Cake: after dinner it swings glucose more, and baked does not mean allergy-safe

A slice of cake is the same slice whenever you eat it, and the body does not treat it that way. In 17 healthy women aged about 21, with a BMI of 20.7, a 498 kcal slice of baked cake eaten after dinner raised the day's glucose swings to 3.54 mmol/L, against 2.73 mmol/L when the same cake was eaten mid-afternoon. They wore a continuous glucose monitor for 7 days. That is one day's swing in lean young women without diabetes, and it is the only trial on this page that fed people cake as cake. The rest is about cake as a member of a group. Across 17 prospective cohorts with more than 875 000 adults, refined grain intake was not associated with cardiovascular disease, with a hazard ratio of 1.08 (95 percent CI 0.99 to 1.18) and heterogeneity of 70 percent. That held in the analyses that pooled cakes, cookies and pastries with bread. What the word cake hides is the range. Across 44 USDA records, fat runs from 0.3 to 23.3 g per 100 g and saturated fat from 0.04 to 9.9 g, from angel food to frosted chocolate cake. The portion hides as much. US intake surveys record a slice of sponge cake at 65 g, a cupcake at 90 g and a slice of cream cake at 200 g, and those per-portion values are recalculated from 100 g rather than weighed.

The numbers, per 100 g

How much is actually in it

• Across 44 USDA cake records, fat runs from 0.3 to 23.3 g per 100 g and saturated fat from 0.04 to 9.9 g, so a single number for cake hides a 70-fold spread between angel food and frosted chocolate cakes. — USDA FoodData Central SR Legacy, 44 records in the Baked Products group matching cake (n = 44 records) Evidence E source
  Fat 0.3-23.3 g/100 g; saturated fat 0.043-9.921 g/100 g; reference record FDC 174933 fat 12.5 g, saturated 5.066 g

What a real portion looks like

• In 89 children aged 8 to 10, doubling the portion of loaf cake and other foods made bites 13% larger and reduced chewing cycles per gram by 8%, regardless of the child's weight status. — 89 children aged 8 to 10 years, United States, foods served in reference and double portions in randomized order (n = 89) Evidence B source
  Bite size +13% with double portion, chewing cycles per gram -8%; significant for loaf cake
• In US intake surveys a slice of sponge cake is recorded as 65 g while a slice of cream cake is 200 g and a cupcake 90 g. — USDA FNDDS 2021-2023 household measures, United States (n = 2 foods, 7 measures) Evidence E source
  Sponge cake slice 65 g, cup 50 g; cream cake slice 200 g, cupcake 90 g, cup 120 g

What your body absorbs

• In 12 healthy adults, vitamin D3 baked into a sponge cake was absorbed 26.6% better than the same dose in a biscuit, measured as the postprandial chylomicron response. — 12 healthy adults, randomized crossover postprandial trial, four model foods (n = 12) Evidence B source
  Sponge cake vitamin D3 response +26.6% vs biscuit (p = 0.047); no difference for lutein

What cooking and storage change

• Baking wheat-based foods such as cakes forms acrylamide, and a meta-analysis of 28 occurrence studies found acrylamide the highest of the three processing contaminants at 136.29 micrograms per kg. — 28 analytical studies of wheat-based foods (bread, cookies, pasta, cakes), pooled (n = 28 studies) Evidence D source
  Pooled acrylamide 136.29 µg/kg, HMF 70.59 µg/kg, PAHs 0.11 µg/kg

