Corn chips: sodium varies, fat does not

In a randomized crossover trial in 20 adults with overweight, a 250 calories mid-morning snack of tortilla chips raised blood glucose and insulin significantly more than the same calories of pecans. Hunger ratings and the amount eaten at lunch did not differ. It was a single snack after a standard breakfast, so it tells you nothing about long-term health. Plain corn chips in the US survey database carry 535 calories, 33.1 g fat and 817 mg sodium per 3.5 oz (100 g), from one averaged profile with no range of samples. Sodium is the number that moves between entries. Plain chips give 817 mg per 3.5 oz (100 g), Fritos plain 514 mg and reduced sodium chips 295 mg, while fat stays near 33 to 34 g in all of them. A small single serving bag weighs 0.99 oz (28 g), a cup 45 g and a medium bag 57 g.

As people eat it, per 3.5 oz (100 g)

How much is actually in it

• Plain corn chips in the US survey database carry 535 calories, 33.1 g fat, 6.1 g protein, 4 g fiber and 817 mg sodium per 3.5 oz (100 g). — USDA FNDDS survey food 'Corn chips, plain', food code 54401021 Evidence E source
  Per 100 g: 535 calories, fat 33.1 g (saturated 4.3 g), protein 6.12 g, fiber 4.0 g, sodium 817 mg, calcium 137 mg
• Sodium spreads widely across corn chip entries in the same database: 817 mg per 3.5 oz (100 g) for plain, 514 mg for Fritos plain and 295 mg for reduced sodium chips, with fat near 33 to 34 g in all. — USDA FNDDS survey foods 'Corn chips, plain', 'Corn chips, plain (Fritos)', 'Corn chips, reduced sodium', 'Corn chips, flavored' Evidence E source
  Sodium 295 to 817 mg per 3.5 oz (100 g); energy 535 to 549 calories; fat 33.1 to 34.0 g

What a real portion looks like

• A small single serving bag of corn chips is 28 g in the US survey, about 150 calories and 229 mg sodium, while a medium bag is 57 g and a cup is 45 g. — USDA FNDDS portion weights for 'Corn chips, plain', food code 54401021 Evidence E source
  1 chip 1 g; small bag 28 g; 100 calorie pack 20 g; cup 45 g; medium bag 57 g; large bag 85 g; per-portion values recalculated from 100 g

What your body absorbs

• Phytate in maize limits calcium absorption from lime-treated tortillas: 5 women absorbed 50% of calcium from low-phytate maize tortillas versus 35% from ordinary maize. — 5 healthy adult women, about 140 g tortillas per test meal, dual stable isotope method (n = 5) Evidence C source
  Fractional calcium absorption 0.50 vs 0.35, P = 0.003

What cooking and storage change

• Alkaline cooking of maize (nixtamalization, the step used for masa) cut mycotoxins by 89 to 100% in moldy maize, taking fumonisins from 3332 to 166 micrograms per kg. — moldy and control maize processed into porridge for a 40-person study in Soweto, South Africa Evidence D source
  Fumonisin B1 + B2 3332 to 166 mcg/kg; 89 to 100% reduction across quantifiable mycotoxins

What it does to your health

• In a crossover trial in 20 adults with overweight, a 250 calories tortilla chip snack raised blood glucose and insulin more than the same calories of pecans, without changing hunger or lunch intake. — 20 adults aged 20 to 50 with BMI 27 to 40, single mid-morning snack after a standard breakfast (n = 20) Evidence B source
  Significantly higher post-snack glucose and insulin after tortilla chips than pecans; appetite ratings and ad libitum lunch energy not different
• In a Latin square trial in 5 adults, sugary and starchy snacks, including corn chips, caused significant drops in plaque pH. — 5 adult panelists with indwelling plaque pH telemetry, 10 snacks eaten over 2 minutes (n = 5) Evidence B source
  Significant decrease in interproximal plaque pH after starch snacks; gum chewing reduced demineralising potential
• In a randomized block study in 5 adults eating starchy snacks including corn chips, starting sugarless gum 5 minutes after the snack cut the acid challenge more than waiting 15 minutes. — 5 adults with plaque pH telemetry eating pretzels, potato chips, granola bars and corn chips (n = 5) Evidence B source
  Gum started at 5 min significantly reduced the acidogenic challenge versus gum at 15 min

