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We Tested 4 Biotin in the UK — See Which One Is Best

We analysed 4 biotin products, scoring each on effectiveness, ingredient quality, value for money, side effects, and certifications. Here are the top-rated picks for 2026, ranked by overall score.

Last updated: 07 April 2026 · Reviewed by Bart, Health & Tech Enthusiast

Quick Picks

🥇
Best Overall
Biotin 5000µg 50 Vegi Capsules
76.0 £16.20
🥈
Best Value
Biotin, 5,000 mcg, 120 Veg Capsules
73.0 £9.34
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Most Reviewed
Biotin, 10,000 mcg, 120 Tablets
65.0 £8.57
#1
Biotin 5000µg 50 Vegi Capsules
Biotin 5000µg 50 Vegi Capsules

Solgar

Solgar's Biotin 5000µg Vegi Capsules are a high-dose, single-ingredient biotin supplement from one of the UK's most trusted supplement brands. Reviewe...

People experiencing hair thinning or hair loss Those recovering from hair transplant surgery Vegans and vegetarians seeking B-vitamin support
76.0
Score
87.0 Side Effects
£16.20
Amazon UK
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#2
Biotin 5000µg 100 Vegi Capsules
Biotin 5000µg 100 Vegi Capsules

Solgar

Solgar Biotin 5000µg is a high-dose B7 supplement from a well-established, premium supplement brand, primarily used by reviewers to address hair loss ...

People experiencing hair loss or thinning due to nutritional deficiency or hormonal changes Post-hair-transplant recovery support Vegans and vegetarians needing a biotin-rich supplement
74.0
Score
80.0 Ingredient Quality
£16.20
Amazon UK
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#3
Biotin, 5,000 mcg, 120 Veg Capsules
Biotin, 5,000 mcg, 120 Veg Capsules

NOW Foods

NOW Foods Biotin at 5,000 mcg delivers 100 times the UK adequate intake of vitamin B7 in a single capsule — a high but standard dose for supplemental ...

People with brittle nails or diffuse hair thinning who suspect B vitamin insufficiency Anyone wanting a plain, affordable high-dose biotin without proprietary blends or extras Men supporting beard health — several reviewers specifically mention beard thickening and improved beard condition
73.0
Score
88.0 Value For Money
£9.34
iHerb
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#4
Biotin, 10,000 mcg, 120 Tablets
Biotin, 10,000 mcg, 120 Tablets

21st Century

21st Century's biotin comes in at 10,000 mcg per tablet — 333 times the reference intake — making it one of the more aggressive doses on the market. A...

People with suspected biotin deficiency due to restricted diets or digestive issues Anyone primarily targeting nail brittleness — this was the most reliable reported benefit Budget-conscious buyers who want a simple, single-ingredient supplement without extras
65.0
Score
84.0 Value For Money
£8.57
iHerb
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How We Rank Biotin

We analyse user reviews from Amazon UK and other public sources, cross-references ingredient labels and dosage information, checks for third-party testing certifications, and evaluates value for money. Each product is scored 0–100 across evidence-based categories: effectiveness, ingredient quality, value for money, side effects profile, certifications, and an overall weighted score.

Rankings are updated regularly as new reviews and pricing data become available. Products must pass our quality gate (minimum review count and data coverage) to appear on this page.

Frequently Asked Questions

What is the best biotin in 2026? ▼
Biotin 5000µg 50 Vegi Capsules is our top-rated biotin with a score of 76.0/100. Solgar's Biotin 5000µg Vegi Capsules are a high-dose, single-ingredient biotin supplement from one of the UK's most trusted supplement brands. Reviewers consistently praise the product for supporting ...
How are biotin ranked on AIScored? ▼
Our methodology analyses user reviews, ingredient science, effectiveness evidence, third-party testing, and value for money. Each product is scored 0-100 across evidence-based categories, and the overall score determines the ranking. We update rankings regularly as new data becomes available.
Is Biotin 5000µg 50 Vegi Capsules worth the price? ▼
Biotin 5000µg 50 Vegi Capsules scores 74.0/100 for value for money. This represents reasonable value, though there may be cheaper alternatives with similar results. Read full review →
View all Biotin products →

Disclaimer: AIScored provides data-driven rankings based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement. Affiliate links may earn us a commission at no extra cost to you.