BioStacks
Best for
Ingredients (3)
Iron
53%Dose
8 mg
Target
15–45 mg
Form
Premium
Vitamin B12
80%Dose
200 mcg
Target
250–5000 mcg
Form
Budget
Liquid Liver Fractions
7%Dose
200 mg
Target
3000–6000 mg
Form
—
Other Ingredients (7)
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.
Soy LecithinEmulsifier
Widely used emulsifier derived from soybeans
BeeswaxCoating
Natural wax produced by honeybees, used as a coating and binding agent in softgels and tablets
GelatinCapsule
Protein derived from collagen, used in traditional capsule shells
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
Vegetable OilCarrier
Edible oils used as carriers in softgels and as processing aids
How to Take It
Best taken in the morning
Bisglycinate is the gentle form — most people tolerate it on an empty stomach, which is exactly where it absorbs best. Vitamin C may help absorption.
On an empty stomach
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
Take 2 softgels once or twice daily, or as recommended by a healthcare professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$20.90
Pricier than 70% of 138 iron 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.