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B-50

NOW
4.7
★ ★ ★ ★ ★
(4754 ratings)
PABA 50 mg
Vitamin B6 50 mg
Niacin 50 mg
Thiamin 50 mg
Riboflavin 50 mg
Choline 50 mg
Vitamin B5 50 mg
Product Image
Score76
Complete and economical B-vitamin coverage is offset by conventional forms and a 50 mg vitamin B6 dose that is too aggressive for routine long-term use.
How scoring works
Quantity:100 Tablet(s) • (100 servings)
Goals:
Energy
Metabolism Boost

Score 76

Complete and economical B-vitamin coverage is offset by conventional forms and a 50 mg vitamin B6 dose that is too aggressive for routine long-term use.
How scoring works

Also available as

1 option
250 servings 1 Tablet(s) • 250 Tablet(s) • 250 servings $25.50 ($0.10 per serving)
$11.60($0.11 per serving)
Vitacost
$ 13.45
Amazon
$ 11.60
iHerb
$ 12.24
Daily Vita
$ 11.60
Report prices

Analysis

Thiamine, riboflavin, niacinamide, vitamin B6, folate, vitamin B12, biotin, and pantothenic acid create broad support for normal energy metabolism. Most core B vitamins are supplied at 50 mg or a similarly high multiple of daily needs, so the formula is better described as high potency than balanced maintenance nutrition.

Pyridoxine hydrochloride and cyanocobalamin are conventional forms that require conversion before use. Choline at 50 mg is only a small addition, and PABA and inositol provide limited practical depth beside the main B vitamins.

Folate at 667 mcg DFE is clearly stated and provides substantial coverage. The simple serving and complete disclosure support ease of use, but the dose pattern is more aggressive than most adults need every day.

Who is it for
  • Adults seeking a high-potency B-complex for limited or clinician-directed use
  • People who value a simple once-daily serving
  • Users who have checked total vitamin B6 and folic acid intake from other products
Best for
  • Broad B-vitamin coverage
  • Supporting normal energy metabolism when intake is inadequate
  • Users prioritizing low serving cost over premium coenzyme forms

Pros

  • Includes all core B vitamins with stated amounts
  • Uses non-flushing niacinamide
  • Provides substantial thiamine, riboflavin, and pantothenic acid
  • Simple daily serving is easy to follow

Cons

  • 50 mg pyridoxine is unnecessarily high for a daily maintenance formula
  • Uses conventional cyanocobalamin and pyridoxine hydrochloride
  • Choline is modest at 50 mg
  • PABA and inositol add little to the core energy rationale

Warnings

  • Prolonged use of 50 mg vitamin B6 may cause tingling, numbness, or other nerve symptoms; stop use and seek advice if these occur.
  • Niacinamide at this amount may cause nausea or stomach discomfort in sensitive users.
  • PABA can interfere with sulfonamide antibiotics, so concurrent use should be reviewed with the prescriber.

Nutrient quality

73 High impact

The broad B-vitamin pattern provides substantial, focused coverage. Basic forms and an aggressive B6 amount reduce form quality and long-term balance.

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Ingredient transparency

71 High impact

Active amounts are broadly disclosed without a hidden blend. Repeated vitamin names, missing directions, and absent tablet excipients reduce full clarity.

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Customer satisfaction

70 High impact

The aggregate satisfaction signal is strong and supported by extensive volume. Missing review details prevent assessment of recurring complaints or purpose fit.

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Value for money

93 Highest impact

Broad dosing and a low serving cost provide excellent supply value. Basic forms and high B6 are the main trade-offs against gentler competitors.

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Goals

Energy
Energy
Impact
Highest effect
A- Goal FitB+ Strength of SupportC+ CoverageA Formula Quality
Vitamin B5 · 50 mgRiboflavin · 50 mgThiamin · 50 mgVitamin B12 · 50 mcg

A full high-potency B-complex directly supports carbohydrate metabolism and the enzyme systems involved in cellular energy production. The focused design is most relevant when intake is inadequate and does not provide an immediate stimulant effect.

Amounts are clearly disclosed, although several vitamins use standard forms that require conversion in the body. Prolonged daily intake of the high vitamin B6 amount may cause tingling, numbness, or other nerve symptoms.

Metabolism Boost
Metabolism Boost
Impact
High effect
B- Goal FitB- Strength of SupportD+ CoverageA- Formula Quality
Biotin · 50 mcgNiacin · 50 mgVitamin B12 · 50 mcgRiboflavin · 50 mgThiamin · 50 mgVitamin B5 · 50 mgVitamin B6 · 50 mg

High-potency B vitamins provide a focused set of cofactors for normal cellular energy production. The formula is most relevant when low B-vitamin status is impairing energy metabolism.

