Potato wedges: the risk signal follows the fryer

In a crossover trial in 33 healthy nonobese adults, a meal built on potato wedges was no more filling than a pasta meal of the same energy, and people ate the same amount at their next meal. That is one acute trial, reported in an abstract with no numbers for the wedges arm. In another crossover trial in 26 healthy adults, meals with baked French fries, the closest tested cousin of oven wedges, led people to eat 13 to 16% less total energy than the same meals with rice, with higher blood glucose after the fries. The longer-term signal is observational and depends on cooking. Across 13 cohorts with 587,081 people, each extra three weekly servings of fried potatoes went with 16% higher type 2 diabetes risk (HR 1.16, 95% CI 1.09 to 1.23). Baked, boiled or mashed potatoes showed no clear link in three US cohorts (HR 1.01, 95% CI 0.98 to 1.05). The questionnaires did not separate wedges from fries, so only deep-fried wedges clearly fall in the fried group.

How much is actually in it

• UK data put retail cooked potato wedges at 176 calories and 5.5 g fat per 3.5 oz (100 g), against 145 calories and 3.8 g fat for homemade wedges cooked in sunflower oil. — CoFID 2021 records 13-483 (retail, cooked) and 13-566 (homemade, with skin, sunflower oil) (n = 2 records) Evidence E source
  Retail: 176 calories, fat 5.5 g, trans fat 0.27 g, fiber (AOAC) 4.3 g per 3.5 oz (100 g). Homemade: 145 calories, fat 3.8 g, trans fat trace, fiber (AOAC) 3.0 g, potassium 702 mg per 3.5 oz (100 g)
• USDA lists frozen potato wedges at 0.35 mg vitamin B6 and 11.2 mg vitamin C per 3.5 oz (100 g), while the UK retail record, cooked rather than frozen, has 0.1 mg B6. — USDA SR Legacy FDC 168443 (frozen) vs CoFID 13-483 (retail, cooked) (n = 2 records) Evidence E source
  Vitamin B6 0.35 vs 0.1 mg, niacin 1.54 vs 2.2 mg per 3.5 oz (100 g); vitamin C 11.2 mg (12% DV) in USDA

What your body absorbs

• In a trial in 37 women, about a quarter of the zinc in regular potatoes was absorbed, 25.5% on average. — 37 women in the Peruvian Highlands (n = 37) Evidence B source
  Fractional zinc absorption 25.5% (SD 7.0%) from regular potatoes vs 20.8% (SD 5.4%) from biofortified potatoes (P < 0.01)
• In a trial in 28 women with low iron stores, 16.6% of the iron in a regular potato meal was absorbed, about 0.24 mg from a 16 oz (460 g) meal. — Women (n = 28; mean ± SD plasma ferritin 21.3 ± 3.3 mcg/L) (n = 28) Evidence B source
  Fractional iron absorption 16.6% (95% CI 14.0-19.6%) from nonbiofortified potatoes, total 0.24 mg (0.20-0.28 mg) per 460 g meal

What cooking and storage change

• Lab tests on thin potato slices found oven baking at 170 C made more than twice the acrylamide of frying at the same temperature, while at 180 and 190 C baked slices had less. — Potato slices 1.4 mm thick, baked or fried at 170, 180 and 190 C Evidence D source
  Baked 47.8 vs fried 19.6 ng/g at 170 C; baked 19.3 vs fried 39 ng/g at 180 C; baked 29.7 vs fried 95 ng/g at 190 C
• In lab-cooked potato sticks, soaking before cooking lowered acrylamide in air-fried, deep-fried and oven-fried potatoes, and oven frying gave the lowest average level. — Potato sticks, washed or soaked, cooked by air frying, deep frying and oven frying Evidence D source
  Air fryer 12.19 ± 7.03, deep frying 8.94 ± 9.21, oven 7.43 ± 3.75 mcg/kg (difference not significant); soaking lowered acrylamide, significant for deep frying (p = 0.029)

