Kirkland Signature Organic Multivitamin supplement bottle
Kirkland Signature

Organic Multivitamin Review

What We Researched
61 active ingredients analyzed · 8 inactive ingredients decoded · 4 brand certifications checked · Last updated: Aug 2026
74
Product Score Fair
80
Brand Score Good

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Botanical Blend 15 mg
Cordyceps Whole Mushroom Extract 0
Organic Cranberry 0
Holy Basil Leaf Extract 0
Reishi Whole Mushroom Extract 0
Shiitake Whole Mushroom Extract 0
Shiitake Whole Mushroom Extract 0
Organic Tart Cherry 0
Chromium 35 mcg
Iron 1.4 mg
Magnesium 1.1 mg
Selenium 55 mcg
Zinc 1.7 mg
Organic Broccoli Sprout 0
Organic Spirulina 0
Manganese 0.5 mg
Folate 400 mcg dfe
Pantothenic Acid 13.5 mg
Vitamin A 945 mcg RAE
Thiamin 5.6 mg
Vitamin B12 7.2 mcg
Riboflavin 5.6 mg
Vitamin B6 11.3 mg
Organic Annatto Extract 0
Organic Lemon Extract 0
Organic Sesbania Extract 0
Organic Wheatgrass 0
Organic Moringa Extract 0
Calcium 4.5 mg
Coriolus versicolor Whole Mushroom Extract 0
Folic Acid 240 mcg
Maitake Whole Mushroom Extract 0
Organic Tomato 0
Organic Astragalus Extract 0
Organic Blueberry 0
Organic Chlorella 0
Organic Lemon Juice 0
Orgnaic Agaricus blazei Whole Mushroom Extract 0
Organic Full Spectrum Mushroom Complex 10 mg
Organic Greens Alkalizing Blend 25 mg
Organic Alfalfa Grass 0
Organic Amla Extract 0
Organic Barley Grass 0
Organic Carrot 0
Organic Guava Extract 0
Organic Kale 0
Organic Kale 0
Organic Pomegranate 0
Organic Oat Grass 0
Organic Curry Extract 0
Organic Raspberry Extract 0
Organic Spinach 0
Organic Strawberry 0
Biotin 30 mcg
Niacin 7.9 mg ne
Vitamin C 90 mg
Vitamin D3 30 mcg
Vitamin E 15 mg
Organic Food Blend 470 mg
Horseradish Tree Leaf Extract 0
Organic Black Mustard Seed Extract 0
Bioavailability Good

Absorption Rating

  • Botanical Blend Fair
  • Cordyceps Whole Mushroom Extract Fair
  • Organic Cranberry Good
  • Holy Basil Leaf Extract Fair
  • Reishi Whole Mushroom Extract Poor
  • Shiitake Whole Mushroom Extract Fair
  • Shiitake Whole Mushroom Extract Fair
  • Organic Tart Cherry Good
  • Chromium Fair
  • Iron Fair
  • Magnesium Good
  • Selenium Good
  • Zinc Fair
  • Organic Broccoli Sprout Good
  • Organic Spirulina Good
  • Manganese Good
  • Folate Fair
  • Pantothenic Acid Good
  • Vitamin A Good
  • Thiamin Good
  • Vitamin B12 Fair
  • Riboflavin Good
  • Vitamin B6 Fair
  • Organic Annatto Extract Good
  • Organic Lemon Extract Fair
  • Organic Wheatgrass Fair
  • Organic Moringa Extract Fair
  • Calcium Good
  • Coriolus versicolor Whole Mushroom Extract Good
  • Folic Acid Fair
  • Maitake Whole Mushroom Extract Good
  • Organic Tomato Fair
  • Organic Astragalus Extract Good
  • Organic Blueberry Fair
  • Organic Chlorella Fair
  • Organic Lemon Juice Fair
  • Orgnaic Agaricus blazei Whole Mushroom Extract Fair
  • Organic Alfalfa Grass Fair
  • Organic Amla Extract Good
  • Organic Barley Grass Fair
  • Organic Carrot Fair
  • Organic Kale Good
  • Organic Kale Good
  • Organic Pomegranate Fair
  • Organic Oat Grass Poor
  • Organic Raspberry Extract Fair
  • Organic Spinach Good
  • Organic Strawberry Fair
  • Biotin Good
  • Niacin Good
  • Vitamin C Fair
  • Vitamin D3 Good
  • Vitamin E Good
  • Organic Food Blend Fair
  • Horseradish Tree Leaf Extract Fair
  • Organic Black Mustard Seed Extract Fair
Other Ingredients Excellent

