Pure Collagen Supplements UK: Gold Collagen, Planet Paleo, Bare Biology and More Compared

Reviewed and updated: 4 November 2026

Pure Vitamins UK is an independent British brand. We are not connected to, endorsed by or affiliated with Gold Collagen, Planet Paleo, Bare Biology, WeightWorld or their owners. These names are trademarks of their respective owners and are named here only to identify the products compared.

Pure collagen supplements in the UK come in three main shapes: an unflavoured powder that is nothing but collagen, a ready-to-drink liquid with collagen plus a list of vitamins, or capsules you swallow with water. In this guide I compare five popular options side by side: Gold Collagen Pure Plus, Planet Paleo Pure Collagen, Bare Biology Skinful Pure Marine Collagen, WeightWorld Pure Marine Collagen Capsules and our own Marine Collagen Capsules, on collagen per day, format, what else is inside, and price per day.

I'm Dr. Miron, founder of Pure Vitamins UK. We make one of the products in this comparison, so I've stuck to facts you can check for yourself, with a link to every page I used, and I'll say plainly where another product may be the better fit for you.

Pure collagen supplements UK: the quick answer

• Most collagen per day: the powders. Planet Paleo Pure Collagen gives 7.5 g per serving and Bare Biology Skinful gives 5 g per serving (the brand suggests 5 to 10 g a day), with nothing else added.
• Collagen plus vitamins in a drink: Gold Collagen Pure Plus, 5,000 mg of fish collagen per 50 ml bottle alongside vitamins, minerals and other ingredients, £43.00 for 10 days at Boots.
• Lowest cost per day here: WeightWorld Pure Marine Collagen Capsules, 1,200 mg per 2 capsules, about 32p a day on today's price.
• Our Marine Collagen Capsules: 2,000 mg hydrolysed marine collagen with 40 mg hyaluronic acid and 24 mg vitamin C per 2 capsules, £12.99 for 30 days, about 43p a day. It is a three-ingredient formula, not a single-ingredient product.
• The honest trade-off: capsules are tidy and portable, but they hold far less collagen per day than a scoop of powder.

Our pick for this guide

Would you rather swallow two capsules than mix a powder?

Each 2-capsule serving provides 2,000 mg hydrolysed marine collagen peptides, 40 mg hyaluronic acid and 24 mg vitamin C, in a plant-based HPMC capsule. Contains fish. A food supplement, not a replacement for medical advice.

From £12.99 · 60 capsules

Shop Marine Collagen Capsules →

What do people mean by "pure collagen"?

When someone searches for pure collagen, they usually mean one of three things. Some want a single-ingredient product: collagen peptides and nothing else, no flavourings, sweeteners or added vitamins. Some mean a named, traceable source, such as wild-caught cod skin or grass-fed bovine hide. And some are simply searching for a product that has "Pure" in its name, of which there are several in the UK.

It helps to know what collagen supplements actually are. Almost all of them use hydrolysed collagen, sometimes called collagen peptides or collagen hydrolysate. The long collagen protein from fish skin, scales or cattle hide is broken down with enzymes into short chains that dissolve easily in drinks. Marine collagen is mostly type I; bovine collagen usually provides types I and III. If you want the background, I've written more on what hydrolysed collagen is and on type I and III collagen.

By the single-ingredient definition, Planet Paleo Pure Collagen and Bare Biology Skinful are the closest fit here: each lists collagen as its only ingredient. Our Marine Collagen Capsules are a deliberate three-ingredient formula, and Gold Collagen Pure Plus has a much longer ingredient list, so neither is "pure" in that sense, and I'd rather say so up front.

The five products side by side

Here is what each product's own page, or the UK retailer listing for Gold Collagen, showed when I checked on 4 November 2026. I've only included facts I could see on a live page today.

At a glance:

• Most collagen per serving: Planet Paleo (7.5 g), then Bare Biology and Gold Collagen (5 g each).
• Single-ingredient labels: Planet Paleo and Bare Biology.
• Lowest cost per day: WeightWorld capsules, then our capsules.
• Only option with a full vitamin and mineral blend: Gold Collagen Pure Plus.
• Collagen with vitamin C and hyaluronic acid in a capsule: our Marine Collagen Capsules.

Collagen per day: why the grams matter

This is the comparison I'd look at first. A capsule can only hold so much powder, so the capsule products in this comparison land at 1 to 2 grams of collagen a day, while a single scoop of powder or a liquid shot typically gives 5 grams or more. In this group, a day of Planet Paleo provides 7.5 g, Bare Biology 5 to 10 g, Gold Collagen 5 g, our capsules 2 g and WeightWorld 1.2 g.

If your goal is simply to get the most collagen protein per day, a powder will do that far more easily than capsules, and I'd point you towards one. Where capsules earn their place is convenience: no measuring, no taste or texture in your coffee, and something you can keep in a desk drawer or a bag. For many people the best product is the one they actually remember to take every day.

