BioStacks
Solgar

Non-GMO Super Concentrated Isoflavones Tablets

1 Tablet · 120 servings · $0.29/serving

iHerbAmazon

Ingredients (1)

Soy Isoflavones

95%

Dose

38 mg

Target

40–90 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.

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.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Magnesium StearateLubricant

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

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

How to Take It

Take it anytime

Timing doesn't matter for this one — taking it consistently does.

With or without food

On the label

As a dietary supplement for adults, take one (1) tablet up to two times daily, preferably with a meal or as directed by a healthcare practitioner.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$34.49

$10$20$50

Pricier than 85% of 12 soy isoflavone 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.

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