BioStacks
Other Ingredients (4)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Croscarmellose SodiumDisintegrant
Cross-linked cellulose derivative used as a superdisintegrant
How to Take It
Best taken in the morning
Carbonyl iron dissolves slowly, which makes it gentler and safer in overdose — but it also absorbs more slowly. Take it with food.
With food
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 1 tablet daily.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$9.99
Cheaper than 90% of 502 vitamin C 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.