What it does to your health

• In 17 healthy young women, a 498 kcal slice of baked cake eaten after dinner raised the day's glucose swings to 3.54 mmol/L versus 2.73 mmol/L when the same cake was eaten mid-afternoon. — 17 healthy women aged about 21, BMI 20.7, continuous glucose monitoring for 7 days (n = 17) Evidence B source
  Mean amplitude of glycaemic excursions 3.54 vs 2.73 mmol/L, glucose SD 1.20 vs 0.92 mmol/L, post-dinner vs mid-afternoon (P < 0.05)
• Across 17 prospective cohorts with over 875,000 adults, refined grain intake including cakes and pastries was not associated with cardiovascular disease, with a pooled hazard ratio of 1.08 (95% CI 0.99 to 1.18). — 17 prospective cohort studies, more than 875,000 participants (n = >875,000) Evidence C source
  CVD HR 1.08 (95% CI 0.99-1.18, I2 70%, 9 cohorts); stroke HR 1.06 (0.92-1.23); heart failure HR 0.95 (0.77-1.16)

Safety, limits and interactions

• In 80,597 French women followed 8.8 years, cakes and pastries were among the main sources of dietary acrylamide, and the highest intake quartile had a hazard ratio for breast cancer of 1.21 (95% CI 1.00 to 1.47), rising to 1.40 (1.04 to 1.88) for premenopausal cancer. — 80,597 French women, NutriNet-Sante cohort, mean age 40.8, mean follow-up 8.8 years (n = 80,597) Evidence C source
  Breast cancer HR Q4 vs Q1 1.21 (95% CI 1.00-1.47); premenopausal 1.40 (1.04-1.88); no association postmenopausal
• Among 50 milk-allergic children at high risk of anaphylaxis, 36% reacted to a supervised baked milk challenge and 39% of those reactions were anaphylaxis, with a median reaction threshold of 138 mg of milk protein. — 50 children aged 12 months to under 6 years with cow's milk allergy, 66% with prior anaphylaxis, Spain (n = 50) Evidence C source
  Reaction in 36% of baked milk challenges, 39% of them anaphylaxis; median reactivity threshold 138 mg cow's milk protein

What people believe that the data does not support

• In a cluster randomised trial across 11 English secondary schools, labelling cakes and sweet biscuits with the exercise needed to burn their calories cut purchases by about 11 items per week per 100 students (adjusted mean difference -0.112, 95% CI -0.179 to -0.045). — 11 secondary schools in England, about 99,000 cake and biscuit purchase transactions, adolescents aged 11 and above (n = 11 schools, ~99,000 transactions) Evidence B source
  Purchases -0.112 items per student per week (95% CI -0.179 to -0.045, p = 0.005), about 11 fewer per 100 students

Who this works differently for

• In a pooled analysis of 27 observational studies of 30,805 preschool children in sub-Saharan Africa, eating sweet foods was linked to 2.55 times higher odds of overweight or obesity (95% CI 1.86 to 3.48). — preschool children aged 2 to 5 in sub-Saharan Africa, 27 studies, n = 30,805 (n = 30,805) Evidence C source
  Odds ratio 2.55 (95% CI 1.86-3.48) for overweight/obesity with sweet food consumption; this is an odds ratio, not a risk ratio
• Of 236 egg-allergic children challenged with one baked muffin containing 1 g of egg protein, 64% tolerated it, 36% reacted, and 14% of those who reacted had anaphylaxis, so cake containing egg is not automatically safe for egg-allergic children. — 236 egg-allergic children strictly avoiding egg, tertiary allergy clinic, 2009 to 2012 (n = 236) Evidence C source
  150/236 (64%) passed; 86 (36%) reacted; 12 of 86 (14%) anaphylaxis, four at under 100 mg heated egg protein
• In 84 milk-allergic children aged 6 months to 3 years who already tolerated baked milk, eating baked milk as muffin for 6 months then baked cheese for 6 months led 88.1% to tolerate unheated milk at 1 year versus 66.7% with strict avoidance. — 84 children aged 6 months to 3 years with cow's milk allergy who passed a baked milk muffin challenge, Iran (n = 84) Evidence B source
  Unheated milk tolerance at 1 year 88.1% (37/42) vs 66.7% (28/42), P = 0.018

