B-Complex Plus
by Thorne
Compare Prices
Thorne B-Complex Plus is a premium B-vitamin supplement distinguished by its use of fully activated, bioavailable forms of all eight B vitamins — including methylcobalamin (B12), methylfolate (5-MTHF), pyridoxal-5-phosphate (B6), and riboflavin-5-phosphate (B2) — making it particularly suited to individuals with MTHFR gene variants or absorption issues. Best for People with MTHFR gene variants and Those with B12 absorption issues or on plant-based diets.
According to the AIScored 0–100 scoring system, B-Complex Plus by Thorne scores 77.0/100, ranking #10 out of 31 products in B Vitamins (2026). Strongest category: Ingredient Quality (91.0/100). Weakest: Value For Money (62.0/100).
Is B-Complex Plus worth buying?
“Thorne B-Complex Plus uses methylated B-vitamin forms that your body absorbs far more efficiently than synthetic versions, which is particularly valuable if you have an MTHFR mutation and can't convert regular folate and B12. Scoring 77/100 and independently verified by NSF for Sport, it's genuinely one of the better researched B-complexes on the market, though you'll pay premium prices for that quality.”
What Do Reviewers Say About B-Complex Plus?
Sample excerpts from currently available source material used in this product analysis.
"Vit C Boost. Great Product to give you more than enough Vit C on a daily basis, highly recommended."
"Seem to be more focused.. I've made a few changes recently so, possibly down to other things too. But seems to he more focused in the daytime. Of course, this could be down to sleeping better since taking the Ashwaganda as well. Either way,..."
"Two days ago I ordered 2 of the new poly Nucs and a couple of sundrie items. Everything arrived very well packaged and within roughly 48 hours of ordering.Whilst the Apivar strips were a few pence dearer than other retailers this was more t..."
"Great service at a busy time.All items arrived and securely packaged. Fantastic communications throughout, really appreciated their time.I see people saying Thornes don't care, this is not our experience when using Thornes, if anything they..."
"Everything is fine but the dispatch and delivery do seem to take longer than reasonable. 2 to 3 weeks from order to delivery seems the norm. Its not a problem if youre not in need of the items. Usually things ordered online take a week at m..."
How does B-Complex Plus score?
Detailed score breakdown and key findings from our analysis of 14 reviews across 2 sources.
Pros
- +Uses active, methylated B-vitamin forms for superior absorption and bioavailability
- +NSF Certified for Sport — independently tested for purity and label accuracy
- +Particularly effective for people with MTHFR mutations who cannot convert synthetic folate/B12
- +Clean formulation — minimal excipients, no unnecessary fillers or artificial colours
- +Thorne has a strong reputation for manufacturing quality and third-party testing
Cons
- -Premium price point — significantly more expensive than standard B-complex supplements
- -High-dose niacin (as niacinamide) may cause GI discomfort in sensitive individuals
- -Available review data for this exact product is sparse and partially from an unrelated company
- -Bright yellow urine from riboflavin is normal but can alarm first-time users
Best For
Watch Out
- !Review data is very limited and partially from an unrelated UK beekeeping company — scores rely heavily on product knowledge
- !High B12 doses (500mcg) exceed daily needs but are generally safe — consult a doctor if on metformin or other B12-interacting medications
- !Not ideal for budget-conscious shoppers — comparable active-form alternatives exist at lower price points
What is B-Complex Plus?
B-Complex Plus is a b vitamins product by Thorne, scoring 77.0/100 on AIScored.
- • Shop Solgar Vitamin B-Complex '50' High Potency Vegetable 100 Capsules at Holland & Barrett today, and discover what it could do for your health & wellness journey.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
How Does B-Complex Plus Compare?
See how this product stacks up against the top-rated b vitamins in our database.
| Product | Score | Price |
|---|---|---|
| B-Complex Plus (this) | 77.0 | £0.00 |
| Active Folic 60 Capsules | 80.0 | £12.99 |
Price History (90 days)
Frequently Asked Questions
Is B-Complex Plus worth buying in 2026? ▼
What are the pros and cons of B-Complex Plus? ▼
How does B-Complex Plus compare to Active Folic 60 Capsules? ▼
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
What Are Other Top B Vitamins?
Other top-rated b vitamins you might want to compare.
Feedback & Suggestions
Spotted an issue? Wrong price, incorrect data, or something else off? Let us know and we'll fix it.
Missing a product you'd like us to review? Tell us the product name and we'll consider adding it.