When you work out value, it is worth comparing price per gram of collagen as well as price per day. On today's prices, Planet Paleo's powder gives you more collagen for each pound spent than either capsule product (about 10p per gram, against roughly 22p per gram for ours and 27p for WeightWorld); the capsules cost less per day because the daily serving is smaller. Both statements are true, and which one matters depends on what you want from the product.

Marine, bovine or a mix: does the source matter?

Four of these products use fish collagen (Bare Biology from wild cod skin, WeightWorld from fish scales, Gold Collagen from fish, and ours from marine sources), while Planet Paleo uses grass-fed bovine hide. In practice the source matters most for three reasons:

• Diet and allergies: fish collagen is out if you avoid fish, and bovine is out if you avoid beef. None of the products here is suitable for vegans, because collagen only comes from animals.
• Type: fish collagen is mainly type I; bovine collagen supplies types I and III. WeightWorld lists types 1 and 3 for its fish-scale collagen.
• Personal preference: some people like a named, traceable raw material, such as Bare Biology's MSC-certified wild cod.

Once hydrolysed, both sources are broken down into similar small peptides. Research using labelled collagen has shown that peptides containing the amino acid hydroxyproline appear in the blood after people take hydrolysed fish gelatin, which is part of why hydrolysed forms are the standard in supplements. I've gone into more detail in marine vs bovine collagen.

What else is in the pack?

Reading the full ingredient list is where these products really differ.

Single-ingredient powders. Planet Paleo lists only grass-fed bovine collagen hydrolysate, and Bare Biology lists only collagen peptides from cod skin. If "pure" means nothing else in the tub, these two match that best.

Our capsules. We pair 2,000 mg of marine collagen with 40 mg of hyaluronic acid and 24 mg of vitamin C, inside a plant-based capsule shell. We add vitamin C on purpose: vitamin C contributes to normal collagen formation for the normal function of skin. That is a statement about vitamin C itself; collagen is the protein the body builds, and vitamin C is one of the nutrients involved in making it.

Gold Collagen Pure Plus. Alongside 5,000 mg of fish collagen, each bottle contains a broad blend of vitamins and minerals, hyaluronic acid, L-arginine, rocket extract, borage seed oil, N-acetyl glucosamine and black pepper extract, sweetened with steviol glycosides and containing polyols. The ingredient list includes fish, a crustacean-derived ingredient and soy lecithin, so check the label carefully if you have allergies. If you also take a multivitamin, add up the vitamins across both products.

WeightWorld capsules. The page lists marine collagen in an HPMC capsule and says it is free from magnesium stearate and artificial additives.

What the research on collagen supplements shows

Collagen is one of the most researched supplements on the market, and it is worth being honest about where that research stands. A 2025 systematic review and meta-analysis of 23 randomised trials with 1,474 participants found that, taken together, the trials reported improvements in skin hydration, elasticity and wrinkle measures. But when the authors split the trials by funding and quality, the positive results came from industry-funded and lower-quality studies; the independent and higher-quality trials showed no significant effect.

So I'd think of collagen as a protein many people enjoy adding to their routine, rather than something with a guaranteed result. That is one reason we include vitamin C in our capsules, and why I'd always put a balanced diet with plenty of protein and vitamin C-rich foods first. There's more on that in collagen and vitamin C and on daily amounts in collagen dosage.

Comparing price per day fairly

Pack prices are misleading on their own because each product lasts a different length of time. Here is the arithmetic on prices checked on 4 November 2026:

• WeightWorld capsules: £19.49 ÷ 60 days = about 32p a day for 1,200 mg collagen.
• Our Marine Collagen Capsules: £12.99 ÷ 30 days = about 43p a day for 2,000 mg collagen plus hyaluronic acid and vitamin C.
• Planet Paleo Pure Collagen 225 g: £22.99 ÷ 30 servings = about 77p a day for 7.5 g collagen.
• Gold Collagen Pure Plus: £43.00 ÷ 10 bottles = £4.30 a day for 5,000 mg collagen plus vitamins and other ingredients.
• Bare Biology Skinful: £39.95 a tub; the tub weight is not shown on the product page, so I have not worked out an exact daily figure.

Delivery matters for small orders too. WeightWorld charges £1.99 under £35, Planet Paleo offers free shipping over £35, Bare Biology offers free standard delivery with no minimum, Boots charges £3.95 under £25, and we offer free UK delivery over £25. Subscriptions change the numbers again: Planet Paleo, Bare Biology and WeightWorld all list subscribe-and-save options.

Which one suits you?

Each of these fits a different person, and I'd rather you choose the right one than ours by default.

