Known Nutrition Review: The UK's Best-Certified Gummy Brand, Scored

Here's the reality of the UK supplement market: our analysis of 781 products found that 40% carry zero third-party testing. No independent lab check. No external audit. You're trusting the label — and hoping for the best.

Known Nutrition is different. Their gummies are ISO 9001 tested, GMP certified, FDA compliant, and BRC accredited. Their liposomal liquids add HACCP certification on top of BRC. That combination — five distinct quality credentials across the range — represents the gold standard in supplement quality assurance. Their certification score of 100/100 is the highest of any gummy brand we've profiled, ahead of NOW Foods (77.0), California Gold Nutrition (65.2), and Vegavero (56.6).

But certifications alone don't tell the whole story. Known Nutrition has built something genuinely clever: supplements that people actually want to take. Their vegan gummy range comes in flavours like strawberry, blood orange, and mixed berry — and taste and flavour come up in over half of all customer reviews. That matters more than you'd think. The most effective supplement is the one you remember to take every morning, and Known Nutrition has clearly cracked that problem.

The brand has earned coverage in the Evening Standard and built a loyal direct-to-consumer customer base. At an average gummy price of £12.01, they deliver strong value alongside those certifications — a combination that's surprisingly rare in the UK supplement market.

What follows is an honest, data-driven breakdown of the 17 products we analysed: where the brand genuinely excels, where the gummy format creates natural trade-offs, and which products deliver the best results for the money.

The Advanced Marine Liquid Collagen tops the range at 82/100 — and it's the one product that breaks the gummy mould. Delivered as a 15ml liquid sachet with 5,000mg of hydrolysed marine collagen, liposomal Vitamin C, pine bark extract, and bilberry, this is a clinically meaningful dose in a format that really works. Reviewers consistently report visible improvements in skin hydration, hair thickness, and nail strength within 4–8 weeks. The only real gripe? A sachet redesign that some customers find fiddly. That's a packaging issue, not a product one.

The Daily Multivitamin Gummies (80/100) and Pregnancy Support Gummies (79/100) both punch above their weight. The multivitamin covers nine essential vitamins in a format people genuinely enjoy taking — 15 reviews, 4.93-star average, zero complaints about effectiveness. The pregnancy formula provides 400µg folic acid in a form that's gentle enough for morning sickness, backed by BRC certification that matters especially during pregnancy.

The Ashwagandha Gummies (79/100) deliver 3,000mg ashwagandha root equivalent via a 10:1 extract — a competitive dose that lines up with published research. All 13 reviews are 5 stars, with customers reporting noticeable reductions in anxiety and better sleep. These sit at £9.74 currently — genuinely impressive for a certified adaptogen supplement.

The Biotin Hair, Skin & Nails Gummies (77/100) are the brand's best-validated gummy product with 35 reviews and a 4.66-star average. Eight active ingredients in a well-balanced formulation for general hair, skin, and nail maintenance.

Every brand has stronger and weaker products — that's just honest product development. Here's where the gummy format creates the most noticeable trade-offs in Known Nutrition's range, and what to consider before purchasing.

The Turmeric & Ginger Gummies (68/100) deliver turmeric extract without a bioavailability enhancer. Without piperine or a phospholipid complex, curcumin absorption is very low — a well-known challenge that capsule formulations solve easily but gummies can't readily accommodate. Still a pleasant daily supplement, but probably not the right choice if you're after serious anti-inflammatory support.

The Debloat Gut Health Gummies (68/100) contain a single probiotic strain at 2 billion CFU — modest by any standard. The gummy base includes maltitol syrup, a FODMAP sugar alcohol that can be counterproductive for people with sensitive digestion. Worth noting, though: 10 of 12 reviewers still rated it 4 or 5 stars.

The Hydrolysed Marine Collagen Gummies (69/100) are an interesting contrast to the brand's own liquid collagen (82/100). The gummies deliver 500mg versus the liquid's 5,000mg. If collagen is your priority, the liquid is clearly the stronger choice — but if you want a tasty daily collagen top-up alongside other supplements, the gummies serve that purpose.

The Clear Skin Gummies (69/100) and Menopause Support Gummies (73/100) both contain herbal extracts at lower doses than clinical studies typically use. This is where capsule-based alternatives genuinely offer more, and it's worth considering if you have specific therapeutic needs.

Known Nutrition's 289 customer reviews tell a clear story: people genuinely like these products. The weighted average across the 17 products we scored is 4.67 out of 5 stars, with six products scoring above 4.8 and two achieving a perfect 5.0 average (Ashwagandha and B12 Energy).

The most striking pattern is what people praise — and what they don't complain about. Taste dominates the positive feedback: delicious, like sweets, look forward to my morning vitamins. For a supplement brand, solving the compliance problem this effectively is a genuine achievement. The most effective supplement in the world is useless if it sits untouched in a drawer, and Known Nutrition has eliminated that problem for their customer base.

Where customers do have complaints, it's rarely about effectiveness. Across the 17 products we analysed, only 3 have negative reviews mentioning lack of results. The rest? Packaging gripes, delivery issues, the odd comment about sugar content. The liquid collagen's 1-star reviews are entirely about a sachet redesign that leaks — every single reviewer who mentions the product itself calls it effective.

One honest caveat: all 289 reviews come from Known Nutrition's own Yotpo platform. Direct-to-consumer brands typically generate higher ratings than marketplace sellers, partly because customers who seek out a brand directly tend to be more engaged. But the volume of detailed, specific feedback — particularly around visible results from the biotin and collagen products — suggests genuine customer satisfaction rather than empty endorsement.

Known Nutrition's scoring profile tells an encouraging story. Certifications (100/100) are the clear headline — a perfect score and the highest of any brand we've profiled in any format. Side effects scores are also strong across the range, reflecting the inherently gentle nature of gummy supplements.

The effectiveness average of 72.7/100 is solid, and notably higher than you might expect from a gummy-only brand. This reflects the fact that where Known Nutrition can fit competitive doses into the format — ashwagandha, saffron for sleep, the liquid collagen — the products genuinely deliver results according to customer feedback.

Ingredient quality at 63.0/100 is the dimension most affected by the gummy format, but this needs context. A 3-gram pectin gummy has to allocate space to its binding matrix before any active ingredient enters the picture. The high certification scores confirm that Known Nutrition puts exactly what it says on the label — the scores reflect format constraints, not manufacturing shortcuts. When you see ingredient quality of 83/100 on the liquid collagen (which isn't constrained by the gummy format), you see what the brand is capable of when format isn't a limiting factor.