If you're addressing an iron deficiency, this product delivers 65 mg of **Iron** per tablet — right at the top of the 15–45 mg clinical range and well above the tolerable upper limit of 45 mg for general supplementation. At this dose, you're getting a therapeutic amount typically used for deficiency correction, not daily maintenance.
The form you're getting is ferrous sulfate, which is one of the most studied iron forms and reasonably well-absorbed, but it's also the form most associated with GI side effects like constipation and nausea. More bioavailable forms like iron bisglycinate can achieve similar absorption at much lower doses with fewer stomach issues.
This is an aggressive dose that makes sense if your doctor has confirmed low iron levels. For routine supplementation or mild deficiency prevention, 65 mg of ferrous sulfate may be more than you need and harder on your stomach than necessary.
BioStacks
Best for
Ingredients (1)
Iron
100%Dose
65 mg
Target
15–45 mg
Form
Budget
Other Ingredients (13)
Artificial ColorsColorant
May trigger hyperactivity in sensitive children; potential link to allergic reactions
Artificial ColorsColorant
May trigger hyperactivity in sensitive children; potential link to allergic reactions
TalcAnti-caking
IARC classifies cosmetic-grade talc not containing asbestos as Group 2B (possibly carcinogenic to humans); perineal talc use as Group 2A (probably carcinogenic). Johnson & Johnson voluntarily withdrew talc-based baby powder from US/Canada in 2020 and globally in 2022 after extensive litigation tied to ovarian-cancer and mesothelioma cases. The 2018 FDA contamination survey found asbestos in 9 of 52 cosmetic talc products tested. As a supplement excipient talc is a pure manufacturing convenience — no nutritional or functional benefit to the user — so the asbestos-exposure risk has no offsetting upside. Safer alternatives (silicon dioxide, microcrystalline cellulose, rice hulls) are widely available.
Titanium DioxideColorant
Banned in the EU (2022) over concerns that its ultra-fine particles may damage DNA in gut cells. Still allowed in the US. Used only for white coloring — provides no health benefit.
SorbitolSweetener
A FODMAP sugar alcohol that may trigger GI discomfort (bloating, gas) in individuals with IBS or sorbitol malabsorption, even at small amounts found in supplements. Avoided in low-FODMAP diets.
DextroseSweetener
A simple glucose sugar used as a bulking agent, sweetener, and tablet diluent
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
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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.