B-Complex plus Vitamin C, 100 Tablets
by 21st Century
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At 15mg of thiamin (1,250% RI), 50mg niacin, and 300mg vitamin C per tablet, the dosing here is firmly in therapeutic territory rather than token supplementation. Best for Budget-conscious adults with dietary B-vitamin gaps who want a simple, daily all-in-one tablet and People experiencing fatigue or high stress who need nervous system support without spending on premium brands.
According to the AIScored 0–100 scoring system, B-Complex plus Vitamin C, 100 Tablets by 21st Century scores 68.0/100, ranking #18 out of 19 products in Vitamin C (2026). Strongest category: Value For Money (86.0/100). Weakest: Certifications (40.0/100).
Is B-Complex plus Vitamin C, 100 Tablets worth buying?
“The 21st Century B-Complex Plus Vitamin C scores 72/100 and offers surprisingly good value - 100 tablets means you're sorted for three months with full B-vitamins plus 300mg of Vitamin C. Users report noticeably better energy and less afternoon tiredness, so if you're after a no-frills B-complex without spending a fortune, this one's worth a try.”
What Do Reviewers Say About B-Complex plus Vitamin C, 100 Tablets?
Sample excerpts from currently available source material used in this product analysis.
"Excellent Energy and Immune Support Combination!. I'm very pleased with this B-Complex Plus Vitamin C supplement. It's a fantastic combination of essential B vitamins for boosting energy and metabolism, along with Vitamin C for immune suppo..."
"Amazing brand. I've been using the 21st Century B-Complex Plus Vitamin C for a few months now, and I couldn't be happier! This supplement has truly made a difference in my daily energy levels and overall well-being. Quality: The quality of..."
"Congratulations 🩵💛 Everyone probably already knows that you need to help your body! This is not the first time I choose this supplement for myself and my family. The quality of the brand has been proven by more than one jar. The ingredients..."
"Charge of energy. If stress and bad weather have become a daily occurrence, this is one of the best options to consider, a classic of the genre. An important component in metabolic processes, with disciplined use, a stable nervous system ef..."
"Review. Absolutely amazing product! I noticed a clear difference in my energy and vitality throughout the day. The formula is excellent, especially since it contains vitamin C and folic acid. The quantity is sufficient for a long period, an..."
How does B-Complex plus Vitamin C, 100 Tablets score?
Detailed score breakdown and key findings from our analysis of 50 reviews across 1 source.
Pros
- +High-dose B vitamins — 15mg thiamin and 50mg niacin per tablet — give the formula genuine potency for correcting dietary gaps and supporting energy metabolism
- +300mg vitamin C (333% RI) adds meaningful immune support in a single daily tablet without needing a separate supplement
- +Exceptional value: 100 tablets lasting over three months at a low price, consistently praised across dozens of reviews
- +Small tablets, neutral taste, no stomach irritation when taken with food — practical advantages backed by multiple reviewers
- +Includes folic acid, flagged by several reviewers as a useful addition, particularly for women's health
Cons
- -Uses folic acid rather than methylfolate — people with MTHFR gene variants cannot convert it efficiently, reducing real-world benefit for that group
- -No third-party testing; 'laboratory tested' on the label refers to internal quality control, not independent verification
- -50mg niacin causes flushing and tingling in some users; high riboflavin turns urine bright yellow — harmless, but worth knowing beforehand
- -One reviewer experienced digestive discomfort and found no benefit; high-dose B vitamins don't suit everyone
Best For
Watch Out
- !Niacin flush — temporary skin flushing and tingling — is likely at the 50mg dose; take with food to reduce it
- !Bright yellow urine from high riboflavin (B2) content is expected and harmless, but startling if you're not prepared
- !People with MTHFR mutations should avoid folic acid and seek a methylfolate-based B-complex instead
- !B12 content is not confirmed in the available spec — verify the label directly if B12 deficiency is your main concern
What is B-Complex plus Vitamin C, 100 Tablets?
B-Complex plus Vitamin C, 100 Tablets is a vitamin c product by 21st Century, scoring 68.0/100 on AIScored.
- • Product overview Description Energy Support Vitamin supplement Gluten-free Non-GMO Suitable for Vegans Guaranteed Quality - Laboratory Tested Trusted Quality For Over 30 Years B vitamins are interdependent upon each other and interrelated in function; they help convert food into energy and help maintain the nervous system and body tissues.
- • Suggested use As a vitamin supplement, adults take one (1) tablet daily with any meal or as directed by a healthcare provider.
- • Do not exceed recommended dosage.
- • Other ingredients Cellulose, croscarmellose sodium, stearic acid.
- • Contains <2% of: Gum arabic, magnesium silicate, magnesium stearate,, polyethylene glycol, polyvinyl alcohol, silicon dioxide, titanium dioxide.
- • No added sugar, yeast, preservatives or artificial flavours.
- • Warnings Individual results may vary.
- • Consult a healthcare provider prior to use if pregnant, nursing, on medicines, have a medical condition or are planning a medical procedure.
- • Stop use and contact a physician if adverse reactions occur.
- • Keep out of reach of children.
- • Do not use if product appears to be tampered with or seal is broken.
- • Store in a cool, dry place.
- • Disclaimer While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site.
- • Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed.
- • We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb.
- • This website has been machine translated as a courtesy to customers.
- • iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
- • Supplement information Serving size: one tablet Amount per serving Reference intake % Vitamin C (as ascorbic acid) 300 mg 333% Thiamin (as thiamin mononitrate, B-1) 15 mg 1,250% Riboflavin (vit.
Is B-Complex plus Vitamin C, 100 Tablets Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
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 Vitamin C, 100 Tablets Compare?
See how this product stacks up against the top-rated vitamin c in our database.
| Product | Score | Price |
|---|---|---|
| B-Complex plus Vitamin C, 100 Tablets (this) | 68.0 | £6.63 |
| Garden of Life Vitamin Code Raw ... | 78.0 | £49.99 |
Price History (90 days)
Quick Facts
- Vegan
- No
Frequently Asked Questions
Is B-Complex plus Vitamin C, 100 Tablets worth buying in 2026? ▼
What is the best price for B-Complex plus Vitamin C, 100 Tablets in the UK? ▼
What are the pros and cons of B-Complex plus Vitamin C, 100 Tablets? ▼
Is B-Complex plus Vitamin C, 100 Tablets third-party tested? ▼
How does B-Complex plus Vitamin C, 100 Tablets compare to Garden of Life Vitamin Code Raw B-Complex 120 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.
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