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Quest Protein Milkshake
Photo: Open Food Facts contributors (CC BY-SA)

Protein shakes

Quest Protein Milkshake

14 oz

Excellent out of 100 High confidence
  • Contains non-nutritive sweeteners
  • Contains seed oils
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Why it scores 89

Quest Protein Milkshake scores 89 out of 100 (Excellent) under GoodSwap’s published rules. What moved the score most:

  1. 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
  2. Vegetable oil (unspecified): High in omega-6 linoleic acid. Emerging
  3. Sunflower oil: High in omega-6 linoleic acid. Emerging

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

The Receipt

Protein Milkshake

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]
  • Vegetable oil (unspecified)
    Emerging High in omega-6 linoleic acid. [6][7][8][9]
  • Sunflower oil
    Emerging High in omega-6 linoleic acid. [6][7][8][9]
  • Canola oil
    Emerging High in omega-6 linoleic acid. [6][7][8][9]
  • Soybean oil
    Emerging High in omega-6 linoleic acid. [6][7][8][9]
  • 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. [10][11]
  • Sodium hexametaphosphate
    Strong EFSA (2019) set a group ADI for phosphates of 40 mg/kg body weight (as phosphorus) and noted that infants, toddlers and children may exceed it. [12]
  • Lecithin
    Info An additive class typical of ultra-processed foods (NOVA group 4). [11]
  • Soy lecithin
    Info An additive class typical of ultra-processed foods (NOVA group 4). [11]
  • Gellan gum
    Info An ingredient class typical of ultra-processed foods (NOVA group 4). [11]
  • Sodium phosphate
    Strong EFSA (2019) set a group ADI for phosphates of 40 mg/kg body weight (as phosphorus) and noted that infants, toddlers and children may exceed it. [12]
subtotal−11
TOTAL 89Excellent

100 − 11 = 89

GTIN 00888849016020 · 2026-06-01

score v1.3.0 · kb 2026.10.11

High confidence

Same product, same score. Every time.

Nutrition per 100 g

Energy56 kcal
Fat1 g
Saturated fat0.2 g
Trans fat0 g
Carbohydrates0.7 g
Sugars0.5 g
Added sugars0 g
Fiber0 g
Protein10.9 g
Salt0.2 g

Serving: 1 bottle (414 ml)

Ingredients

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

Ultrafiltered nonfat milk, vegetable oil (sunflower, canola, and/or soybean oil), natural flavors, sucralose, salt, sodium polyphosphate, lecithin (sunflower, canola, and/or soy lecithin), gellan gum, trisodium phosphate.

Allergens and diets

Contains: Milk, Soy

  • Not vegan
  • Palm-oil-free

Always check the package: recipes change.

Healthiest protein shakes in the US

More from Quest

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. Re-evaluation of the traditional diet-heart hypothesis: analysis of recovered data from Minnesota Coronary Experiment (1968-73)

    BMJ · Apr 12, 2016 · Peer-reviewed

    “replacement of saturated fat in the diet with linoleic acid effectively lowers serum cholesterol but does not support the hypothesis that this translates to a lower risk of death from coronary heart disease or all causes.”

    doi.org

  7. Use of dietary linoleic acid for secondary prevention of coronary heart disease and death: evaluation of recovered data from the Sydney Diet Heart Study and updated meta-analysis

    BMJ · Feb 4, 2013 · Peer-reviewed

    doi.org

  8. Dietary Linoleic Acid and Risk of Coronary Heart Disease: A Systematic Review and Meta-Analysis of Prospective Cohort Studies

    Circulation · Oct 28, 2014 · Peer-reviewed

    “These data provide support for current recommendations to replace saturated fat with polyunsaturated fat for primary prevention of CHD.”

    doi.org

  9. Dietary Fats and Cardiovascular Disease: A Presidential Advisory From the American Heart Association

    Circulation · Jul 18, 2017 · Peer-reviewed

    doi.org

  10. 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

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

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  12. EFSA issues new advice on phosphates

    European Food Safety Authority · Jun 12, 2019 · Agency assessment

    “We estimated that dietary exposure to phosphates may exceed the new ADI for infants, toddlers and children with average consumption of phosphates in their diet.”

    efsa.europa.eu