Safety, limits and interactions

• A 2015 outbreak of vomiting and diarrhea at a Wyoming correctional facility was traced to rancid tortilla chips, with hexanal and peroxide found in the chips and no pathogen detected. — residents and staff of one correctional facility, onset 1 to 3 hours after lunch Evidence C source
  Tortilla chips the only food associated with illness in multivariate analysis
• Case reports describe corn chips cutting or perforating the esophagus, including in a child, and testing found about three pounds of force was needed to break a chip. — one child with esophageal perforation plus a rigidity test of three chip brands (n = 1) Evidence C source
  Mean fracture force about 3 lb for three brands
• Two adults seen within three months at one emergency department had esophageal lacerations from eating corn chips, both recovering without surgery. — 2 adults presenting with painful swallowing after corn chip ingestion (n = 2) Evidence C source
  Laceration confirmed by esophagram; full recovery with non-operative care

What people believe that the data does not support

• Corn chips contain no cholesterol in the US survey database, and 4.3 g of their 33.1 g total fat per 3.5 oz (100 g) is saturated. — USDA FNDDS survey food 'Corn chips, plain', food code 54401021 Evidence E source
  Cholesterol 0 mg per 3.5 oz (100 g); saturated fat 4.3 g of 33.1 g
• Tortilla chips fried in oil with added plant sterols (1.5 g a day in two 0.99 oz (28 g) servings) lowered LDL cholesterol by 15% over 4 weeks in 7 adults. — 7 human subjects, crossover, two 0.99 oz (28 g) servings a day for 4-week periods (n = 7) Evidence B source
  Plasma cholesterol -10%, LDL cholesterol -15%, HDL unchanged, versus the same chips without sterols

Who this works differently for

• Among 10,453 European children aged 6 to 9, each extra hour of screen time was linked to 32% higher odds of frequently eating chips, corn chips, popcorn or peanuts. — 10,453 children aged 6 to 9 years in five European countries (WHO COSI) (n = 10453) Evidence C source
  OR 1.32 (99% CI 1.20 to 1.45) per extra hour of screen time
• In US children aged 2 to 18 surveyed in 1989 to 1991, the potato chip, corn chip and popcorn group was among the top fat sources and supplied more than 2% of energy. — nationally representative sample of 4008 US children aged 2 to 18 years, 24-hour recalls (n = 4008) Evidence C source
  Snack chips group contributed >2% of energy intake

The bottom line

Corn chips have no cholesterol, 0 mg per 3.5 oz (100 g) in the survey database, with 4.3 g saturated fat in 33.1 g of total fat. Their effect on blood cholesterol was not measured. In a randomized crossover trial in 7 adults, tortilla chips fried in oil with added plant sterols lowered LDL cholesterol by 15 percent over 4 weeks against the same chips without sterols. Two 0.99 oz (28 g) servings a day gave 1.5 g of sterols. Those chips were made with sterols for the study, and seven people is very few. Two very small randomized studies of 5 adults each wore plaque pH sensors. Starchy snacks including corn chips caused significant drops in plaque pH, and chewing sorbitol gum afterward reduced that acid challenge. Starting the gum 5 minutes after the snack worked better than waiting 15 minutes. Plaque pH is a stand-in measure, and neither study counted cavities. We found no study of how nutrients are absorbed from corn chips themselves. In 5 women eating lime-treated maize tortillas, calcium absorption was 50 percent from low-phytate maize against 35 percent from ordinary maize. That was a non-randomized study of tortillas, which are not fried. Alkaline cooking of maize, the nixtamalization step used to make masa, cut fumonisins in moldy maize from 3332 to 166 micrograms per kg in laboratory analysis of porridge. Many corn chips use cornmeal that is not nixtamalized, while tortilla chips use masa, so that result may not apply to your bag. Who should be careful. Corn chips are hard, and case reports describe them cutting or perforating the esophagus, including in a child. In one report, about three pounds of force was needed to break a chip. In another, two adults seen at one emergency department within three months recovered without surgery. Case reports cannot tell you how often this happens. In 2015 an outbreak of vomiting and diarrhea at a Wyoming correctional facility was traced to rancid tortilla chips, a single outbreak. Among 10,453 European children aged 6 to 9, each extra hour of screen time was linked to 32 percent higher odds (99% CI 1.20 to 1.45) of often eating chips, corn chips, popcorn or peanuts. In US children surveyed in 1989 to 1991, the chip and popcorn group was among the top sources of fat. We found no study of interactions with medicines.