What it does to your health

• In a crossover trial in 33 healthy adults, an energy-matched meal built on potato wedges was no more filling than a pasta meal, and later food intake was the same. — Thirty-three healthy nonobese men and women (n = 33) Evidence B source
  Satiety ratings after potato wedges did not differ overall from pasta control; energy intake at a later ad libitum meal comparable across all test meals
• In a crossover trial in 26 healthy adults, meals with baked French fries led people to eat 13 to 16% less total energy than the same meals with rice. — 26 (13 males and 13 females) healthy adults (age: 18-45 y; body mass index [kg/m2]: 18.5-29.9) (n = 26) Evidence B source
  13-16% less total energy (calories) after baked French fries and instant mashed potato meals than after rice meals (P < 0.0001)
• Observational data from 13 cohorts link each extra three weekly servings of fried potatoes with 16% higher type 2 diabetes risk, while baked, boiled or mashed potatoes showed no clear link. — 13 cohorts (587 081 participants and 43 471 diagnoses of T2D) (n = 587081) Evidence C source
  HR 1.16 (95% CI 1.09 to 1.23) per 3 servings/week of fried potatoes; baked, boiled or mashed pooled HR 1.01 (0.98 to 1.05) in three US cohorts
• Observational data from 103 studies link the highest fried potato intake with 16% higher diabetes risk, while total potato intake showed no link with heart disease or stroke. — Fifty-one articles (103 studies), observational (n = 103 studies) Evidence C source
  Fried potatoes and diabetes RR 1.16 (95% CI 1.04-1.30); total potatoes and CVD RR 0.97 (0.91-1.03), stroke 0.97 (0.88-1.06)
• Observational data from five cohorts link eating fried potatoes at least once a week with 10% higher hypertension risk, and seven cohorts showed no link to cardiovascular disease. — seven cohorts for CVD (n = 110,063) and five cohorts for HTN (n = 67,146) (n = 110063) Evidence C source
  HTN 10% higher (95% CI 4% to 17%) for 1+ servings/week vs no fried potatoes; total potatoes 5+ servings/week vs none HR 0.96 (0.89-1.04) for CVD

Safety, limits and interactions

• The FDA advises cooking cut potato products to golden yellow rather than brown and soaking raw slices for 15 to 30 minutes to cut acrylamide. — Consumers preparing cut potato products at home Evidence E source
  Qualitative advice, no size of reduction given
• Observational data from eight studies found no clear link between dietary acrylamide and kidney cancer, with a relative risk of 1.12 that crossed no effect. — eight studies, 2843 cases, and 309 920 controls/participants (n = 312763) Evidence C source
  RR 1.12 (95% CI 0.97-1.28), highest vs lowest acrylamide intake

What people believe that the data does not support

• The EU refused to authorize the claim that potato protein isolate increases satiety, reduces appetite or supports weight control. — EU Register on nutrition and health claims Evidence E source
  Status Non-authorized
• The EU refused to authorize the claim that a potato extract product helps overweight people lose body weight. — EU Register on nutrition and health claims Evidence E source
  Status Non-authorized

Who this works differently for

• Observational data from five studies of 53,870 mother and newborn pairs link the highest acrylamide exposure in pregnancy with 20% higher odds of a small for gestational age baby. — five original studies, 53,870 mother-newborn pairs (n = 53870) Evidence C source
  Highest AA-Hb quartile: OR 1.20 (95% CI 1.08-1.33) for SGA, birth weight -131 g (95% CI -204 to -58)

The bottom line

UK data put retail cooked wedges at 176 calories, 5.5 g fat and 0.27 g trans fat per 3.5 oz (100 g), against 145 calories, 3.8 g fat and a trace of trans fat for homemade wedges with skin cooked in sunflower oil. The homemade record also lists 702 mg potassium per 3.5 oz (100 g). Each figure comes from a single record without spread, and the retail product's 2.49 g saturated fat against 0.47 g suggests a different frying fat. USDA frozen wedges list 0.35 mg vitamin B6 and 11.2 mg vitamin C per 3.5 oz (100 g), and the UK retail record has 0.1 mg B6. One of those records is frozen and uncooked and the other cooked, so they may not describe the same food. We have no standard US portion size for wedges. Across 103 observational studies, the highest fried potato intake went with 16% higher diabetes risk (RR 1.16, 95% CI 1.04 to 1.30), and total potato intake showed no link with cardiovascular disease or stroke. In five pooled cohorts of 67,146 people, eating fried potatoes at least once a week went with 10% higher risk of high blood pressure (95% CI 4% to 17%), with no link to cardiovascular disease. In 37 Peruvian women eating 18 oz (500 g) portions of boiled regular potatoes, 25.5% of the zinc was absorbed on average. In 28 women with low iron stores, 16.6% of the iron in a 460 g potato meal was absorbed, about 0.24 mg. Those were large portions of a plain staple, far from a side of wedges. The FDA says cooking cut potato products to golden yellow instead of brown, and soaking raw slices in water for 15 to 30 minutes before frying or roasting, helps reduce acrylamide, without giving a size. Lab tests found soaking lowered acrylamide in potato sticks, significantly only for deep frying, and the differences between air frying, deep frying and oven frying did not reach significance. On 1.4 mm chips, baking at 170 C made more than twice the acrylamide of frying, while at 180 and 190 C baked chips had less. We found no acrylamide measurement on wedges, which are much thicker. For pregnancy, observational data from five studies of 53,870 mother and newborn pairs link the highest acrylamide exposure, from all foods, with 1.20 times the odds of a small for gestational age baby (95% CI 1.08 to 1.33) and birth weight 131 g lower. For kidney cancer, eight studies found no clear link with dietary acrylamide (RR 1.12, 95% CI 0.97 to 1.28). We have no cards on children or on interactions with medicines. The EU refused claims that potato protein isolate aids satiety and that a branded potato extract helps weight loss, both far from a plate of wedges.

