Marine and bovine collagen peptides are both hydrolysed collagen: protein broken into short peptide chains so the powder dissolves in hot or cold drinks. The main differences are the source and the collagen types. Marine collagen comes from fish skin and scales and is mainly type I; bovine collagen comes from cattle and contains types I and III. Neither is vegan, marine collagen is not suitable for anyone with a fish allergy, and there are no authorised health claims for collagen in the UK, so choose on source, diet and price per serving.
Marine vs bovine collagen at a glance
| Marine collagen | Bovine collagen | |
|---|---|---|
| Source | Skin and scales of wild-caught fish | Grass-fed, pasture-raised cattle |
| Collagen types | Mainly type I | Types I and III |
| Allergens | Fish — avoid with a fish allergy | No fish |
| Vegan / vegetarian | No | No |
| Pescatarian | Yes | No |
| Taste | Unflavoured | Unflavoured |
| Dissolves in | Hot or cold drinks and food | Hot or cold drinks and food |
JeaKen collagen powders compared
| Product | Source | Size | Suggested serving | Price |
|---|---|---|---|---|
| Marine Collagen Peptides | Wild-caught fish, type I | 400g | 1–2 tbsp (approx. 10–13g); roughly 30–40 servings | £30.95 (about 77p–£1.03 per serving) |
| Bovine Collagen Peptides | Grass-fed cattle, types I and III | 400g | 1–2 tbsp (approx. 10–13g); roughly 30–40 servings | £30.95 (about 77p–£1.03 per serving) |
| Hydrolyzed Collagen Peptides Powder | Grass-fed cattle | 400g | 1–2 tbsp; about a month at two tablespoons a day | £35.95 |
Prices correct at the time of writing; see each product page for the current price.
Collagen is the most abundant structural protein in the human body — it is the material of skin, bone, tendon, cartilage and connective tissue. Collagen supplements have become one of the fastest-growing categories in the UK, and almost all of them are sold as hydrolysed collagen peptides rather than as whole collagen.
This guide covers what that processing actually is, how marine and bovine collagen differ, and what is worth comparing on a label. It does not tell you what collagen will do for you: no health claims are authorised for collagen under UK or EU law, and JeaKen makes none.
1. What “hydrolysed” actually means
Whole collagen is a large, tightly wound triple-helix protein that will not dissolve in a cold drink. Hydrolysis uses enzymes to cut those long chains into much shorter fragments called peptides — typically a few thousand daltons, against roughly 300,000 for intact collagen.
The differences that follow from this are physical, and they are the reason the category is sold the way it is:
- Solubility: hydrolysed peptides dissolve in cold water, coffee or juice without setting into a gel. Gelatine and unprocessed collagen do not.
- Amino acid profile: collagen is unusually high in glycine, proline and hydroxyproline compared with everyday dietary proteins such as whey or casein. It is not a complete protein — it contains no tryptophan.
- Serving format: because it is soluble and close to tasteless, it is normally sold as an unflavoured powder rather than in capsules, which makes servings of 5–10 g a day practical. Reaching the same amount in capsules would take a great many of them.
2. Marine and bovine: the real differences
The two sources on sale are not interchangeable, and the distinction is about material and suitability rather than quality:
- Marine collagen is extracted from fish skin and scales and is predominantly Type I. It is suitable for pescatarians. It contains fish and must be avoided by anyone with a fish allergy.
- Bovine collagen is extracted from cattle hide and bone and supplies Types I and III. “Grass-fed” describes how the cattle were raised, not the potency of the finished powder.
- Neither is vegan or vegetarian. Collagen is an animal protein by definition, and products advertised as “vegan collagen” are not collagen — they are other ingredients sold alongside the word.
3. What to compare on the label
Collagen powders vary far more in what surrounds the collagen than in the collagen itself. Worth checking:
- Grams of collagen per serving, and servings per tub. This is the only fair way to compare price. A 400 g tub at a 10 g serving is 40 days; the same tub at 5 g is 80.
- What else is in it. Some powders are mostly collagen; others carry flavourings, sweeteners, anti-caking agents or bulking agents that are not listed on the front of the pack.
- Source and type, as above.
- Where it was manufactured, and to what standard.
JeaKen collagen powders
Both are unflavoured 400 g powders, manufactured in the UK to GMP and HACCP standards, with no fillers or bulking agents:
-
Marine:
JeaKen Marine Collagen Peptides — hydrolysed Type I collagen from fish. Contains fish. -
Bovine:
JeaKen Bovine Collagen Peptides — hydrolysed Types I and III from grass-fed cattle. Unflavoured, no added sweeteners.
4. How to use it
Hydrolysed collagen powder dissolves in hot or cold liquid, so it can be stirred into coffee, tea, water, juice or a smoothie without changing the texture. Unflavoured powder can also be mixed into porridge, soup or yoghurt.
Follow the serving size on the label and do not exceed it. Food supplements are not a substitute for a varied and balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, taking medication or under medical supervision, speak to your doctor or pharmacist before starting any new supplement.
Frequently asked questions
Is marine or bovine collagen better?
Neither is better in general. Marine collagen is mainly type I and suits pescatarians; bovine collagen contains types I and III. Choose on source, any fish allergy, diet and price per serving.
Is collagen powder vegan?
No. Collagen only comes from animals. Marine collagen comes from fish and bovine collagen from cattle. Plant products sold as “vegan collagen” contain no collagen.
What does hydrolysed mean?
Hydrolysis breaks collagen into short peptide chains, which is why the powder dissolves in hot or cold liquids without setting like gelatine.
How much collagen powder should I take?
JeaKen suggests 1–2 tablespoons (approx. 10–13g) once a day, stirred into a drink or food. A 400g tub gives roughly 30–40 servings.
Can I take marine collagen with a fish allergy?
No. Marine collagen is made from fish, so anyone with a fish allergy should avoid it. Bovine collagen contains no fish.
Are there health claims for collagen?
No health claims for collagen are authorised in the UK. Food supplements should not be used as a substitute for a varied and balanced diet.
