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Ruze Protein Peanutbutter Flavor
Photo: Open Food Facts contributors (CC BY-SA)

Protein powders

Ruze Protein Peanutbutter Flavor

39.9 g

Excellent out of 100 High confidence
  • Contains non-nutritive sweeteners
  • Contains emulsifiers studied for gut effects
  • Contains artificial flavors
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Why it scores 80

Ruze Protein Peanutbutter Flavor scores 80 out of 100 (Excellent) under GoodSwap’s published rules. What moved the score most:

  1. Cellulose gum (carboxymethylcellulose): In a small randomized feeding trial, carboxymethylcellulose modestly increased abdominal discomfort and reduced gut microbiota diversity; in mice it promoted low-grade inflammation. Strong
  2. Carrageenan: In the NutriNet-Santé cohort, higher carrageenan intake was associated with a higher risk of type 2 diabetes; cause and effect is not established. Strong
  3. 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

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

The Receipt

Protein Peanutbutter Flavor

START100

Ingredients

  • Cellulose gum (carboxymethylcellulose)
    Strong In a small randomized feeding trial, carboxymethylcellulose modestly increased abdominal discomfort and reduced gut microbiota diversity; in mice it promoted low-grade inflammation. [1][2][3][4]
  • Carrageenan
    Strong In the NutriNet-Santé cohort, higher carrageenan intake was associated with a higher risk of type 2 diabetes; cause and effect is not established. [5][2][6][7]
  • 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. [8][9][10][11][12]
  • Acesulfame potassium (Ace-K)
    Strong In the NutriNet-Santé cohort, acesulfame-K intake was associated with higher cancer risk; cause and effect is not established. [13][14][11][12]
  • Whey protein concentrate / isolate
    Info An ingredient typical of ultra-processed foods (NOVA group 4). [15]
  • Inulin (chicory root fiber)
    Info An ingredient class typical of ultra-processed foods (NOVA group 4). [15]
  • 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. [16][15]
  • Artificial flavors
    Strong US dietary guidelines advise limiting foods with artificial flavors. [12][17]
  • Vegetable gums (unspecified)
    Info An ingredient class typical of ultra-processed foods (NOVA group 4). [15]
  • Xanthan gum
    Info An ingredient class typical of ultra-processed foods (NOVA group 4). [15]
subtotal−20.5
TOTAL 80Excellent

100 − 20.5 = 79.5 → 80

GTIN 00850041914299 · 2026-08-18

score v1.3.0 · kb 2026.10.11

High confidence

Same product, same score. Every time.

Nutrition per 100 g

Energy376 kcal
Fat7.5 g
Saturated fat5 g
Carbohydrates12.5 g
Sugars5 g
Added sugars0 g
Fiber2.5 g
Protein62.7 g
Salt1.8 g

Serving: 1 scoop (39.9 g)

Ingredients

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

Instantized Whey Protein Isolate, Instantized Whey Protein Concentrate, Powdered Peanut Butter, Medium Chain Triglyceride Powder (from coconut oil), Organic Agave Inulin, Natural Flavor, Artificial Flavor, Salt, Gum Blend (cellulose gum, xanthan gum, carrageenan), Sucralose, Potassium Chloride, Acesulfame Potassium. ALLERGENS: Milk, Soy, Peanuts, Tree Nuts (coconut).

Allergens and diets

Contains: Milk, Peanuts, Tree nuts, Soy

  • Not vegan
  • Palm-oil-free

Always check the package: recipes change.

Healthiest protein powders in the US

Sources

  1. Randomized Controlled-Feeding Study of Dietary Emulsifier Carboxymethylcellulose Reveals Detrimental Impacts on the Gut Microbiota and Metabolome

    Gastroenterology · March 2022 · Peer-reviewed

    “Relative to control subjects, CMC consumption modestly increased postprandial abdominal discomfort and perturbed gut microbiota composition in a way that reduced its diversity.”

    doi.org

  2. Dietary emulsifiers impact the mouse gut microbiota promoting colitis and metabolic syndrome

    Nature · Mar 5, 2015 · Peer-reviewed

    “carboxymethylcellulose and polysorbate-80, induced low-grade inflammation and obesity/metabolic syndrome in wild-type hosts and promoted robust colitis in mice predisposed to this disorder.”

    doi.org

  3. Food additive emulsifiers and risk of cardiovascular disease in the NutriNet-Santé cohort: prospective cohort study

    BMJ · Sep 6, 2023 · Peer-reviewed

    “This study found positive associations between risk of CVD and intake of five individual and two groups of food additive emulsifiers widely used in industrial foods.”

    doi.org

  4. Re-evaluation of celluloses E 460(i), E 460(ii), E 461, E 462, E 463, E 464, E 465, E 466, E 468 and E 469 as food additives

    European Food Safety Authority · Jan 16, 2018 · Agency assessment

    “The Panel concluded that there was no need for a numerical ADI and that there would be no safety concern at the reported uses and use levels for the unmodified and modified celluloses”

    doi.org

  5. Food additive emulsifiers and the risk of type 2 diabetes: analysis of data from the NutriNet-Santé prospective cohort study

    The Lancet Diabetes & Endocrinology · May 2024 · Peer-reviewed

    “We found direct associations between the risk of type 2 diabetes and exposures to various food additive emulsifiers widely used in industrial foods, in a large prospective cohort of French adults.”

    doi.org

  6. Re-evaluation of carrageenan (E 407) and processed Eucheuma seaweed (E 407a) as food additives

    European Food Safety Authority · Apr 26, 2018 · Agency assessment

    “However, the Panel noted uncertainties as regards the chemistry, the exposure assessment and biological and toxicological data.”

    doi.org

  7. Agents Classified by the IARC Monographs, Volumes 1–142 (List of Classifications)

    International Agency for Research on Cancer (WHO) · IARC

    monographs.iarc.who.int

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. Artificial sweeteners and cancer risk: Results from the NutriNet-Santé population-based cohort study

    PLOS Medicine · Mar 24, 2022 · Peer-reviewed

    “In this large cohort study, artificial sweeteners (especially aspartame and acesulfame-K), which are used in many food and beverage brands worldwide, were associated with increased cancer risk.”

    doi.org

  14. Re-evaluation of acesulfame K (E 950) as food additive (plain language summary)

    European Food Safety Authority · Apr 30, 2025 · Agency assessment

    “The acceptable daily intake (ADI) considered safe for all population groups was set at 15 mg/kg body weight (bw) per day.”

    efsa.europa.eu

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

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  16. 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

  17. 21 CFR 172.515 Synthetic flavoring substances and adjuvants

    Electronic Code of Federal Regulations (eCFR), U.S. Office of the Federal Register · Oct 9, 2017 · Law

    ecfr.gov