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Research Reports: Independent Product Analysis

Data-driven analysis across supplements, skincare, and pet food. Each report is backed by real review data and independent research.

18 reports published
creatine creapure supplements value analysis ingredient quality

Creapure vs Generic Creatine: Is the German Premium Worth Paying?

We scored 31 creatine products sold in the UK. Two use Creapure. Here's what the data actually shows.

“Bulk's Creapure creatine scored 91/100 at £0.17 per serving. The real Creapure premium over the cheapest generic? About 7p per day, or £25 per year. Far less than most people assume.”

· 7 min read
father's day men's health supplements gift guide vitamin d omega-3 creatine magnesium zinc coq10

Father's Day 2026: The Best Supplements for Dads, by Age

We scored nearly 500 supplements across 13 categories and checked every health claim against systematic reviews, meta-analyses, and NHS guidance. Here's what dads in their 30s, 40s, and 50s should be taking — and what they can skip.

“Most UK men are short on at least one key nutrient. Nearly half have below-optimal vitamin D, and the average man gets only about 90% of the recommended magnesium intake. The NHS recommends vitamin D for everyone — and beyond that, the evidence points to five more supplements whose case gets stronger with age: omega-3, magnesium, creatine, zinc, and CoQ10.”

· 14 min read
supplements brand-analysis gummies vegan uk-brand known-nutrition certified-supplements gummy-vitamins-uk best-gummy-vitamins known-nutrition-review iso-certified-supplements brc-certified vegan-gummy-vitamins

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

We scored 17 of their best-selling products across 289 real reviews. In a market where 40% of supplements skip third-party testing entirely, Known Nutrition's ISO/GMP/BRC triple certification puts them in a league of their own.

“Known Nutrition scores 100/100 on certifications — the only gummy brand we've profiled to achieve a perfect score. With ISO 9001, GMP, FDA, and BRC accreditation on their gummies, plus HACCP certification on their liposomal liquids, and an average gummy price of just £12.01, this is one of the strongest trust-to-value propositions in UK supplements.”

· 12 min read
supplements brand-analysis budget amazon-uk

Are Nutrition Geeks Supplements Any Good? We Scored All 14

We scored 14 products from one of Amazon UK's fastest-growing budget supplement brands. The value is real — but so are the gaps.

“Nutrition Geeks averages 69.4/100 overall with strong value scores (81.4/100) but the lowest certification scores (35.4/100) of any brand we've profiled.”

· 8 min read
cat-food brands value

Felix Against Gourmet

Two Purina brands dominate UK cat food shelves. We scored all 91 products to find where they actually differ.

“Across 91 products, Gourmet edges ahead by 1.8 points overall — but Gourmet leads on ingredient quality while Felix wins on value.”

· 9 min read
skincare retinol effectiveness

The Retinol Reality Check

42 retinol and retinoid products tested by our AI. The results challenge several popular assumptions about anti-ageing skincare.

“Budget retinols (under £15) score 58.0/100 on effectiveness vs 72.9/100 for premium (£30+) — the price gap doesn't match the quality gap.”

· 11 min read
skincare ingredients combinations

Which Skincare Combinations Actually Work

Cross-referencing effectiveness scores across 244 skincare products reveals which active ingredient pairings deliver results and which clash.

“Multi-active skincare products (116) average 66.0/100 effectiveness vs 67.3/100 for single-active (97).”

· 11 min read
supplements ingredients value

The Hidden Cost of Supplement Stacking

When your vitamin B complex, multivitamin, and energy blend all contain the same ingredients, you're paying three times for one benefit.

“Vitamin C appears in 8 different supplement categories. Targeted supplements score 76.0/100 vs 67.0/100 for broad-spectrum blends.”

· 10 min read
supplements brands vegavero

Vegavero and the German Efficiency Myth

How Germany's biggest Amazon supplement brand stacks up against established UK competitors on ingredient quality, value, and transparency.

“Vegavero's 10 products average 74.8/100 overall — competitive but trailing California Gold Nutrition at 82.2/100.”

· 11 min read
amazon reviews methodology

The Amazon 5-Star Illusion

Our AI disagrees with Amazon ratings on a third of products. Here's why star ratings mislead UK consumers.

“Amazon star ratings disagree with our AI analysis on 45% of 1154 products. 45% are significantly overrated by Amazon reviewers.”

· 13 min read
supplements brands trust

Brand Trust Index 2026

Ranking the UK's top 30 supplement brands by average AI quality score, consistency, and certification coverage.

“Of 53 supplement brands with 3+ products, Garden of Life tops our Trust Index at 87/100 — combining quality, consistency, and certification coverage.”

· 12 min read
supplements certifications safety

The Certification Black Hole

What percentage of the UK's top-rated supplements have zero third-party testing?

“40% of the 781 supplements in our database have no third-party testing certification whatsoever.”

· 9 min read
dog-food cat-food transparency

Transparency Report: What's Really in Your Pet Food?

Dog food and cat food brands ranked by ingredient transparency — named meats vs mysterious 'derivatives'.

“Cat food averages just 37.0/100 on transparency — 29.8 points lower than dog food (66.8/100). 16 pet food products score well overall despite poor transparency.”

· 10 min read
supplements protein value

The Protein Powder Value Index

Price per gram of protein: which UK whey protein gives you the most bang for your buck?

“The most expensive protein costs 5.2x more per gram than the cheapest — £0.093/g vs £0.018/g — with no consistent quality advantage.”

· 10 min read
dog-food puppy value

The Puppy Premium Tax

Do 'Puppy Food' products genuinely score higher on ingredient quality, or is it just more expensive marketing?

“Puppy food scores 1.8 points lower on average than adult dog food, but costs 3.1% more.”

· 11 min read
supplements side-effects safety

Side Effects: The Silent Score

Which supplement categories have the worst side effect profiles — and is there a trade-off with effectiveness?

“Pre-Workout & Performance has the worst average side effect score at 65.7/100. Only 226 out of 781 supplements score above 75 on both effectiveness and safety.”

· 13 min read
skincare ingredients effectiveness

UK Skincare Ingredient Roulette

Which active ingredients actually correlate with higher effectiveness scores in our database of 244 products?

“Across 244 UK skincare products, Moisturisers leads with an average effectiveness score of 73.3/100.”

· 11 min read
supplements sleep effectiveness

The Sleep Supplement Showdown

Magnesium vs 5-HTP vs Valerian vs Melatonin — what does the data actually say about effectiveness?

“Among 23 sleep supplements, Magnesium-based products lead with 67.5/100 average effectiveness.”

· 13 min read