BioStacks
Source Naturals

Spirulina 500 mg

6 Tablets · 16 servings · $0.75/serving

iHerbAmazon
67 / 100Good

Best for

Immune

Score Breakdown

Formulation
67
Safety
100
Final score
67/100

Ingredients (3)

Spirulina

100%

Dose

3000 mg

Target

1000–3000 mg

Form

—

Vitamin A

100%

Dose

1020 mcg RAE

Target

700–1500 mcg

Form

Budget

Iron

850 mcg

Trace amount — not scored

Other Ingredients (3)

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Microcrystalline CelluloseBinder

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

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

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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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