Potato chips: what the trials and the cohorts actually measured

In a pilot trial on 20 healthy young adults, 1.6 oz (46 g) of potato chips a day for three weeks raised blood glucose and insulin after meals, while fasting glucose, fasting insulin and body weight did not change. The comparison group ate 1.5 oz (42 g) of mixed nuts rather than nothing, and three weeks is short. That small trial is the most direct evidence on this page. The number people quote about chips is observational. Across three US cohorts of 120,877 adults who were not obese at the start, each extra daily serving of potato chips went with 1.69 lb more weight gain every four years, the largest link for any single food in that analysis. It rests on self-reported food questionnaires, and other habits of heavy chip eaters can explain part of it. For scale, UK data put crisps fried in sunflower oil at 493 calories and 28.8 g of fat per 3.5 oz (100 g), most of it monounsaturated, and a small single-serving bag in the USDA database weighs 0.99 oz (28 g), a medium one 57 g.

The numbers, per 3.5 oz (100 g)

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

How much is actually in it

• UK composition data list potato crisps fried in sunflower oil at 493 calories, 28.8 g fat and 4.4 g fiber per 3.5 oz (100 g), with mostly monounsaturated fat. — UK food composition table Evidence C source
  Per 100 g: 493 calories, fat 28.8 g, saturated 2.48 g, monounsaturated 22.43 g, carbohydrate 55.8 g, AOAC fiber 4.4 g

What a real portion looks like

• In an RCT on 253 adults, portion stripes on potato chip cans had no overall effect, but among men the number eating more than one portion fell by 33%. — Study 1: N = 253 adults, laboratory, cans of potato chips (n = 253) Evidence B source
  Main effect not significant; men exceeding recommended portion fell by 33%
• A small single-serving bag of plain potato chips weighs 0.99 oz (28 g) in the USDA survey database, a medium bag 57 g and a large bag 85 g. — US dietary survey portion weights Evidence C source
  1 chip 2 g; small bag 28 g; medium bag 57 g; large bag 85 g; 1 cup 25 g

What your body absorbs

• In an RCT on 67 healthy men, olestra potato chips reduced absorption of dietary fat only slightly, by 1.2% at the highest 32 g dose. — 67 healthy male subjects after a 30-day adaptation, metabolic ward (n = 67) Evidence B source
  Triglyceride absorption reduced by 1.2% at 32 g olestra; dose-response
• In an RCT on 68 healthy men, olestra chips had no significant effect on vitamin A (retinyl palmitate) absorption, though the 32 g dose gave 81% of the placebo AUC. — 68 healthy male subjects after a 30-day adaptation eating 10 g olestra/d in potato chips (n = 68) Evidence B source
  No significant effect on AUC; mean AUC at 32 g olestra = 81% of placebo
• In a small crossover study on 5 men, vitamin C from potato chips (282 g giving 50 mg) raised plasma vitamin C similarly to vitamin C in water. — five healthy Japanese men aged 22-27 years, single dose after overnight fast (n = 5) Evidence C source
  Plasma VC not significantly different from VC in water (P = 0.14 and P = 0.5)

What cooking and storage change

• A Spanish market survey of 36 potato crisp samples found acrylamide averaging 740 ug/kg (81 to 2622), with children's exposure from crisps about 2.7 times that of adults per kg body weight. — 36 potato crisp samples from 16 producers, Spain 2008; Spanish adults and children 7-12 years (n = 36) Evidence C source
  Mean 740 ug/kg; exposure 0.053 (adults) vs 0.142 (children) ug/kg bw/day
• Laboratory data suggest acrylamide forms in fried potato products mainly through the Maillard reaction, and L-asparaginase is the most used additive to cut it in potato products. — food processing studies (no human subjects) Evidence D source
  Qualitative

What it does to your health

• Observational data link each extra daily serving of potato chips with 1.69 lb more weight gain over 4 years, the strongest single food association in three US cohorts. — 120,877 US women and men free of chronic disease and not obese at baseline, followed 1986-2006 (n = 120877) Evidence C source
  +1.69 lb per 4 years per increased daily serving (P<=0.005)
• In an RCT on 20 healthy young adults, 1.6 oz (46 g) of potato chips daily for 3 weeks raised postprandial glucose and insulin, while fasting values did not change. — 20 healthy young adults randomized to 42 g mixed nuts or 46 g potato chips daily for 3 weeks (n = 20) Evidence B source
  Postprandial glucose and insulin increased with chips (P < .05); no change in fasting glucose, insulin or body weight