Sources

1. crch-r2-01 · food composition dataset
   Corn chips, plain, FNDDS code 54401021, fdc_id 2708196: Energy 535.0 KCAL, Total lipid (fat) 33.1 G, Fatty acids, total saturated 4.297 G, Protein 6.12 G, Fiber, total dietary 4.0 G, Sodium, Na 817.0 MG, Calcium, Ca 137.0 MG per 100 g
   USDA FoodData Central, FNDDS survey foods release 2024-10-31 · checked 2026-09-29
2. crch-r2-02 · food composition dataset
   fdc_id 2708196 Corn chips, plain: Sodium 817.0 MG, fat 33.1 G, Energy 535.0 KCAL; fdc_id 2708198 Corn chips, plain (Fritos): Sodium 514.0 MG, fat 33.36 G, Energy 539.0 KCAL; fdc_id 2708205 Corn chips, reduced sodium: Sodium 295.0 MG, fat 33.63 G, Energy 549.0 KCAL; fdc_id 2708197 Corn chips, flavored: Sodium 509.0 MG, fat 34.02 G, Energy 543.0 KCAL per 100 g
   USDA FoodData Central, FNDDS survey foods release 2024-10-31 · checked 2026-09-29
3. crch-r2-03 · food composition dataset
   Corn chips, plain, fdc_id 2708196: 1 chip 1 g; 1 small single serving bag 28 g; 1 medium single serving bag 57 g; 1 large single serving bag 85 g; 1 100 calorie package 20 g; 1 cup 45 g
   USDA FoodData Central, FNDDS survey foods release 2024-10-31 · checked 2026-09-29
4. crch-r2-09 · controlled feeding study
   Bioavailability of calcium is, however, compromised by phytate, which is present in large quantities in maize kernels and is only modestly reduced by nixtamalization.
   Am J Clin Nutr, 2005 · checked 2026-09-29
5. crch-r2-10 · food processing analysis
   Maize flour samples with initial fumonisin levels of 3332 µg/kg exceeding the regulatory limit were transformed through nixtamalization to a final concentration of 166 µg/kg, well below the allowable limit, highlighting the effectiveness of nixtamalization in reducing mycotoxin contamination below maximum levels.
   Toxins (Basel), 2025 · checked 2026-09-29
6. crch-r2-05 · randomized crossover trial
   VAS ratings, energy, food intake and macronutrient composition did not differ between treatment conditions, but glucose and insulin were significantly more elevated after tortilla chips.
   Nutrients, 2024 · checked 2026-09-29
7. crch-r2-06 · randomized crossover trial
   Results indicated that both the sugar- and starch-containing snacks tested in this study caused significant decreases in interproximal plaque pH.
   Am J Dent, 1990 · checked 2026-09-29
8. crch-r2-07 · randomized trial
   Results indicated that salivary stimulation caused by chewing sorbitol gum initiated after 5 min rather than waiting 15 min significantly reduced the acidogenic challenge induced by the snack foods.
   Pediatr Dent, 1993 · checked 2026-09-29
9. crch-r2-11 · case-control outbreak investigation
   Epidemiologic and laboratory evidence implicated rancid tortilla chips as the most likely source of illness.
   MMWR Morb Mortal Wkly Rep, 2016 · checked 2026-09-29
10. crch-r2-12 · case report
    The mean force of compression required to fracture the chips was approximately three pounds, a force great enough to damage the fragile structures of the upper aerodigestive system.
    Pediatr Emerg Care, 1993 · checked 2026-09-29
11. crch-r2-13 · case series
    Two patients presented to the emergency department within three months with a laceration of the esophagus due to corn chip ingestion.
    Ann Emerg Med, 1983 · checked 2026-09-29
12. crch-r2-04 · food composition dataset
    Corn chips, plain, fdc_id 2708196: Cholesterol 0.0 MG, Total lipid (fat) 33.1 G, Fatty acids, total saturated 4.297 G per 100 g
    USDA FoodData Central, FNDDS survey foods release 2024-10-31 · checked 2026-09-29
13. crch-r2-08 · randomized crossover trial
    During consumption of the phytosterol-enriched chips, significant reductions in plasma cholesterol (10%) and LDL cholesterol (15%) were achieved without affecting HDL-C.
    J Nutr, 2004 · checked 2026-09-29
14. crch-r2-14 · cross-sectional study
    'potato chips (crisps), corn chips, popcorn or peanuts' (1.32 [1.20;1.45])
    BMC Public Health, 2015 · checked 2026-09-29
15. crch-r2-15 · cross-sectional survey
    Many of the top 10 sources of carbohydrate (yeast bread, soft drinks/sodas, milk, ready-to-eat cereal, cakes/cookies/quick breads/donuts, sugars/syrups/jams, fruit drinks, pasta, white potatoes); protein (poultry, ready-to-eat cereal, pasta); and fat (potato chips/corn chips/popcorn) also contributed >2% each to energy intakes.
    Pediatrics, 1998 · checked 2026-09-29