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B-100 Complex

21st Century
4.7
★ ★ ★ ★ ★
(4966 ratings)
Thiamin 100 mg
Niacin 100 mg
Riboflavin 100 mg
Vitamin B5 100 mg
Vitamin B6 100 mg
Product Image
Score93

A very affordable, high-potency B-complex tablet for basic energy and metabolic support.

How scoring works
Quantity:60 Tablet(s) • (60 servings)
Goals:
Metabolism Boost
Energy
General Health

Score 93

A very affordable, high-potency B-complex tablet for basic energy and metabolic support.

How scoring works

Also available as

1 option
50 mg • 60 Tablet(s) servings B6 50 mg, B1 50 mg +2 more • 60 Tablet(s) • 60 servings $5.37 ($0.08 per serving)
$9.49($0.15 per serving)
Pure Formulas
$ 10.06
iHerb
$ 9.49
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Analysis

This B-100 complex is all about affordability and high dosage. It provides 100mg of most B vitamins, which can really help support your metabolism and daily energy levels. While it uses basic synthetic forms, it's a very practical way to get the foundational nutrients your body needs to handle stress.

I like that it adds a bit of calcium to the mix, which helps stabilize the tablets. It fits best for someone who isn't sensitive to synthetic vitamins and wants a simple daily supplement. It's a straightforward, no-frills product that gets the job done for a very low price.

Pros

  • Excellent price per serving
  • Provides 100mg of most B vitamins
  • Simple, daily one-tablet serving
  • Includes extra calcium for stability

Cons

  • Uses basic synthetic forms only
  • May have artificial dyes or coatings
  • Low bioavailability for some ingredients

Warnings

  • Tablets might be large and hard to swallow
  • High niacin dose can cause temporary skin redness
  • Not recommended for those with absorption issues

Nutrient quality

81 Highest impact

Every B-vitamin is present in a high-potency 100mg/mcg dose, providing broad support for metabolic pathways. While standard synthetic forms are used, the dosages are material and aligned with general wellness goals.

Ingredient transparency

98 Highest impact

The label provides specific amounts for every active ingredient, allowing for an accurate assessment of formula potency. Labeling is straightforward, although the chemical forms are listed clearly for technical review.

Customer satisfaction

95 Highest impact

The product has earned a strong rating from thousands of reviews, confirming its reliability as a budget-friendly option. Users frequently mention improved energy levels and the excellent price-to-potency ratio.

Value for money

99 Highest impact

At 15 cents per serving, this complex offers outstanding value for a high-potency B-100 formula. The extremely low cost makes it a very attractive choice for long-term daily supplementation.

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Goals

Metabolism Boost
Impact
Highest effect
A- Goal FitA- Strength of SupportB- CoverageA+ Formula Quality

This B-100 complex delivers potent doses of essential vitamins that support the body's natural enzymatic energy production. Ingredients like thiamine and riboflavin are necessary for metabolizing macronutrients into cellular energy.

The inclusion of calcium carbonate and dicalcium phosphate likely serves as stabilizers for the tablet format. While providing excellent enzymatic support for cellular energy, the formula lacks direct thermogenic or thyroid-stimulating agents.

View goal →
Energy
Impact
Highest effect
A+ Goal FitB Strength of SupportB- CoverageA- Formula Quality

A high-potency B-complex is utilized to provide the enzymatic cofactors required for energy metabolism.

While potently dosed, the use of basic chemical forms and hard tablets may affect biological availability.

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Ingredients

IngredientAmount per serving
Vitamin B1 (Thiamine Mononitrate)
 100 mg
Vitamin B2 (Riboflavin)
 100 mg
Niacin (Niacinamide)
 100 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 100 mg
Folate
667 mcg DFE
Vitamin B12 (Cyanocobalamin)
 100 mcg
Biotin
100 mcg
Pantothenic Acid (D-Calcium Pantothenate)
 100 mg
Calcium (Calcium Carbonate, Dicalcium Phosphate)
 160 mg
Gluten Free Adults 18–50
Report overview
Thiamin (Thiamine Mononitrate) · 100 mg OverallScore88
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
This high-potency B-complex tablet includes a 100mg dose of thiamin mononitrate to aid metabolic health. It is a budget-friendly option for comprehensive B-vitamin supplementation.
View ingredientView products
Niacin (Niacinamide) · 100 mg OverallScore84
B+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC Value
This B-100 complex provides a reliable 100mg of niacinamide as part of a complete B-vitamin profile. It is a straightforward, budget-friendly option for daily metabolic and energy support.
View ingredientView products
Riboflavin · 100 mg OverallScore70
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value
21st Century's B-100 Complex provides 100mg of riboflavin for a very low price. While it offers high potency, the tablet format and likely use of synthetic additives are notable weaknesses.
View ingredientView products
94 Value

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94 Value

B-Complex '100'

Solgar
4.7
★★★★★
(30183 ratings)
Offering a much higher reputation for quality while maintaining a nearly identical price per serving makes this a clear value upgrade. Capsule delivery of the full 100mg B-complex spectrum provides reliable support for daily metabolic health.
Other sellers (3)
95 Value

B-Complex 50

Solaray
4.7
★★★★★
(7579 ratings)
High-count vegetarian capsules provide a transparent and balanced approach that represents excellent long-term value for general wellness. It pairs consistent B-vitamin doses with essential cofactors like choline bitartrate for better systemic support.
Other sellers (1)
95 Value

B-50 Complex 50 mg

Source Naturals
4.7
★★★★★
(5466 ratings)
Inclusion of high-dose vitamin B5 and extra choline bitartrate provides a more complete support profile at a very competitive price. This formula offers a robust B-50 matrix that addresses broader health goals for every dollar spent.
Other sellers (2)
93 Performance

Coenzyme B-Complex Advanced

Country Life
4.8
★★★★★
(3230 ratings)
Replacing standard synthetic vitamins with active coenzymes like P5P and methyl B12 ensures much higher biological activity for energy metabolism. Advanced cofactors like NADH and PQQ further support cellular resilience and cognitive energy.
Other sellers (1)
94 Performance

B-100 Complex with B2 Coenzyme

Nature's Way
4.7
★★★★★
(1088 ratings)
Incorporating bioactive coenzyme forms of riboflavin and B6 ensures that these vital cofactors are ready for immediate use by the body. This high-potency formula supports efficient energy conversion and overall vitality more effectively.
Other sellers (4)
95 Performance

Stress B-Complex

Thorne
4.8
★★★★★
(207 ratings)
Professional-grade nutrients like methylcobalamin and high-dose pantothenic acid offer superior metabolic support compared to standard tablets. The clean formulation and high transparency scores ensure a higher quality experience for systemic health.
Other sellers (3)
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