Safety, limits and interactions

• Observational data from 16 studies with 1,151,189 participants found no link between high dietary acrylamide and site-specific cancer, except lung cancer in smokers. — non-occupationally exposed adults in 16 cohort studies, median follow-up 14.9 years (n = 1151189) Evidence C source
  No association highest vs lowest acrylamide for each site; no dose-response threshold

What people believe that the data does not support

• In a double-blind RCT on 1123 cinema-goers, olestra potato chips caused no more GI symptoms than regular chips: 15.8% vs 17.6% reported any symptom. — 1123 volunteers aged 13 to 88 years eating a 369-g bag ad libitum during a movie (n = 1123) Evidence B source
  Difference -1.8 percentage points (95% CI -6.2 to 2.7), P=.47
• In a double-blind crossover RCT on 20 adults, regular potato chips were rated higher for liking and craving and people worked harder to get them than a low-fat, low-sodium vegetable chip. — 20 participants in a laboratory setting, four sessions (n = 20) Evidence B source
  Higher liking, wanting, craving (p = .011-.0001); lower demand elasticity and higher break point (p < .0001)

Who this works differently for

• In an RCT on 129 students, induced worry increased potato chip intake with a small effect size (d = 0.32). — 129 undergraduate students (67.4 % cisgender women, mean age 19.87) (n = 129) Evidence B source
  D = .32 for potato chips (p = .039)
• In a crossover RCT on 40 children aged 9-14, a 180 calories potato chip snack led to the same later food intake as cheese, yogurt, milk or cookies. — 40 children aged 9-14 years, isoenergetic 180 calories snacks (n = 40) Evidence B source
  Food intake at 120 min did not differ between snacks (P = 0.15)

The bottom line

A good part of the research is about why a bag disappears. In a double-blind crossover pilot on 20 adults, regular chips were liked, wanted and craved more than a low-fat, low-sodium vegetable chip, and people worked harder to earn them, which measures reward in a lab and says nothing about addiction. In 129 students, a task that made them worry raised chip intake with a small effect (d = 0.32) in a single session. Portion stripes printed on chip cans were tested on 253 adults. Among men, the number eating more than one recommended portion fell by 33%, a subgroup result. In 40 children aged 9 to 14, a 180 calories chip snack led to the same food intake two hours later as the same calories from cheese, yogurt, milk or cookies (P = 0.15). The olestra chips of the 1990s have their own myth. In a double-blind trial on 1123 cinema-goers aged 13 to 88, 15.8% reported a stomach or bowel symptom after olestra chips and 17.6% after regular ones, a difference of -1.8 points (95% CI -6.2 to 2.7) in a single sitting. In 67 healthy men, 1.1 oz (32 g) of olestra cut absorption of dietary fat by 1.2%. In 68 men, vitamin A absorption did not change significantly, though the 32 g group reached 81% of the placebo value on average. The cautions here are about acrylamide, which forms when potatoes are fried. A Spanish survey of 36 crisp samples from 2008 found 740 micrograms per kg on average (81 to 2622). The authors estimated that children aged 7 to 12 took in 0.142 micrograms per kg of body weight a day from crisps against 0.053 for adults, one country and one year only. Pooled cohorts of 1,151,189 adults found no link between the highest and lowest dietary acrylamide and any single cancer site studied apart from lung cancer in smokers, with intake estimated from questionnaires. We have no card on the salt in chips, or on allergy, pregnancy or medicines.

