BioStacks
Best for
Ingredients (8)
Niacin (as Niacinamide)
100%Dose
50 mg
Target
25–500 mg
Form
Standard
Riboflavin (Vitamin B2)
10%Dose
2.5 mg
Target
25–100 mg
Form
Budget
Iron
100%Dose
18 mg
Target
15–45 mg
Form
Not listed
Thiamine (as Thiamine HCl)
10%Dose
2.5 mg
Target
25–100 mg
Form
Budget
Pantothenic Acid (as d-Panthenol)
4%Dose
2 mg
Target
50–500 mg
Form
Premium
Other Ingredients (8)
Caramel ColorColor
Class III and IV caramel colors contain 4-methylimidazole (4-MEI), classified by IARC as Group 2B (possibly carcinogenic to humans) in 2011 (Monograph Vol. 101). California Prop 65 lists 4-MEI as a known carcinogen; products delivering >29 mcg/day require a cancer warning label. NTP TR-535 (2007) found 4-MEI caused lung tumors in mice. Major cola brands (Coca-Cola, Pepsi) voluntarily reformulated 2012-2014 to reduce 4-MEI below California thresholds. Because labels never specify Class I (sugar + heat only, safer) vs Class III/IV (ammonia-process, contains 4-MEI), consumers cannot verify which they're consuming. Combined with the additive's purely cosmetic purpose, the risk:benefit ratio is unfavorable for any supplement.
Nutritional YeastBase
Can trigger reactions in people with yeast sensitivity or Candida overgrowth. High in tyramine — may interact with MAOIs and cause hypertensive crisis. High in purines — may worsen gout. Can cause bloating and GI discomfort.
Invert SugarSweetener
Effectively a high-glycemic sugar (glucose + fructose) that spikes blood sugar. Provides empty calories with no health benefit; we flag added sugars in supplements.
Grain Alcohol (ethanol)Solvent
Food-grade ethanol used as an extraction or carrier solvent.
Benzoic AcidPreservative
An organic acid used as an antimicrobial preservative in liquids and topicals
Natural FlavorsFlavor
Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.
Citric AcidAcidulant
Natural acid derived from citrus fruits
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
How to Take It
Best taken in the morning
Many people prefer B-vitamins earlier in the day; take with food to avoid nausea.
With food
Iron does better on an empty stomach, but something else in this bottle needs food. Taking the whole product with a meal is the better trade — an upset stomach is why most people stop.
Keep it away from coffee, tea and dairy
Space it a couple of hours from Calcium, Zinc, Magnesium, Manganese and Green Tea Leaf Extract
On the label
Adults and children 12 years and older: 1/2 fl. oz. (1 Tablespoon/15ml) daily after a meal.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$11.93
Cheaper than 74% of 97 vitamin B1 supplements
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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.