No thyroid nutrient, chromium, thermogenic, carnitine, or substantial mitochondrial active broadens the effect. Long-term daily use of the supplied B6 amount may cause tingling, numbness, or other nerve symptoms.

Study evidence
Vitamin B6 Supportive 16 studies

Ingredients

IngredientAmount per serving
Thiamine (Thiamine Hydrochloride, Vitamin B1)
 50 mg
Riboflavin (Vitamin B2)
 50 mg
Niacin (Niacinamide, Vitamin B3)
 50 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 50 mg
Folate
667 mcg DFE
Vitamin B12 (Cyanocobalamin)
 50 mcg
Biotin
50 mcg
Pantothenic Acid (Calcium Pantothenate)
 50 mg
Choline (Choline Bitartrate)
 50 mg
PABA
50 mg
Inositol
50 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Vegetarian
Report overview
PABA · 50 mg OverallScore91
A Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA- Value

PABA is clearly named in a standard form, though no pharmaceutical-grade or high-purity claim is supplied, and the delivery format suits the dose. The clearly disclosed 50 mg amount suits a high-potency B-complex, and no targeted additives appear in the supplied ingredient data. PABA-specific cost efficiency is favorable within the broader formula.

View ingredientView products
Vitamin B6 (Pyridoxine Hydrochloride) · 50 mg OverallScore86
C+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Pyridoxine hydrochloride is less direct than active P-5-P, though included riboflavin may support conversion. The 50 mg dose fits the preferred range and comes in one tablet. The broad B-complex is very economical despite using the synthetic B6 precursor.

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Niacin (Niacinamide, Vitamin B3) · 50 mg OverallScore81
B- Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyA- Value

Niacinamide supports general vitamin use, though it is not the form used for lipid-focused goals. The amount fits the usual range for a B-complex, and the broader formula adds nutritional context. Value is strong for the full formula, while specialized release details and a no-flush statement are not provided.

View ingredientView products
Loading alternative details
81 Performance

Coenzyme B-Complex Caps

Country Life
<p>It improves ingredient-form quality through multiple coenzyme vitamin forms and meaningful amounts that improve form quality. Vitamin B6 remains elevated and choline is modest, so prolonged daily use still warrants caution.</p>
76 Performance

Megasorb B-Complex '50'

Solgar
<p>It improves ingredient-form quality through active riboflavin and vitamin B6 forms that improve the standard B-complex base. The dose profile remains aggressive, and long-term high vitamin B6 intake may raise the risk of nerve symptoms.</p>
74 Performance

Super B-50

NaturesPlus
<p>It improves ingredient-form quality through methylfolate and methylcobalamin alongside broad B-vitamin coverage. High pyridoxine is poorly suited to casual long-term use, while choline and biotin remain modest.</p>
77 Budget

B-50

NOW
<p>It lowers the recurring cost while providing broad, clearly listed B-vitamin coverage and a large supply. The forms are mostly conventional, and the high vitamin B6 amount is not appealing for indefinite daily use.</p>
74 Budget

B-Complex '50'

Solgar
<p>It lowers the recurring cost while providing a complete B-vitamin pattern that directly supports energy metabolism. Conventional forms, high vitamin B6, and a tiny herbal blend limit the quality upgrade.</p>
77 Budget

B-50 Complex 50 mg

Source Naturals
<p>No eligible candidate is priced below the original at this cost level, but this is among the nearest low-cost choices and provides broad metabolic coverage with clearly stated amounts and substantial pantothenic acid. High folic acid and vitamin B6 reduce dose balance for routine long-term use.</p>
77 Value

B-50 Complex

Nature's Way
<p>It balances formulation quality and cost through active riboflavin and a broad, clearly dosed B-complex base. Vitamin B6 remains unnecessarily high for routine long-term use.</p>
75 Value

B-50 Complex 50 mg

Source Naturals
<p>It balances formulation quality and cost through full B-complex coverage with particularly favorable serving value. Basic forms and high vitamin B6 and folic acid amounts limit long-term suitability.</p>
75 Value