• Choose Planet Paleo Pure Collagen if you want a single-ingredient bovine powder with a large daily serving and you're happy to stir it into coffee or a smoothie.
• Choose Bare Biology Skinful if you want a single-ingredient marine powder from a named, MSC-certified wild cod source, and you'd like the flexibility of 5 or 10 g a day.
• Choose Gold Collagen Pure Plus if you prefer a ready-to-drink shot and want collagen together with a vitamin and mineral blend in one bottle, and the daily cost suits your budget.
• Choose WeightWorld capsules if lowest cost per day in capsule form is your priority.
• Choose our Marine Collagen Capsules if you want capsules rather than powder, with more collagen per serving than the lowest-cost capsule here, plus vitamin C and hyaluronic acid in the same dose.

If a doctor, dermatologist, dietitian or other practitioner recommended a particular product to you, please check with them before switching.

How to take collagen

• Powders: stir into a hot or cold drink, porridge or a smoothie. Follow the scoop size on the pack, as servings differ between brands.
• Capsules: take with water and food. Our capsules are 2 a day with a meal and a full glass of water.
• Liquids: one bottle a day, as directed on the pack.
• Consistency: pick a time you'll remember, such as breakfast, and keep it steady.

For a wider look at choosing between brands, see my guide to how to choose the best collagen supplement in the UK.

A few cautions worth knowing

• Marine collagen comes from fish, so avoid it if you have a fish allergy. Some products may also contain traces of shellfish or other allergens, so read the label.
• Collagen is a protein. If you have been advised to limit protein, for example because of kidney disease, speak to your GP first.
• If you are pregnant or breastfeeding, ask your midwife or GP before starting a new supplement, especially multi-ingredient products.
• Products that combine collagen with vitamins and minerals add to anything else you take, so add up totals if you also use a multivitamin.
• Products containing polyols can have a laxative effect if you have too much.

Frequently asked questions

Is Pure Vitamins the same company as Gold Collagen or Planet Paleo?

No. Pure Vitamins UK is an independent British brand. We are not connected to, endorsed by or affiliated with Gold Collagen, Planet Paleo, Bare Biology, WeightWorld or their owners. We name their products only so you can compare them.

What does "pure collagen" mean?

Usually a product whose only ingredient is collagen peptides, with no flavourings, sweeteners or added vitamins. Planet Paleo Pure Collagen and Bare Biology Skinful list collagen as their only ingredient. Our Marine Collagen Capsules also contain hyaluronic acid and vitamin C.

Are collagen capsules or powder better?

Powders give far more collagen per day, often 5 g or more per scoop, while capsules usually provide 1 to 2 g. Capsules are easier to carry and need no mixing. Choose the format you'll take consistently.

Which collagen is cheapest per day?

On prices checked on 4 November 2026, WeightWorld Pure Marine Collagen Capsules worked out at about 32p a day, our Marine Collagen Capsules about 43p, Planet Paleo Pure Collagen 225 g about 77p and Gold Collagen Pure Plus £4.30.

Is marine collagen suitable for vegans?

No. All collagen comes from animals. Marine collagen is made from fish skin or scales, and bovine collagen from cattle hide.

Keep reading

• How to choose the best collagen supplement in the UK
• Marine vs bovine collagen
• Collagen powder vs capsules
• Why collagen and vitamin C are paired
• Collagen and hyaluronic acid, and how to take collagen
• All supplement guides
• Pure Vitamins UK home

Our pick for this guide

Want collagen and vitamin C together in one daily serving?

2,000 mg hydrolysed marine collagen peptides with 40 mg hyaluronic acid and 24 mg vitamin C in 2 capsules a day, a 30-day pouch. A food supplement, not a replacement for medical advice.

From £12.99 · 60 capsules

Shop Marine Collagen Capsules →

Where these facts come from

• Planet Paleo Pure Collagen, 225 g, £22.99, 7.5 g serving, delivery terms: planetpaleo.co (checked 4 November 2026)
• Bare Biology Skinful Pure Marine Collagen, £39.95, 5 g serving, delivery terms: barebiology.com (checked 4 November 2026)
• WeightWorld Pure Marine Collagen Capsules, 120 capsules, £19.49, delivery terms: weightworld.uk (checked 4 November 2026)
• Gold Collagen Pure Plus 10 x 50 ml, £43.00, ingredients, delivery terms: Boots UK listing (checked 4 November 2026)
• Pure Vitamins Marine Collagen Capsules, £12.99: our product page (checked 4 November 2026)

Sources

• Myung SK, Park Y (2025). Effects of collagen supplements on skin aging: a systematic review and meta-analysis of randomized controlled trials. Am J Med 138(9):1264-1277. PubMed 40324552
• Taga Y et al. (2014). Highly accurate quantification of hydroxyproline-containing peptides in blood using a protease digest of stable isotope-labeled collagen. J Agric Food Chem 62(50):12096-102. PubMed 25417748
• Department of Health and Social Care. Great Britain nutrition and health claims (NHC) register. gov.uk

Dr. Miron, Founder of Pure Vitamins UK

Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. This article is for general information and is not medical advice. Always speak to your GP or pharmacist before taking a supplement if you are pregnant, breastfeeding, have a medical condition or take medication. Prices and product details for other brands were checked on 4 November 2026 and may change.