BioStacks
GNC

Vitamin B-2 100 mg

1 Tablet · 100 servings · $0.15/serving

iHerbAmazon
52 / 100Average

Best for

Energy

Score Breakdown

Formulation
60
Safety
87
Final score
52/100

Ingredients (2)

Riboflavin

100%

Dose

100 mg

Target

25–100 mg

Form

Budget

Calcium

46 mg

Trace amount — not scored

Other Ingredients (9)

Rice FlourFiller

Rice-based ingredients carry risk of inorganic arsenic contamination (FDA and Consumer Reports). Rice accumulates arsenic from soil at higher rates than other grains. Used as a cheap filler — adds nothing beneficial.

Glyceryl StearateEmulsifier

A glycerin-and-stearic-acid ester used as an emulsifier and skin-conditioning agent

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Polyethylene Glycol (Coating)Coating

A polyether polymer used as a tablet coating and plasticizer

Carnauba WaxCoating

Hard plant wax from the carnauba palm used to glaze gummies and tablets

Croscarmellose SodiumDisintegrant

Cross-linked cellulose derivative used as a superdisintegrant

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

HypromelloseCapsule

Plant-derived capsule material from cellulose

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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