Fillers & Additives

  • Maltodextrin
  • Sunflower Oil
  • Sunflower Lecithin
  • Rice Extract
  • Gum Arabic
  • Guar Gum
  • Rice Hulls
  • Palm Oil
Efficacy Poor

Dosage Analysis

  • Cordyceps Whole Mushroom Extract 0 Under-dosed
  • Holy Basil Leaf Extract 0 Under-dosed
  • Reishi Whole Mushroom Extract 0 Under-dosed
  • Shiitake Whole Mushroom Extract 0 Under-dosed
  • Shiitake Whole Mushroom Extract 0 Under-dosed
  • Chromium 35 mcg Effective
  • Iron 1.4 mg Under-dosed
  • Magnesium 1.1 mg Under-dosed
  • Selenium 55 mcg Effective
  • Zinc 1.7 mg Under-dosed
  • Organic Spirulina 0 Under-dosed
  • Manganese 0.5 mg Under-dosed
  • Folate 400 mcg dfe Effective
  • Pantothenic Acid 13.5 mg Effective
  • Vitamin A 945 mcg RAE Effective
  • Thiamin 5.6 mg Effective
  • Vitamin B12 7.2 mcg Effective
  • Riboflavin 5.6 mg Effective
  • Vitamin B6 11.3 mg Effective
  • Organic Annatto Extract 0 Under-dosed
  • Organic Wheatgrass 0 Under-dosed
  • Organic Moringa Extract 0 Under-dosed
  • Calcium 4.5 mg Under-dosed
  • Coriolus versicolor Whole Mushroom Extract 0 Under-dosed
  • Folic Acid 240 mcg Under-dosed
  • Maitake Whole Mushroom Extract 0 Under-dosed
  • Organic Astragalus Extract 0 Under-dosed
  • Organic Blueberry 0 Under-dosed
  • Organic Chlorella 0 Under-dosed
  • Orgnaic Agaricus blazei Whole Mushroom Extract 0 Under-dosed
  • Organic Amla Extract 0 Under-dosed
  • Organic Kale 0 Under-dosed
  • Organic Kale 0 Under-dosed
  • Organic Pomegranate 0 Under-dosed
  • Organic Oat Grass 0 Under-dosed
  • Organic Raspberry Extract 0 Under-dosed
  • Organic Spinach 0 Under-dosed
  • Organic Strawberry 0 Under-dosed
  • Biotin 30 mcg Effective
  • Niacin 7.9 mg ne Under-dosed
  • Vitamin C 90 mg Effective
  • Vitamin D3 30 mcg Effective
  • Vitamin E 15 mg Effective
  • Horseradish Tree Leaf Extract 0 Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Botanical Blend 15 mg
Cordyceps Whole Mushroom Extract 0
Organic Cranberry 0
Holy Basil Leaf Extract 0
Reishi Whole Mushroom Extract 0
Shiitake Whole Mushroom Extract 0
Shiitake Whole Mushroom Extract 0
Organic Tart Cherry 0
Chromium 35 mcg
Iron 1.4 mg
Magnesium 1.1 mg
Selenium 55 mcg
Zinc 1.7 mg
Organic Broccoli Sprout 0
Organic Spirulina 0
Manganese 0.5 mg
Folate 400 mcg dfe
Pantothenic Acid 13.5 mg
Vitamin A 945 mcg RAE
Thiamin 5.6 mg
Vitamin B12 7.2 mcg
Riboflavin 5.6 mg
Vitamin B6 11.3 mg
Organic Annatto Extract 0
Organic Lemon Extract 0
Organic Sesbania Extract 0
Organic Wheatgrass 0
Organic Moringa Extract 0
Calcium 4.5 mg
Coriolus versicolor Whole Mushroom Extract 0
Folic Acid 240 mcg
Maitake Whole Mushroom Extract 0
Organic Tomato 0
Organic Astragalus Extract 0
Organic Blueberry 0
Organic Chlorella 0
Organic Lemon Juice 0
Orgnaic Agaricus blazei Whole Mushroom Extract 0
Organic Full Spectrum Mushroom Complex 10 mg
Organic Greens Alkalizing Blend 25 mg
Organic Alfalfa Grass 0
Organic Amla Extract 0
Organic Barley Grass 0
Organic Carrot 0
Organic Guava Extract 0
Organic Kale 0
Organic Kale 0
Organic Pomegranate 0
Organic Oat Grass 0
Organic Curry Extract 0
Organic Raspberry Extract 0
Organic Spinach 0
Organic Strawberry 0
Biotin 30 mcg
Niacin 7.9 mg ne
Vitamin C 90 mg
Vitamin D3 30 mcg
Vitamin E 15 mg
Organic Food Blend 470 mg
Horseradish Tree Leaf Extract 0
Organic Black Mustard Seed Extract 0