B-Complex 50

Bluebonnet
<p>It balances formulation quality and cost through a complete B-vitamin pattern with clear amounts and reasonable serving value. The formula still uses basic forms and a high vitamin B6 amount.</p>
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Influence of thiamin supplementation on the health and general well-being of an elderly Irish population with marginal thiamin deficiency.
    Smidt LJ; Cremin FM; Grivetti LE; Clifford AJ · Journal of gerontology · 1991
    Randomized trial80 participantsEnergy forThiamin
  2. Vitamin B status in patients with chronic fatigue syndrome.
    Heap LC; Peters TJ; Wessely S · Journal of the Royal Society of Medicine · 1999
    Case-control study30 participantsEnergy forRiboflavin Energy forThiamin
  3. High-dose oral thiamine versus placebo for chronic fatigue in patients with primary biliary cholangitis: A crossover randomized clinical trial.
    Bager P; Bossen L; Gantzel R; Grønbæk H · PloS one · 2024
    Randomized trial36 participantsEnergy forThiamin
  4. Thiamine deficiency-related brain dysfunction in chronic liver failure.
    Butterworth RF · Metabolic brain disease · 2009
    Narrative reviewEnergy forThiamin
  5. Physicochemical properties of and volatile compounds in riboflavin fortified cloudy apple juice; study of its effect on job fatigue among Egyptian construction workers.
    Fouad S; Ibrahim GE; Hussein AMS; Ibrahim FA; El Gendy A · Heliyon · 2021
    Non-randomized trialEnergy forRiboflavin
  6. B-vitamins, related vitamers, and metabolites in patients with quiescent inflammatory bowel disease and chronic fatigue treated with high dose oral thiamine.
    Bager P; Hvas CL; Hansen MM; Ueland P; Dahlerup JF · Molecular medicine (Cambridge, Mass.) · 2023
    Observational studyEnergy forRiboflavin
  7. The differential impact of three different NAD+ boosters on circulatory NAD and microbial metabolism in humans.
    Christen S; Redeuil K; Goulet L; Giner MP; Breton I; Rota R; Frézal A; Nazari A; Van den Abbeele P; Godin JP; Nutten S; Cuenoud B · Nature metabolism · 2026
    Randomized trial65 participantsMetabolism Boost forNiacin
  8. Effects of NAD+ precursor supplementation on glucose and lipid metabolism in humans: a meta-analysis.
    Zhong O; Wang J; Tan Y; Lei X; Tang Z · Nutrition & metabolism · 2022
    Meta-analysis14,750 participants40 studies pooledMetabolism Boost forNiacin
  9. Lipid-lowering therapies, glucose control and incident diabetes: evidence, mechanisms and clinical implications.
    Zafrir B; Jain M · Cardiovascular drugs and therapy · 2015
    Narrative reviewMetabolism Boost forNiacin
  10. Changes in glucose metabolism, C-reactive protein, and liver enzymes following intake of NAD + precursor supplementation: a systematic review and meta-regression analysis.
    Sohouli MH; Tavakoli S; Reis MG; Hekmatdoost A; Guimarães NS · Nutrition & metabolism · 2024
    Meta-analysis9,256 participants45 studies pooledMetabolism Boost forNiacin
  11. Neurological, Psychiatric, and Biochemical Aspects of Thiamine Deficiency in Children and Adults.
    Dhir S; Tarasenko M; Napoli E; Giulivi C · Frontiers in psychiatry · 2026
    Narrative reviewMetabolism Boost forThiamin
  12. Insights Into Thiamine Supplementation in Patients With Septic Shock.
    Costa NA; Pereira AG; Sugizaki CSA; Vieira NM; Garcia LR; de Paiva SAR; Zornoff LAM; Azevedo PS; Polegato BF; Minicucci MF · Frontiers in medicine · 2022
    Narrative reviewMetabolism Boost forThiamin
  13. Thiamine-dependent processes and treatment strategies in neurodegeneration.
    Gibson GE; Blass JP · Antioxidants & redox signaling · 2007
    Narrative reviewMetabolism Boost forThiamin
  14. High-resolution plasma metabolomics and thiamine status in critically Ill adult patients.
    Gundogan K; Nellis MM; Ozer NT; Ergul SS; Sahin GG; Temel S; Yuksel RC; Teeny S; Alvarez JA; Sungur M; Jones DP; Ziegler TR · Metabolomics : Official journal of the Metabolomic Society · 2024
    Cross-sectional study76 participantsMetabolism Boost forThiamin
  15. Plasma vitamin B6 vitamers before and after oral vitamin B6 treatment: a randomized placebo-controlled study.
