BioStacks
Life Extension

Buffered Vitamin C Powder

Powder · 5.4 Grams · 84 servings · $0.25/serving

40 / 100Average

Best for

Score Breakdown

Formulation
47
Safety
85
Final score
40/100

Ingredients (5)

Potassium

100%

Dose

365 mg

Target

99–500 mg

Form

Budget

Vitamin C

100%

Dose

4000 mg

Target

250–2000 mg

Form

Budget

Magnesium

55%

Dose

55 mg

Target

100–400 mg

Form

Budget

Zinc

13%

Dose

2 mg

Target

15–30 mg

Form

Standard

Calcium

145 mg

Trace amount — not scored

Other Ingredients

No other ingredients listed

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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.