BioStacks
Kirkland Signature

Optifiber

Powder · 2 Teaspoons × 3/day · 190 servings

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What it does

Fiber

Form not confirmedGrade —

Some fiber supplements improve bowel regularity in adults with constipation; effects vary by fiber type and amount.

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Ingredients (2)

IngredientDoseTarget/referenceForm

Other ingredients

Tapioca DextrinCarrier

A starch hydrolysate from tapioca used as a carrier and flow agent

Lab testing

How to take it

With food
Keep it away from medication and mineral supplements
Split into 3 doses across the day

On the label

Stir two (2) teaspoons (1 scoop) of Optifiber into at least 4 oz of any non-carbonated beverage or soft food. Stir until dissolved.Adults and children 12 and over 3 to 5 servings per day.Children 6-11 years of age 3 servings per day.Children under 6 years of age Consult your doctor before use.

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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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