BioStacks
Source Naturals

FOS 1000mg

4 Tablets · 50 servings

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What it does

A combination of 3 label ingredients.

Prebiotic Fiber

Form not confirmedGrade —

May improve stool frequency and consistency in people with constipation; pain and bloating benefits remain unestablished.

Fiber

Form not confirmedGrade —

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

Digestion
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Ingredients (2)

IngredientDoseTarget/referenceForm

Nutrition

Calories, macros & sodium.

  • Sodium5 mg

Other ingredients

Magnesium StearateLubricant

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

Hydroxypropyl CelluloseBinder

An inert modified-cellulose polymer used as a binder, film-former, and disintegrant.

Microcrystalline CelluloseBinder

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

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

Lab testing

How to take it

With food
Keep it away from medication and mineral supplements

On the label

Take 4 tablets daily.

Price check

$40.49

$0.81 / serving

$10$20

Pricier than 97% of 28 prebiotic fiber supplements

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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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