Sources

1. pwg-r5-13 · CoFID 2021, dataset
   Potato wedges, retail, cooked (CoFID 13-483): Energy 176 kcal, Fat 5.5 g, Trans FAs 0.27 g, AOAC fibre 4.3 g per 100 g; Potatoes, old, potato wedges, with skin, cooked in sunflower oil, homemade (CoFID 13-566): Energy 145 kcal, Fat 3.8 g, Trans FAs Tr, AOAC fibre 3.0 g, Potassium 702 mg per 100 g
   CoFID 2021, Public Health England, OGL v3.0, codes 13-483 and 13-566 · checked 2026-09-29
2. pwg-r5-14 · USDA FoodData Central SR Legacy and CoFID 2021, dataset
   Potato wedges, frozen (Includes foods for USDA's Food Distribution Program) (FDC 168443, SR Legacy): vitamin B6 0.35 mg = 21% DV; vitamin C 11.2 mg = 12% DV; niacin 1.54 mg = 10% DV; Foundation samples 0; CoFID 13-483 vitamin B6 0.1 mg, niacin 2.2 mg
   USDA FoodData Central, SR Legacy, FDC 168443 · checked 2026-09-29
3. pwg-r5-03 · Randomized crossover trial, stable isotopes
   We undertook a single-blinded randomized crossover study (using 67Zn and 70Zn stable isotopes) in which 37 women consumed 500-g biofortified or regular potatoes twice a day. ... Mean fractional zinc absorption (FZA) from the biofortified potatoes was lower than from the regular potatoes, 20.8% (SD: 5.4%) and 25.5% (SD: 7.0%), respectively (P < 0.01).
   J Nutr, 2023 · checked 2026-09-29
4. pwg-r5-04 · Randomized crossover trial, stable isotopes
   Women (n = 28; mean ± SD plasma ferritin 21.3 ± 3.3 μg/L) consumed 10 meals (460 g) of both potatoes, each meal extrinsically labeled with either 58Fe sulfate (biofortified) or 57Fe sulfate (nonfortified), on consecutive days. ... Geometric mean (95% CI) fractional iron absorption from the iron-biofortified clone and the nonbiofortified variety were 12.1% (10.3%-14.2%) and 16.6% (14.0%-19.6%), respectively (P < 0.001). Total iron absorption from the iron-biofortified clone and the nonbiofortified variety were 0.35 mg (0.30-0.41 mg) and 0.24 mg (0.20-0.28 mg) per 460 g meal, respectively (P < 0.001).
   J Nutr, 2023 · checked 2026-09-29
5. pwg-r5-08 · Food chemistry experiment
   The results showed that baking at 170 degrees C more than doubled the acrylamide amount that formed upon frying at the same temperature, whereas at 180 and 190 degrees C, the acrylamide levels of chips prepared by baking were lower than their fried counterparts.
   Journal of Food Science, 2010 · checked 2026-09-29
6. pwg-r5-09 · Food chemistry experiment
   The highest acrylamide content was found in potatoes cooked using the air fryer (12.19 ± 7.03 μg/kg). ... The acrylamide content of the potatoes that were subjected to soaking in all three ways was lower than the potatoes that were not soaked and only washed.
   Frontiers in Nutrition, 2023 · checked 2026-09-29
7. pwg-r5-01 · Randomized crossover trial
   This study used a randomized crossover design to assess the impact of 4 equi-energy potato-based meals (fried French fries, baked potato, mashed potato, or potato wedges) on subjective satiety sensations (visual analogue scale [VAS] ratings) and subsequent energy intake (ad libitum meal [kcal]), compared to a control pasta-based meal. Thirty-three healthy nonobese men and women participated in the study. RESULTS: VAS ratings indicated that the meal containing fried french fries was perceived to be substantially more satiating than the equi-energy pasta control meal, with all other potato-based meals not differing overall from control. All test meals had a comparable effect on energy intake at a later ad libitum meal.
   J Am Coll Nutr, 2016 · checked 2026-09-29
8. pwg-r5-02 · Randomized crossover trial
