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Pure Encapsulations

OptiFerin-C

1 Capsule · 60 servings

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What it does

A combination of 3 label ingredients.

Vitamin C

Mixed formsGrade —

Supports normal collagen production and immune function, and helps the body absorb iron from plant foods.

Calcium

Mixed formsGrade —

Supports the maintenance of normal bones and teeth, muscle function and nerve signaling.

Energy
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Ingredients (3)

Calcium

11 mg

Trace amount — not scored

Other ingredients

Ascorbyl PalmitateAntioxidant

Fat-soluble form of vitamin C used as preservative

Microcrystalline CelluloseBinder

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

Hypoallergenic Plant FiberFiller

Plant-derived cellulose fiber used as a hypoallergenic filler, common in Thorne and Pure Encapsulations products

Purified WaterSolvent

Water meeting USP specifications used as solvent/vehicle in gummies and liquids

Lab testing

How to take it

On an empty stomach
Keep it away from coffee, tea and dairy
Space it a couple of hours from Calcium, Zinc, Magnesium, Manganese and Green Tea Leaf Extract

On the label

Recommendations: As a dietary supplement, take 1 capsule, 1-3 times daily, with meals.

Labels usually say “with food” because it's gentler on the stomach, not because it absorbs better. Fasted absorbs more — start there, and switch to a light meal if it bothers you.

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What 375 vitamin C supplements cost

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.

Not medical advice. Consult your healthcare professional.

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