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B-100 Complex

Nature Made
4.6
★ ★ ★ ★ ★
(57 ratings)
Thiamin 100 mg
Niacin 100 mg
Riboflavin 100 mg
Vitamin B5 100 mg
Vitamin B6 100 mg
Product Image
Score66
Complete B-100 coverage is offset by an excessive pyridoxine amount and basic forms. It is not a sensible everyday energy or metabolism supplement.
How scoring works
Quantity:60 Tablet(s) • (60 servings)
Goals:
Energy
Metabolism Boost

Score 66

Complete B-100 coverage is offset by an excessive pyridoxine amount and basic forms. It is not a sensible everyday energy or metabolism supplement.
How scoring works
$14.59($0.24 per serving)
Walmart
$ 15.10
Vitacost
$ 14.59
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Analysis

Thiamine, riboflavin, niacinamide, B6, B12, biotin, and pantothenic acid are all supplied at 100-level amounts, with 665 mcg DFE of folate. The formula is complete and clearly quantified.

Thiamine mononitrate, pyridoxine hydrochloride, and cyanocobalamin are conventional forms. High potency therefore does not reflect premium delivery or better biochemical forms.

A 100 mg vitamin B6 serving is the overriding concern because sustained intake can injure peripheral nerves. The product is only reasonable for a defined, time-limited need under professional guidance.

Who is it for
  • Adults with a professionally defined high-potency need
  • People using a B-100 formula for a limited period
  • Users able to avoid other B6 sources
Best for
  • Supervised high-potency B supplementation
  • Short-term B-vitamin repletion
  • One-tablet B-100 coverage

Pros

  • Includes every core B vitamin
  • Clearly states all nutrient amounts
  • Uses niacinamide
  • Requires one tablet per serving

Cons

  • Contains 100 mg of pyridoxine
  • Uses cyanocobalamin
  • Folate exposure is high
  • Provides no choline or active-form upgrades

Warnings

  • The 100 mg vitamin B6 amount may cause tingling, numbness, balance problems, or other nerve symptoms with prolonged use.
  • Do not combine it with other B6 supplements unless total intake is clinically managed.
  • The high folate amount makes additional folic acid supplementation unnecessary for most users.

Nutrient quality

55 Moderate impact

The formula relies on thiamine mononitrate, pyridoxine hydrochloride, cyanocobalamin, and several unspecified forms. The very high vitamin B6 amount creates a substantial neuropathy concern with long-term use.

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Ingredient transparency

84 Highest impact

Specific amounts are supplied for every listed active ingredient. No proprietary blend hides the listed doses.

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Customer satisfaction

63 Moderate impact

The supplied aggregate rating is strong. No complaint themes or purpose-specific experience details are supplied.

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Value for money

55 Moderate impact

Quality or dose limitations weaken the premium position. Added calcium contributes little to the core B-vitamin purpose.

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Goals

Energy
Essential Energy Nutrients
Energy
Impact
High effect
A- Goal FitC+ Strength of SupportC+ CoverageC+ Formula Quality
Vitamin B5 · 100 mgRiboflavin · 100 mgThiamin · 100 mgVitamin B12 · 100 mcg

A full B-complex supplies cofactors needed to turn carbohydrate, fat, and protein into usable energy. The formula can help fatigue when a B-vitamin deficiency is present.

Uniformly high amounts do not create stimulant energy, and the 100 mg vitamin B6 amount is unsuitable for indefinite routine use because chronic excess can injure nerves. Cyanocobalamin and pyridoxine are also less direct forms than available active alternatives.

Metabolism Boost
Metabolic B-Vitamins
Metabolism Boost
Impact
High effect
C- Goal FitB- Strength of SupportC- CoverageA- Formula Quality
Biotin · 100 mcgNiacin · 100 mgVitamin B12 · 100 mcgRiboflavin · 100 mgThiamin · 100 mgVitamin B5 · 100 mgVitamin B6 · 100 mg

High-potency B vitamins support normal cellular energy pathways but do not directly stimulate thermogenesis. The focused formula offers substantial cofactor depth without thyroid, glycemic, or mitochondrial-specialty actives.

Most amounts and standard forms are clearly disclosed. Daily vitamin B6 at the listed amount reaches a high chronic exposure and may raise neuropathy risk with long-term use.

