What Is Collagen? A Simple Guide

Collagen is everywhere right now, from powders and capsules to ready-to-drink shots. If you've spotted it on the shelf and wondered what it actually is, here's a plain-English guide to the basics.

What collagen actually is

Collagen is a protein that occurs naturally in the body. It's one of the most abundant proteins we have, found in places like skin, connective tissue, tendons and bones. Because the body makes its own collagen, supplements are simply a convenient, concentrated source that many people like to top up with as part of a daily routine.

Most collagen supplements are made from bovine (cow), porcine (pig) or marine (fish) sources. You'll also see "hydrolysed" collagen, sometimes called collagen peptides, which just means the protein has been broken down into smaller pieces to make it easy to mix and use.

The different types you'll see

Collagen is often labelled by type, and a few names come up again and again on product packaging:

• Type I – the most common form, and the one you'll find in many everyday collagen powders.
• Type II – the form that naturally occurs in cartilage, which is why it turns up in some specialist blends.
• Type III – often appears alongside Type I in general-purpose products.
• Marine collagen – derived from fish and popular with people who prefer a non-bovine option.

How people typically use it

Collagen is popular with a wide range of people, from gym-goers to those simply looking for an easy way to add another protein source to their day. Powders are a favourite because they're largely flavourless and dissolve into hot or cold drinks, so many people stir a scoop into their morning coffee, tea or a smoothie. Capsules and liquid shots are handy alternatives if you'd rather not measure anything out.

As with any supplement, collagen is best used as part of a balanced, varied diet rather than a replacement for one. If you have any questions about whether it's right for you, it's always sensible to check with a doctor or pharmacist first.

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A quick note

This article is general information, not medical or nutritional advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle, and should not be used to prevent or treat any illness. Always read the product label, do your own research, and speak to a qualified doctor, pharmacist or registered nutritionist before starting a new supplement — especially if you are pregnant, breastfeeding, under 18, taking medication or managing a health condition.