BioStacks
21st Century

Sentry Adults

1 Tablet · 130 servings · $0.08/serving

18 / 100Very Poor

Score Breakdown

Formulation
52
Safety
30
Final score
18/100

Ingredients (27)

Iodine

100%

Dose

150 mcg

Target

150–500 mcg

Form

Premium

Vitamin D3

100%

Dose

1000 IU

Target

1000–5000 IU

Form

Premium

Vitamin B6

100%

Dose

2 mg

Target

1.3–25 mg

Form

Premium

Pantothenic Acid

20%

Dose

10 mg

Target

50–500 mg

Form

Premium

Iron

100%

Dose

18 mg

Target

15–45 mg

Form

Standard

Other Ingredients (15)

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.

FD&C Yellow No. 6Colorant

May trigger sensitivity in some individuals; behavioral concerns in susceptible children

MonoglyceridesEmulsifier

Glycerol monoesters of fatty acids used as emulsifiers and processing lubricants

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

MonoglyceridesEmulsifier

Glycerol monoesters of fatty acids used as emulsifiers and processing lubricants

Polyethylene Glycol (Coating)Coating

A polyether polymer used as a tablet coating and plasticizer

Polyvinyl AlcoholCoating

Synthetic, water-soluble polymer used as a film former and binder in immediate-release tablet coatings

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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.