Best Vitamins UK — 2026 Guide
Essential vitamins including D3, B-complex, C, K2, and multivitamins. Compare prices, forms, and AI-generated reviews across UK retailers.
We analysed 12 vitamins by aggregating real user reviews from Reddit, Amazon UK, YouTube, and specialist health forums. Our AI evaluates each product across six categories — effectiveness, ingredient quality, value for money, side effects, certifications, and overall score — so you can make an informed decision without spending hours reading individual reviews.
How We Compare Vitamins
We collect public reviews from Reddit, Amazon, YouTube, Trustpilot, and specialist forums to build a complete picture.
Our AI reads every review, checks ingredient labels, fillers, and certifications, then generates an unbiased summary.
Products are scored 1-10 across six evidence-based categories, making it easy to compare at a glance.
12 products
BetterYou Vitamin D3 3000IU Daily Oral Spray 15ml
BetterYou
BetterYou D3 3000IU Spray is a well-designed UK-made product that offers genuine convenience and potentially superior ab...
Holland & Barrett Vitamin D3 4000 IU (100mcg) Tablets - 120 Count
Holland & Barrett
Holland & Barrett's Vitamin D3 4000IU is a functional, affordable option that delivers an effective dose at the lowest p...
Life Extension Two-Per-Day Multivitamin - 120 Tablets
Life Extension
Life Extension Two-Per-Day is arguably the best-value research-grade multivitamin available in the UK market, offering d...
MyProtein Alpha Men Super Multivitamin - 120 Tablets
MyProtein
MyProtein Alpha Men is the entry-level option for budget-conscious gym-goers who want broad-spectrum multivitamin covera...
NOW Foods MK-7 Vitamin K-2 100mcg - 60 Veg Capsules
NOW Foods
NOW Foods MK-7 Vitamin K2 100mcg is a well-formulated standalone K2 product using the clinically validated MenaQ7 form. ...
NOW Foods Vitamin C-1000 with Rose Hips & Bioflavonoids - 250 Tablets
NOW Foods
NOW Foods Vitamin C-1000 with Rose Hips and Bioflavonoids is one of the best-value vitamin C products available in the U...
NOW Foods Vitamin D-3 5000 IU (125mcg) Softgels - 240 Count
NOW Foods
NOW Foods Vitamin D3 5000 IU represents arguably the best combination of quality, potency, and value in the UK vitamin D...
Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml
Nutri Advanced
Nutri Advanced D3 with K2 is a thoughtfully formulated practitioner-grade product that combines two synergistic nutrient...
Optimum Nutrition Opti-Men Multivitamin - 150 Tablets
Optimum Nutrition
Optimum Nutrition Opti-Men is a popular sports multivitamin with an impressive 75+ ingredient count, though the propriet...
Solgar Vitamin C 1000mg with Rose Hips - 100 Tablets
Solgar
Solgar Vitamin C 1000mg with Rose Hips is a solid, trustworthy product from one of the supplement industry's most establ...
Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count
Solgar
Solgar Vitamin D3 1000 IU is a reliable, well-formulated product from one of the most respected supplement brands global...
Thorne Basic B Complex - 60 Capsules
Thorne
Thorne Basic B Complex is the gold standard for bioactive B-vitamin supplementation, using tissue-ready forms throughout...
Vitamins Buying Guide — What to Look For
Choosing the right vitamins can be overwhelming with hundreds of options on the UK market. Here are the key factors our AI analyses when scoring each product:
Bioavailability & Forms
Not all supplement forms are created equal. For example, magnesium glycinate absorbs much better than magnesium oxide. We check which forms are used and whether they're backed by research for optimal absorption.
Clean Label & Fillers
Many supplements contain unnecessary fillers, artificial colours, added sugars, and bulking agents. Our AI flags products with excessive additives and rewards clean formulations.
Third-Party Testing
Independent lab testing verifies that what's on the label is actually in the bottle. Products with third-party certifications (NSF, USP, Informed Sport) score higher in our rankings.
Value per Serving
The cheapest bottle isn't always the best value. We calculate the cost per serving and weigh it against ingredient quality, dosage, and overall effectiveness reported by users.
How Our Scoring Works
Each product is scored 1-10 across six categories. An overall score of 8+ indicates a product we'd recommend to most people. Scores of 6-7 are solid choices with some trade-offs, while anything below 6 has significant drawbacks reported by users. Our scores are recalculated regularly as new reviews come in.
Frequently Asked Questions
Where do you get your reviews?
We aggregate publicly available reviews from Reddit, Amazon UK, YouTube, Trustpilot, and specialist health forums. We never use manufacturer-provided testimonials.
How often are scores updated?
Our AI re-analyses reviews and updates scores regularly. Product pages show the date of the latest analysis.
Do you receive products for free?
No. AIScored does not accept free products or sponsored placements. Our revenue comes from affiliate links, which do not influence our scores.
Disclaimer: AIScored provides AI-generated summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Prices are updated regularly but may differ at the time of purchase. Affiliate links may earn us a commission at no extra cost to you.