Most collagen supplements in the UK are either marine (from fish) or bovine (from cows). Both are proteins made from the same building blocks, so the real differences are where they come from, which collagen types they contain, and which diets they suit. Here is a plain side by side comparison.
Quick comparison
| Marine collagen | Bovine collagen | |
|---|---|---|
| Source | Fish skin and scales | Cow hides and bones |
| Main collagen types | Mostly type I | Types I and III |
| Suits pescatarians | Yes | No |
| Avoid if you have | A fish allergy | Dietary rules about beef |
| Suitable for vegans | No | No |
| Common forms | Powder, gummies, capsules, drinks | Powder, capsules |
What is marine collagen?
Marine collagen is made from the skin and scales of fish, a by-product of the fishing industry. It is mostly type I collagen, the most common type in the human body. It is usually sold as hydrolysed collagen, also called collagen peptides, which means the protein has been broken into smaller pieces so it mixes and dissolves easily.
- Good for: people who don't eat beef, pescatarians, and anyone who prefers a fish-based source.
- Watch out for: fish allergies. If you are allergic to fish, avoid marine collagen and speak to your GP or pharmacist.
What is bovine collagen?
Bovine collagen comes from cow hides and bones. It contains type I and type III collagen and is widely used in powders because it is usually cheaper to produce.
- Good for: people who eat beef and want a low-cost powder to add to drinks.
- Watch out for: it does not suit pescatarians or people who avoid beef for religious or personal reasons. Check how the product is sourced if that matters to you.
Marine vs bovine: which should you choose?
There is no single "better" collagen for everyone. A simple way to decide:
- Choose marine collagen if you don't eat beef, follow a pescatarian diet, or simply prefer a fish source.
- Choose bovine collagen if you eat beef, have a fish allergy, and are happy with a powder.
- Whichever you pick, read the label: the collagen source, the amount per serving, any added sugar, and the recommended daily serving.
Format matters too. If you find powders a chore, a gummy is easier to keep up with every day. We compare those in collagen gummies vs powder.
About Altavora Multi Collagen Gummies
Our Multi Collagen Gummies use marine collagen peptides in a sugar-free pomegranate and berry gummy. Each bottle holds 60 gummies, a 30-day supply at 2 a day, and every ingredient and amount is listed in the Supplement Facts on the product page. They contain fish, so they are not suitable if you have a fish allergy. Free UK delivery, and you can choose Subscribe & save for one bottle a month.
Related reading
This article is general information, not medical advice. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.