Study evidence
Vitamin B6 Supportive 16 studies

Ingredients

IngredientAmount per serving
Thiamine (Thiamine Mononitrate)
 100 mg
Riboflavin
100 mg
Niacin (Niacinamide)
 100 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 100 mg
Folate
665 mcg DFE
Vitamin B12 (Cyanocobalamin)
 100 mcg
Biotin
100 mcg
Pantothenic Acid (D-Calcium Pantothenate)
 100 mg
Calcium (Dibasic Calcium Phosphate)
 70 mg
Gluten Free Adults 18–50
Report overview
Thiamin (Thiamine Mononitrate) · 100 mg OverallScore88
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The serving supplies 100 mg of thiamin as thiamine mononitrate within a high-potency B-complex. The amount reaches the high-potency range used for targeted metabolic or neurological support. A low serving cost and substantial dose make the active economically efficient.

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Niacin (Niacinamide) · 100 mg OverallScore78
B- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyC Value

niacinamide is a reasonable form for a general multivitamin or B-complex without a specialized NAD-plus claim. The 100 mg serving fits the effective range for the disclosed form. The serving cost is acceptable for a high-potency B-complex.

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Riboflavin · 100 mg OverallScore74
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Standard riboflavin requires enzymatic conversion before it becomes metabolically active. The 100 mg dose provides high-potency metabolic support within the specified effective range. Value is excellent because a very low serving cost delivers a high-potency dose.

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Loading alternative details
85 Performance

B-Complex Plus

Pure Encapsulations
The ingredient profile is a stronger or better-balanced alternative to the original B-complex. Methylfolate, methylcobalamin, P-5-P, and activated riboflavin create a focused, well-balanced B-complex. Elevated niacin still deserves attention, but the restrained vitamin B6 amount and large package support strong routine value.
80 Performance

B-Complex '100'

Solgar
The ingredient profile is a stronger or better-balanced alternative to the original B-complex. A broad high-potency B-vitamin profile supports normal energy metabolism, but most forms are conventional and several amounts greatly exceed routine needs. The vitamin B6 serving reaches the chronic-use safety ceiling and may cause nerve damage with prolonged use, making unsupervised daily supplementation a poor fit.
79 Performance

B-100 Complex

21st Century
The ingredient profile is a stronger or better-balanced alternative to the original B-complex. A broad high-potency B-vitamin profile supports normal energy metabolism, but most forms are conventional and several amounts greatly exceed routine needs. The vitamin B6 serving reaches the chronic-use safety ceiling and may cause nerve damage with prolonged use, making unsupervised daily supplementation a poor fit.
74 Budget

B 50 Complex

Spring Valley
The lower serving cost makes this a more economical way to cover overlapping B vitamins. A low-cost B-complex supplies substantial nominal amounts across the core vitamins. Missing chemical forms make absorption, flushing potential, and long-term safety harder to assess, especially with the high vitamin B6 amount.
77 Budget

B-50

NOW
The lower serving cost makes this a more economical way to cover overlapping B vitamins. A large supply offers broad B-vitamin dosing at excellent serving value. Basic forms and a high vitamin B6 amount remain important limitations for long-term daily use.
80 Budget

B-Complex '100'

Solgar
The lower serving cost makes this a more economical way to cover overlapping B vitamins. A broad high-potency B-vitamin profile supports normal energy metabolism, but most forms are conventional and several amounts greatly exceed routine needs. The vitamin B6 serving reaches the chronic-use safety ceiling and may cause nerve damage with prolonged use, making unsupervised daily supplementation a poor fit.
78 Value

B-50 Complex

21st Century
The combination of formulation quality and serving cost provides better practical value than the original. A budget B-complex provides substantial core B-vitamin amounts with clear active disclosure and a long supply. Conventional forms and a high vitamin B6 amount limit its fit for unsupervised long-term daily use.
77 Value

Vitamin B Complex

California Gold Nutrition
The combination of formulation quality and serving cost provides better practical value than the original. Active riboflavin and vitamin B6 forms improve this compact B-complex, while pantothenic acid and folate add useful coverage. Duplicate niacin, vitamin B6, and biotin entries make the actual totals unclear, and the vitamin B6 exposure may be high for sustained use.
77 Value

B-50

NOW
The combination of formulation quality and serving cost provides better practical value than the original. Broad B-vitamin dosing and a large supply create excellent value for energy metabolism. Basic forms and the high vitamin B6 amount reduce suitability for indefinite daily use.
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Sources

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

  1. 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
  2. Effect of intravenous thiamine administration on critically ill patients: A systematic review and meta-analysis of randomized controlled trials.
    Nakanishi N; Abe Y; Matsuo M; Tampo A; Yamada K; Hatakeyama J; Yoshida M; Yamamoto R; Higashibeppu N; Nakamura K; Kotani J · Clinical nutrition (Edinburgh, Scotland) · 2024
    Meta-analysis3,494 participants35 studies pooledMetabolism Boost forThiamin
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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