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Optifiber

product on market Powder Kirkland Signature Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade
Label

Product Label

Label for Optifiber
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Teaspoon(s)
Serving Size
190
Servings
Fiber and Other Nutrients
Product Type
0%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Calories
15 Calorie(s)
Sodium
Total Carbohydrates
4 Gram(s) (1% DV)

Other Ingredients

Wheat Dextrin
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Use: 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.

Warnings & Precautions

Children under 6 years of age: Consult your doctor before use.

Contains wheat ingredients Gluten free: Less than 20 ppm gluten

Warning: If you are pregnant, nursing, taking any medications or planning any medical procedure, consult your doctor before use.

Discontinue use and consult your doctor if any adverse reactions occur.

Keep out of the reach of children.

Important: Tamper-evident seal under cap. Do not use if printed seal is broken or missing.

Formulation Notes

A natural prebiotic fiber supplement

Flavor-free Sugar-free Gluten-free

Supports good bacteria Dissolves completely in water Non-thickening

Natural fiber supplement Completely dissolves in water Non-thickening and grit-free

No preservatives added No lactose No artificial color No artificial flavor Non-GMO Gluten-free

Since 1995, the Kirkland Signature brand has been providing high quality supplements at a great member value. Kirkland Signature vitamins, minerals, and supplements are made from carefully selected ingredients from trusted suppliers. The supplements are manufactured in accordance with Good Manufacturing Practice standards. Additionally, many of the items are verified by the United States Pharmacopeia (USP) which is an independent, scientific, non-profit organization that sets strict quality and purity standards for dietary supplements.

Additional Information

Compare to Benefiber

Store at room temperature, tightly closed. Avoid excessive heat.

Metadata

Product Details

DSLD Entry Date2022-08-23
Product TypeFiber and Other Nutrients
FormPowder
DSLD ID276001
Data Updated2026-04-11
Research

Research Evidence

120
Research Sources
51
Avg Quality
47
Clinical Trial
38
Rct
20
Meta Analysis
13
Systematic Review
2
Cochrane Review
A The Gut Microbiome in Depression and Potential Benefit of Prebiotics, Probiotics and Synbiotics: A Systematic Review of Clinical Trials and Observational Studies
Systematic Review International journal of molecular sciences 2022 PubMed DOI
A Prebiotics for induction and maintenance of remission in ulcerative colitis
Systematic Review The Cochrane database of systematic reviews 2024 PubMed DOI
A Effect of chicory-derived inulin-type fructans on abundance of Bifidobacterium and on bowel function: a systematic review with meta-analyses
Meta Analysis Critical reviews in food science and nutrition 2023 PubMed DOI
A Probiotics for management of functional abdominal pain disorders in children
Meta Analysis The Cochrane database of systematic reviews 2023 PubMed DOI
A Dietary fiber intervention on gut microbiota composition in healthy adults: a systematic review and meta-analysis
Meta Analysis The American journal of clinical nutrition 2018 PubMed DOI
B Effect of psyllium (Plantago ovata) fiber on LDL cholesterol and alternative lipid targets, non-HDL cholesterol and apolipoprotein B: a systematic review and meta-analysis of randomized controlled trials
Meta Analysis The American journal of clinical nutrition 2018 PubMed DOI
B Prebiotic and probiotic supplementation and the tryptophan-kynurenine pathway: A systematic review and meta analysis
Meta Analysis Neuroscience and biobehavioral reviews 2021 PubMed DOI
B Prebiotics, probiotics, fermented foods and cognitive outcomes: A meta-analysis of randomized controlled trials
Meta Analysis Neuroscience and biobehavioral reviews 2020 PubMed DOI
B Synbiotics, prebiotics and probiotics for people with chronic kidney disease
Systematic Review The Cochrane database of systematic reviews 2023 PubMed DOI
B Effects of Prebiotics and Probiotics on Symptoms of Depression and Anxiety in Clinically Diagnosed Samples: Systematic Review and Meta-analysis of Randomized Controlled Trials
Meta Analysis Nutrition reviews 2025 PubMed DOI
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.