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Kirkland Signature KirSublingual B-12 5000 MCG, 300 Tablets
Photo: Open Food Facts contributors (CC BY-SA)

Dietary supplements

Kirkland Signature KirSublingual B-12 5000 MCG, 300 Tablets

300 Tablets

Excellent out of 100 Medium confidence
  • Contains non-nutritive sweeteners
  • Contains sugar alcohols
  • Third-party tested supplement
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Why it scores 100

Kirkland Signature KirSublingual B-12 5000 MCG, 300 Tablets scores 100 out of 100 (Excellent) under GoodSwap’s published rules. What moved the score most:

  1. Third-party certified: Independently tested and certified by a third party. Info
  2. Sucralose: In a 2022 randomized study, sucralose and saccharin altered the gut microbiome and impaired glucose responses in some people; a 2023 lab study raised questions about its by-product sucralose-6-acetate. Strong
  3. Mannitol: Large amounts can have a laxative effect; the EU requires a label statement above 10% added polyols and the US for some polyols above set intakes. Regulatory

Every line of the math is on The Receipt below, with its evidence tier and sources.

The Receipt

KirSublingual B-12 5000 MCG, 300 Tablets

START100

Ingredients

  • Sucralose
    Strong In a 2022 randomized study, sucralose and saccharin altered the gut microbiome and impaired glucose responses in some people; a 2023 lab study raised questions about its by-product sucralose-6-acetate. [1][2][3][4][5]
  • Mannitol
    Regulatory Large amounts can have a laxative effect; the EU requires a label statement above 10% added polyols and the US for some polyols above set intakes. [6][7]
  • Powdered cellulose
    Info An additive class typical of ultra-processed foods (NOVA group 4). [8]
  • Natural flavors
    Info "Natural flavor" is a legal category (21 CFR 101.22(a)(3)): flavor substances from spices, fruits, vegetables, meat, dairy or fermentation. [9][8]
  • Silicon dioxide
    Info An additive class typical of ultra-processed foods (NOVA group 4). [8]
subtotal−8

Bonuses

  • Third-party certified
    Info Independently tested and certified by a third party. [10]
subtotal+8
TOTAL 100Excellent

100 + 0 = 100

GTIN 00096619879526 · 2026-05-13

score v1.3.0 · kb 2026.10.11

Medium confidence

Same product, same score. Every time.

Nutrition per 100 g

Saturated fat0 g
Sugars0 g
Added sugars0 g

Serving: 1Tablet

Ingredients

High Moderate Not recognized Tap an ingredient for its evidence and rules.
Label text, as published

Mannitol, Microcrystaline Cellulose, Crospovidone, Stearic Acid, Contains 2% or less of Magnesium Stearate, Methylcobalamin, Natural Cherry Flavor, Red Beet Root (color), Silica, Sucralose

Allergens and diets

  • Palm-oil-free

Always check the package: recipes change.

More from Kirkland Signature

Sources

  1. Personalized microbiome-driven effects of non-nutritive sweeteners on human glucose tolerance

    Cell · September 2022 · Peer-reviewed

    “As groups, each administered NNS distinctly altered stool and oral microbiome and plasma metabolome, whereas saccharin and sucralose significantly impaired glycemic responses.”

    doi.org

  2. Toxicological and pharmacokinetic properties of sucralose-6-acetate and its parent sucralose: in vitro screening assays

    Journal of Toxicology and Environmental Health, Part B · Aug 18, 2023 · Peer-reviewed

    “Sucralose-6-acetate significantly increased the expression of genes associated with inflammation, oxidative stress, and cancer”

    doi.org

  3. EFSA finds sucralose safe when used as currently authorised; cannot confirm safety of extending its use

    European Food Safety Authority · Feb 17, 2026 · Agency assessment

    “EFSA’s experts concluded that the sweetener sucralose (E 955) continues to be safe for consumers for its currently authorised uses as a food additive.”

    efsa.europa.eu

  4. WHO advises not to use non-sugar sweeteners for weight control in newly released guideline

    World Health Organization · May 15, 2023 · Agency assessment

    “The recommendation is based on the findings of a systematic review of the available evidence which suggests that use of NSS does not confer any long-term benefit in reducing body fat in adults or children.”

    who.int

  5. Dietary Guidelines for Americans, 2025–2030

    U.S. Department of Health and Human Services and U.S. Department of Agriculture · January 2026 · Regulator

    “Limit foods and beverages that include artificial flavors, petroleum-based dyes, artificial preservatives, and low-calorie non-nutritive sweeteners.”

    cdn.realfood.gov

  6. Regulation (EU) No 1169/2011, Annex III point 2.4 (foods with more than 10 % added polyols)

    European Union (Official Journal) · Oct 25, 2011 · Law

    “‘excessive consumption may produce laxative effects’.”

    eur-lex.europa.eu

  7. 21 CFR 184.1835 Sorbitol

    Electronic Code of Federal Regulations (eCFR), U.S. Office of the Federal Register · Nov 22, 2016 · Law

    ““Excess consumption may have a laxative effect.””

    ecfr.gov

  8. Ultra-processed foods: what they are and how to identify them

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  9. 21 CFR 101.22 Foods; labeling of spices, flavorings, colorings and chemical preservatives

    Electronic Code of Federal Regulations (eCFR), U.S. Office of the Federal Register · Dec 19, 2016 · Law

    “whose significant function in food is flavoring rather than nutritional.”

    ecfr.gov

  10. NSF Certified for Sport

    NSF International · Jan 1, 2026 · Independent test

    “The Certified for Sport® certification is the only independent third-party certification program recognized by the United States Anti-Doping Agency (USADA), Major League Baseball, the National Hockey League, and the Canadian Football League.”

    nsfsport.com