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Mission Street Tacos White Corn Tortillas
Photo: Open Food Facts contributors (CC BY-SA)

Meals

Mission Street Tacos White Corn Tortillas

24 count / 12.6 oz / 357 g

Good out of 100 Medium confidence
  • Ultra-processed
  • Contains emulsifiers studied for gut effects
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Why it scores 64

Mission Street Tacos White Corn Tortillas scores 64 out of 100 (Good) under GoodSwap’s published rules. What moved the score most:

  1. Ultra-processed (NOVA 4): Classified NOVA 4: made with industrial ingredients and additives. Strong
  2. 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
  3. Benzoic acid: Benzoates can form small amounts of benzene in drinks that also contain ascorbic acid (vitamin C), especially with heat or light. Strong

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

Better tortillas and wraps

The same kind of product, at least 10 points higher, sold in the US. Never paid placements.

The Receipt

Street Tacos White Corn Tortillas

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]
  • Benzoic acid
    Strong Benzoates can form small amounts of benzene in drinks that also contain ascorbic acid (vitamin C), especially with heat or light. [5]
  • Guar gum
    Info An ingredient class typical of ultra-processed foods (NOVA group 4). [6]
  • Propionic acid
    Regulatory Health Canada permits it only in listed foods, up to set limits (2,000 ppm in bread). [7]
subtotal−19

Processing

  • Ultra-processed (NOVA 4)
    Strong Classified NOVA 4: made with industrial ingredients and additives. [6]
subtotal−18

Nutrition per 100 g

  • Energy 222 kcal / 100 g
    Info Energy-dense for its weight. [8]
  • Fiber 4.4 g / 100 g
    Strong A good source of fiber. [8]
subtotal+1
TOTAL 64Good

100 − 36 = 64

GTIN 00073731071502 · 2026-05-04

score v1.3.0 · kb 2026.10.11

Medium confidence

Same product, same score. Every time.

Nutrition per 100 g

Energy222 kcal
Fat2.2 g
Saturated fat0 g
Trans fat0 g
Carbohydrates44.4 g
Sugars4.4 g
Added sugars0 g
Fiber4.4 g
Protein4.4 g
Salt0.1 g

Serving: 3 tortillas (45 g)

Ingredients

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

CORN MASA FLOUR, WATER, CONTAINS 2% OR LESS OF: CELLULOSE GUM, GUAR GUM, PROPIONIC ACID, BENZOIC ACID AND PHOSPHORIC ACID (TO MAINTAIN FRESHNESS)

Allergens and diets

  • Vegan
  • Vegetarian
  • Gluten-free
  • Palm-oil-free

Always check the package: recipes change.

More from Mission

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. Benzene production from decarboxylation of benzoic acid in the presence of ascorbic acid and a transition-metal catalyst

    Journal of Agricultural and Food Chemistry · May 1993 · Peer-reviewed

    doi.org

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

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  7. 11. List of Permitted Preservatives (Lists of Permitted Food Additives)

    Health Canada · Oct 20, 2025 · Regulator

    “B.2 Butylated Hydroxyanisole n/a (a) Active dry yeasts (a) Preservative (a) 1,000 ppm n/a”

    canada.ca

  8. 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

  9. Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses

    BMJ · Feb 28, 2024 · Peer-reviewed

    “Greater exposure to ultra-processed food was associated with a higher risk of adverse health outcomes, especially cardiometabolic, common mental disorder, and mortality outcomes.”

    doi.org

  10. Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake

    Cell Metabolism · July 2019 · Peer-reviewed

    doi.org