
What happens when you take it
Your body doesn't take collagen and stick it onto your skin as is. It digests it into small fragments called peptides and amino acids. The idea behind supplements is that some of those peptides act as signals that support skin's natural processes.
What studies have found
Several studies with hydrolyzed collagen have found moderate improvements in skin hydration and elasticity after 8 to 12 weeks of daily use. Many of those studies were industry-funded, so it's wise to read them with caution.
Those studies generally used between 2.5 and 10 grams a day. That's why it's important to check how much collagen each serving of the product you choose really provides.
How to read the label
- Look for «hydrolyzed collagen» or «collagen peptides».
- Check the amount per serving and how many capsules or scoops make a serving.
- See whether it includes vitamin C, which contributes to normal collagen formation.
- Be wary of promises like «erases wrinkles» or «results in 7 days».
Capsules or powder
Powder allows higher doses in a single serving; capsules are more convenient but each one holds less. Neither form is better in itself: what matters is the daily amount and consistency.
What collagen doesn't do
It doesn't replace sunscreen, which is what best protects the collagen you already have, or a topical routine. It works best as part of the whole picture: good nutrition, rest, sunscreen and a consistent routine.
Collagen types on the label
You'll see terms like type I, II or III, or «multi-collagen». For skin, studies have mostly used hydrolyzed collagen peptides of bovine or marine origin. More types on the label doesn't necessarily mean better results.
Collagen and diet
Your body makes collagen from the protein you eat, with help from vitamin C. A diet with enough protein, fruit and vegetables is the foundation; a supplement can complement it, not replace it.
How to tell if it's working
Take a photo and note how your skin feels (dry, tight, soft) before you start. Repeat at 8 and 12 weeks with the same light. If you notice no change after three months of consistent use, it's probably not worth continuing to pay for it.
Frequently asked questions
What time of day is best?
There's no magic time. What matters most is taking it every day; choose the moment that's easiest for you to remember.
Is it safe?
It's usually well tolerated. If you have allergies (for example, to fish if it's marine collagen), a kidney condition or are pregnant, check with your doctor first.
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