BioStacks
Other Ingredients (11)
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.
IsomaltSweetener
A poorly-absorbed sugar alcohol that can cause bloating, gas, and laxative effects at higher doses (EFSA notes laxative threshold for polyols). Tolerable for most, but cumulative across products.
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Medium Chain Triglyceride OilCarrier
Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent
MonoglyceridesEmulsifier
Glycerol monoesters of fatty acids used as emulsifiers and processing lubricants
Polyvinyl AlcoholCoating
Synthetic, water-soluble polymer used as a film former and binder in immediate-release tablet coatings
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Calcium CarbonateBuffer
Common calcium salt used as a buffering agent, filler, or mineral fortification in supplements
How to Take It
Take it anytime
Take it with food — the zinc in it is what makes this kind of product feel nauseating on an empty stomach.
With food
Lysine 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.
Space it a couple of hours from Iron and Calcium
On the label
Adults: Take 1-3 caplets daily with a meal. Take a few hours before or after taking other medications. Store between 15°C and 25°C, away from children.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$19.99
Near the median of 375 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.