   In a randomized, single-blinded, crossover design, 26 (13 males and 13 females) healthy adults (age: 18-45 y; body mass index [kg/m2]: 18.5-29.9) consumed isocaloric fixed amounts of either meatballs or vegetarian-substitute balls with ad libitum access to either baked French fries (BFF), instant mashed potatoes (IMPs), or rice (control). ... Participants consumed 23-25% less treatment meal energy (kcal), 32-34% less CHO energy (kcal), and 13-16% less total energy (kcal) after the BFF and IMP than rice meals (P < 0.0001).
   J Nutr, 2024 · checked 2026-09-29
9. pwg-r5-05 · Meta-analysis of prospective cohorts
   Intake of combined baked, boiled, or mashed potatoes was not significantly associated with T2D risk (pooled hazard ratio 1.01, 95% CI 0.98 to 1.05). ... In a meta-analysis of 13 cohorts (587 081 participants and 43 471 diagnoses of T2D), the pooled hazard ratio for risk of T2D with each increment of three servings weekly of total potato was 1.03 (95% CI 1.02 to 1.05) and of fried potatoes was 1.16 (1.09 to 1.23).
   BMJ, 2025 · checked 2026-09-29
10. pwg-r5-06 · Meta-analysis of observational studies
    Fifty-one articles (103 studies) were identified in the current meta-analysis. Comparing the highest with the lowest categories of total potato intake, total potato intake was not associated with hypertension (summary RR = 1.07; 95% CI: 0.95, 1.21), diabetes (1.08; 95% CI: 0.96, 1.22), GDM (1.16; 95% CI: 0.86, 1.57), CHD (1.00; 95% CI: 0.99, 1.02), CVD (0.97; 95% CI: 0.91, 1.03), or stroke (0.97; 95% CI: 0.88, 1.06); fried potato intake was not associated with overweight/obesity (1.24; 95% CI: 0.90, 1.70) or GDM (1.03; 95% CI: 0.97, 1.09) but was significantly associated with increased diabetes risk (1.16; 95% CI: 1.04, 1.30)
    Nutr Rev, 2025 · checked 2026-09-29
11. pwg-r5-07 · Pooled analysis of prospective cohorts
    We conducted a meta-analysis using data from seven cohorts for CVD (n = 110,063) and five cohorts for HTN (n = 67,146). ... while fried potato consumption was not associated with CVD risk, there was a 10% higher risk of HTN (95% CI: 4% to 17%) comparing 1+ servings/week to no fried potato intake.
    Nutrients, 2025 · checked 2026-09-29
12. pwg-r5-10 · Agency guidance
    Cooking cut potato products, such as frozen French fries or potato slices, to a golden yellow color rather than a brown color helps reduce acrylamide formation. ... Soaking raw potato slices in water for 15-30 minutes before frying or roasting helps reduce acrylamide formation during cooking.
    US FDA, Acrylamide and Diet, Food Storage, and Food Preparation, 2024 · checked 2026-09-29
13. pwg-r5-12 · Meta-analysis of observational studies
    This meta-analysis study included eight studies, 2843 cases, and 309 920 controls/participants. ... No meaningful association was found for renal cell carcinoma; RR was 1.12 (95% confidence interval (CI): 0.97-1.28).
    J Sci Food Agric, 2020 · checked 2026-09-29
14. pwg-r5-15 · EU claims register
    POL-HC-7796 Potato protein isolate Increases the sense of satiety Elicit satiety Reduces appetite Supports weight control Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-7796, snapshot 2026-09-21 · checked 2026-09-29
15. pwg-r5-16 · EU claims register
    POL-HC-8425 Slendesta® Potato Extract Slendesta® contributes to the reduction of body weight in overweight individuals -/- Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-8425, snapshot 2026-09-21 · checked 2026-09-29
16. pwg-r5-11 · Meta-analysis of observational studies
    Out of 169 records identified, five original studies were eligible, including 53,870 mother-newborn pairs in total. ... Higher risk of SGA and lower birth weight and head circumference were observed in the highest quartile of AA-Hb [odds ratio (OR): 1.20 (95% CI: 1.08; 1.33); mean difference (MD): -131 g (95% CI: -204; -58) and -0.31 cm (95% CI: -0.58; -0.04), respectively]
    Environ Res, 2022 · checked 2026-09-29