    Bor MV; Refsum H; Bisp MR; Bleie Ø; Schneede J; Nordrehaug JE; Ueland PM; Nygard OK; Nexø E · Clinical chemistry · 2003
    Randomized trial90 participantsMetabolism Boost forVitamin B6
  16. Pyridoxine challenge reflects pediatric hypophosphatasia severity and thereby examines tissue-nonspecific alkaline phosphatase's role in vitamin B6 metabolism.
    Whyte MP; Zhang F; Mack KE; Wenkert D; Gottesman GS; Ericson KL; Cole JT; Coburn SP · Bone · 2024
    Non-randomized trial149 participantsMetabolism Boost forVitamin B6
  17. Vitamin B6 requirements of women using oral contraceptives.
    Leklem JE; Brown RR; Rose DP; Linkswiler HM · The American journal of clinical nutrition · 1975
    Non-randomized trial24 participantsMetabolism Boost forVitamin B6
  18. Double-blind trial of pyridoxine (vitamin B6) in the treatment of steroid-dependent asthma.
    Sur S; Camara M; Buchmeier A; Morgan S; Nelson HS · Annals of allergy · 1993
    Randomized trial31 participantsMetabolism Boost forVitamin B6
  19. Anaemia during pregnancy: could riboflavin deficiency be implicated?
    Duffy B; McNulty H; Ward M; Pentieva K · The Proceedings of the Nutrition Society · 2026
    Narrative reviewMetabolism Boost forRiboflavin
  20. Riboflavin and riboflavin-derived cofactors in adolescent girls with anorexia nervosa.
    Capo-chichi CD; Guéant JL; Lefebvre E; Bennani N; Lorentz E; Vidailhet C; Vidailhet M · The American journal of clinical nutrition · 1999
    Clinical trial34 participantsMetabolism Boost forRiboflavin
  21. Disorders of flavin adenine dinucleotide metabolism: MADD and related deficiencies.
    Mereis M; Wanders RJA; Schoonen M; Dercksen M; Smuts I; van der Westhuizen FH · The international journal of biochemistry & cell biology · 2024
    Systematic reviewMetabolism Boost forRiboflavin
  22. Apolipoprotein E and sex modulate fatty acid metabolism in a prospective observational study of cognitive decline.
    González-Domínguez R; Castellano-Escuder P; Lefèvre-Arbogast S; Low DY; Du Preez A; Ruigrok SR; Lee H; Helmer C; Pallàs M; Urpi-Sarda M; Sánchez-Pla A; Korosi A; Lucassen PJ; Aigner L; Manach C; Thuret S; Samieri C; Andres-Lacueva C · Alzheimer's research & therapy · 2022
    Observational studyMetabolism Boost forVitamin B5
  23. Physiological and performance responses to supplementation with thiamin and pantothenic acid derivatives.
    Webster MJ · European journal of applied physiology and occupational physiology · 1998
    Randomized trial6 participantsMetabolism Boost forVitamin B5
  24. Pantothenate synthetase is essential but not limiting for pantothenate biosynthesis in Arabidopsis.
    Jonczyk R; Ronconi S; Rychlik M; Genschel U · Plant molecular biology · 2008
    OtherMetabolism Boost forVitamin B5
  25. Exploring auxotrophy and engineering vitamin B6 prototrophy in the acetogen Clostridium sp. AWRP.
    Kwon SJ; Lee J; Lee HS · Applied and environmental microbiology · 2024
    Clinical trialMetabolism Boost forVitamin B5
  26. Dietary one-carbon metabolism nutrients and risk of MASLD progression: a prospective cohort study.
    Shen L; Wang K; Li R; Li Y; Guo Y; Li F; Yuan J; Yang Z; Xia B; Lin X · European journal of clinical nutrition · 2026
    Cohort study46,800 participantsMetabolism Boost forVitamin B6
  27. Associations of Vitamin B6 Intake and Plasma Pyridoxal 5'-Phosphate with Plasma Polyunsaturated Fatty Acids in US Older Adults: Findings from NHANES 2003-2004.
    Kim H; Enrione EB; Narayanan V; Li T; Campa A · Nutrients · 2022
    Cross-sectional study461 participantsMetabolism Boost forVitamin B6
  28. Influence of oral contraceptives, pyridoxine (vitamin B6), and tryptophan on carbohydrate metabolism.
    Adams PW; Wynn V; Folkard J; Seed M · Lancet (London, England) · 1976
    Clinical trial46 participantsMetabolism Boost forVitamin B6
  29. Effect of oral contraceptives and vitamin B6 deficiency on carbohydrate metabolism.
    Rose DP; Leklem JE; Brown RR; Linkswiler HM · The American journal of clinical nutrition · 1975
    Clinical trialMetabolism Boost forVitamin B6