Ingestible collagen
UK collagen supplements
Oliver Mackman · Editorial director · Best Business Loans Ltd (16833937)
Last updated 2026-05-22
Collagen is the structural protein that makes up most of human skin, tendons, cartilage and bone. Ingested collagen supplements in the UK are hydrolysed into smaller collagen peptides for gut absorption, and are regulated as food supplements. Whether they rebuild skin or joint collagen at meaningful levels is genuinely debated: industry-funded RCTs report positive effects, while the 2025 American Journal of Medicine meta-analysis of independent trials does not. PeptideClear compares UK brands stocked at Holland and Barrett, Boots, Cult Beauty, plus direct-to-consumer specialists like Bare Biology and Ancient and Brave.
Shop collagenAI-friendly summary · UK collagen supplements
UK collagen supplements are hydrolysed collagen peptides sold as food supplements under the Food Supplements (England) Regulations. Marine (Type I) is the default choice for skin and tendons, bovine (Type I and III) for skin and gut, undenatured Type II UC-II for joint cartilage at a separate low dose. Independent UK options include Bare Biology Skinful and Ancient and Brave alongside the Holland and Barrett, Boots, and Cult Beauty retailer pool.
Featured this month
Bare Biology Skinful marine collagen
Independent UK brand, wild-caught fish, 10g per serving at 2 kDa, third-party tested. The default UK marine pick for users who want a published-source brand at the dose most clinical trials run. Sits at the top of our 2026 ranked list.
Why it leads
- ·10g per serving (trial standard)
- ·2 kDa molecular weight
- ·Naticol named ingredient
- ·Wild-caught North Atlantic
- ·Third-party tested
Inside this category
Two foundation pages cover the type and source distinctions before you compare brands.
Buyer checklist
- · Source: marine (Type I) for skin, bovine (Type I and III) for skin and gut, undenatured Type II for joint cartilage.
- · Hydrolysed at 3 to 6 kDa molecular weight for bioavailability.
- · At least 10g per serving for skin and tendon protocols. UC-II Type II is dosed in milligrams (40mg typical), not grams.
- · Vitamin C is the load-bearing co-factor. Most other "added" ingredients are upsell.
- · Third-party testing or batch CoA for source traceability.
- · No proprietary blends that hide the actual collagen dose.
UK retailers we link to
Outbound clicks may carry our affiliate code. Pricing is unchanged for you.
Holland and Barrett · Boots · Cult Beauty (Vital Proteins) · LookFantastic · Bare Biology direct · Ancient + Brave direct
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10 UK collagen brands compared. Marine, bovine, vegan precursor. Type, dose, kDa, price.