Compared with other foods

Sources

1. pchp-daily-r8-15 · dataset
   Energy (kcal) 493; Fat (g) 28.8; Satd FA /100g fd (g) 2.48; Mono FA /100g food (g) 22.43; Carbohydrate (g) 55.8; AOAC fibre (g) 4.4
   CoFID 2021 (Public Health England), code 17-671, Potato crisps, fried in sunflower oil; OGL v3.0 · checked 2026-09-29
2. pchp-daily-r8-09 · RCT
   In Study 1, men were more likely to eat the whole can of potato chips than women but significantly reduced consumption when visual cues were on the pack. The effect size was large: the number of men eating more than the recommended portion fell by 33%.
   Ann Behav Med, 2021 · checked 2026-09-29
3. pchp-daily-r8-14 · dataset
   1 chip: 2 g; 1 small single serving bag: 28 g; 1 medium single serving bag: 57 g; 1 large single serving bag: 85 g; 1 cup: 25 g
   USDA FNDDS 2021-2023, food code 71200100 (fdc_id 2709422), Potato chips, plain · checked 2026-09-29
4. pchp-daily-r8-04 · RCT
   Olestra had a slight but significant dose-response effect on triglyceride absorption: the highest olestra dose (32 g) reduced absorption by 1.2%.
   J Nutr, 1997 · checked 2026-09-29
5. pchp-daily-r8-05 · RCT
   There was no significant effect on retinyl palmitate absorption as determined from the area under the plasma 3H-retinyl esters concentration-time curve. However, an area under the plasma concentration-time curve in the 32-g olestra group that was 81% (mean value) or 70% (median value) of the area under the curve for the placebo group suggested that olestra may have affected retinyl palmitate absorption.
   J Nutr, 1997 · checked 2026-09-29
6. pchp-daily-r8-06 · crossover study
   five healthy Japanese men between 22 and 27 years of age consumed 87 g mashed potatoes and 282 g potato chips. Each portion contained 50 mg of VC
   Br J Nutr, 2012 · checked 2026-09-29
7. pchp-daily-r8-11 · food analysis survey
   An average level of 740 microg kg(-1) (ranging from 81 to 2622 microg kg(-1); minimum to maximum) and a median of 592 microg kg(-1) were obtained.
   Food Addit Contam Part A Chem Anal Control Expo Risk Assess, 2009 · checked 2026-09-29
8. pchp-daily-r8-13 · systematic review, food chemistry
   According to the compiled information, the first route causing AA formation is the Maillard reaction. ... The L-asparaginase is more widely used in potato products.
   Crit Rev Food Sci Nutr, 2024 · checked 2026-09-29
9. pchp-daily-r8-01 · pooled prospective cohorts
   4-year weight change was most strongly associated with the intake of potato chips (1.69 lb), potatoes (1.28 lb), sugar-sweetened beverages (1.00 lb)
   N Engl J Med, 2011 · checked 2026-09-29
10. pchp-daily-r8-02 · RCT
    Twenty participants were randomized to consume either 42 g of mixed nuts or 46 g of potato chips daily for 3 weeks. Mixed nut consumption did not alter postprandial blood glucose and insulin, while potato chip consumption increased glucose and insulin (P < .05).
    J Med Food, 2023 · checked 2026-09-29
11. pchp-daily-r8-12 · meta-analysis of cohorts
    Pooled analysis showed no association between the highest vs. lowest dietary acrylamide exposure and each site-specific cancer investigated, with no evidence of thresholds in the dose-response meta-analysis.
    Front Nutr, 2022 · checked 2026-09-29
12. pchp-daily-r8-03 · RCT
    Of 563 evaluable subjects in the olestra chip group, 89 (15.8%) reported 1 or more GI symptoms, while 93 (17.6%) of the 529 evaluable subjects in the regular TG chip group did so (difference in symptom frequency between olestra and TG, -1.8; 95% confidence interval, -6.2 to 2.7; P=.47).
    JAMA, 1998 · checked 2026-09-29
13. pchp-daily-r8-07 · RCT, crossover
    Full-dose chips were rated significantly higher on liking, wanting, craving, and willingness to eat again, versus negative control (p = .011-.0001). Participants exhibited lower demand elasticity for the full-dose chips (p < .0001), and higher break point (p < .0001)
    Exp Clin Psychopharmacol, 2026 · checked 2026-09-29
14. pchp-daily-r8-08 · RCT
    Primary analyses revealed that participants in the worry condition consumed significantly more potato chips (p = .039, d = .32) and total food (p = .032, d = .33) compared to the control condition.
    Appetite, 2026 · checked 2026-09-29
15. pchp-daily-r8-10 · RCT, crossover
    FI did not differ between snacks (P = 0.15).
    Appl Physiol Nutr Metab, 2021 · checked 2026-09-29