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Type I & III Collagen, Explained: What to Look For in a Skin, Hair & Nail Supplement

Collagen is the most abundant protein in your body — the scaffolding under your skin, hair, nails, and joints. If you've ever squinted at a label wondering what "type I & III" means, here's the simple version.

What's the difference between type I and type III collagen?

There are many types, but type I and type III are the ones most associated with skin, hair, and nails (type I is also the most abundant in the body). That's why you'll see them paired together in supplements aimed at everyday beauty and skin support.

How long does collagen take to work?

Collagen is a consistency game, not an overnight one. Most people give it a daily place in their routine for several weeks to a couple of months before deciding how it fits. Think of it as a small, steady habit.

What should you look for in a collagen supplement?

Three things: hydrolyzed peptides (easier to mix and take), a fully disclosed label so you know the amount you're getting, and third-party testing for purity. If you have allergies, check the source — collagen can come from fish, egg, or bovine.

That's how we built Collagen Complex+ — types I & III, third-party tested, every batch. (Heads up: it contains egg and fish.) New here? Start with Collagen Complex+ for women 30+.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.


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