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Sunflower Oil Safe

Helps dissolve and absorb fat-soluble vitamins.

Sunflower Lecithin Safe

Helps mix oil and water-based ingredients. Allergen-free alternative to soy lecithin.

Rice Extract Safe

It is used as a filler or to provide specific rice-derived compounds.

Gum Arabic Safe

It is used as a thickener, binder, or emulsifier.

Guar Gum Safe

Thickens and provides fiber in supplement formulations.

Rice Hulls Generally_safe

It is used as a filler or flow agent.

Palm Oil Generally_safe

Used as a carrier for fat-soluble ingredients.

Brand Trust Report
Kirkland Signature

Founded 1995 · Issaquah, Washington, United States · 56 products · costco.com/kirkland-signature.html

Certifications

4 certifications
Usp Verified Verified Source
Informed Choice Verified
USDA Organic Verified
Gluten-Free Certified Verified

Transparency

5 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Claimed
Contains Proprietary Blend — True

Violation History

3 incidents
Lawsuit Falsely advertising rotisserie chicken as containing 'no preservatives'2026Source
Recall Kirkland Signature B100 Complex Timed Release2025-03-31Source
Recall Kirkland Signature Severe Cold and Flu Plus Congestion2024-11-30Source
Related Supplements
Frequently Asked Questions
Is Kirkland Signature Organic Multivitamin a good supplement?

Kirkland Signature Organic Multivitamin received a product quality score of 74/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 61 active ingredients with 80 servings per container. Of the 8 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Kirkland Signature, holds a brand trust score of 80/100 with 4 verified certifications including Usp Verified, Informed Choice, USDA Organic, Gluten-Free Certified.

What are the ingredients in Kirkland Signature Organic Multivitamin?

Kirkland Signature Organic Multivitamin contains 61 active ingredients: Botanical Blend (15 mg), Cordyceps Whole Mushroom Extract (0), Organic Cranberry (0), Holy Basil Leaf Extract (0), Reishi Whole Mushroom Extract (0), Shiitake Whole Mushroom Extract (0), and 55 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkland Signature Organic Multivitamin safe to take?

Kirkland Signature Organic Multivitamin has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Kirkland Signature a trustworthy supplement brand?

Kirkland Signature receives a brand trust score of 80/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1995 and headquartered in Issaquah, Washington, United States, the company offers 56 products in their lineup. They hold 4 verified certifications including Usp Verified, Informed Choice, USDA Organic, Gluten-Free Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Kirkland Signature has 3 historical regulatory incidents on record, which are factored into the trust score.

How much vitamin d3 should i take daily?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What does vitamin d do?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 150,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How much vitamin d3 per day for a woman?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.