What is still unknown

• In the Netherlands Cohort Study of 120,852 adults followed 13.3 years, each extra 10 micrograms of dietary acrylamide per day was not associated with colorectal, gastric, pancreatic or esophageal cancer (colorectal HR 1.00, 95% CI 0.96 to 1.06). — 120,852 men and women aged 55 to 69, Netherlands, 13.3 years of follow-up, case-cohort design (n = 120,852) Evidence C source
  Per 10 µg/d acrylamide: colorectal HR 1.00 (0.96-1.06), gastric 1.02 (0.94-1.10), pancreatic 1.06 (0.96-1.17), esophageal 0.96 (0.85-1.09)
• The EU acrylamide mitigation regulation sets benchmark levels for biscuits, wafers, scones and gingerbread as fine bakery wares, and the word cake does not appear in it, so no EU benchmark level for acrylamide in cake exists. — Commission Regulation (EU) 2017/2158, Article 1(2)(e) scope and Annex IV benchmark levels Evidence E source
  Benchmark levels: biscuits and wafers 350 µg/kg, crackers 400, crispbread 350, gingerbread 800, similar products 300; cakes absent

The bottom line

In 89 children aged 8 to 10, doubling the portion of loaf cake and other foods made bites 13 percent larger and cut chewing cycles per gram by 8 percent, whatever the child's weight status. That was one laboratory eating session that measured chewing rather than intake. In a cluster randomised trial across 11 English secondary schools, labelling cakes and sweet biscuits with the exercise needed to burn them cut purchases by about 11 items per week per 100 students (adjusted mean difference 0.112, 95 percent CI 0.045 to 0.179). That ran six weeks, counted purchases rather than what was eaten, and 7 of the 18 randomised schools did not take part. One narrow finding runs the other way. In 12 healthy adults, vitamin D3 baked into a sponge cake gave a 26.6 percent larger postprandial chylomicron response than the same dose in a biscuit (p = 0.047). The model foods were made to identical composition, and lutein showed no difference. Baking forms acrylamide, and what that means for people is open. A meta-analysis of 28 laboratory occurrence studies of wheat-based foods put pooled acrylamide at 136.29 micrograms per kg, the highest of three processing contaminants, with most samples being bread, cookies and pasta rather than cake. In 80 597 French women followed a mean 8.8 years, cakes and pastries were among the main sources of dietary acrylamide. The top intake quartile had a breast cancer hazard ratio of 1.21 (95 percent CI 1.00 to 1.47), a borderline figure, and 1.40 (1.04 to 1.88) for premenopausal cancer, from self-reported diet and composition tables. In 120 852 Dutch adults aged 55 to 69 followed 13.3 years, each extra 10 micrograms a day was not associated with colorectal, gastric, pancreatic or oesophageal cancer, with a colorectal hazard ratio of 1.00 (0.96 to 1.06). Two cohorts, two answers. The EU acrylamide regulation sets benchmark levels for biscuits, wafers, scones and gingerbread and never mentions cake, which says nothing about how much is in one. The cautions with numbers are about children with egg or milk allergy, and baked is not the same as safe. Of 236 egg-allergic children challenged in a clinic with one baked muffin holding 1 g of egg protein, 64 percent tolerated it and 36 percent reacted. Twelve of the 86 who reacted had anaphylaxis, four of them at under 100 mg of heated egg protein. Among 50 milk-allergic children under 6 selected for high risk, 66 percent with prior anaphylaxis, 36 percent reacted to a supervised baked milk challenge, 39 percent of those reactions were anaphylaxis, and the median threshold was 138 mg of milk protein. The same baked form is also how tolerance was built in one trial, and only in children who had first passed a supervised baked-milk challenge in a clinic. In 84 milk-allergic children aged 6 months to 3 years selected that way, eating it as a muffin for 6 months and then as baked cheese for 6 months brought 88.1 percent to tolerate unheated milk at 1 year. Strict avoidance gave 66.7 percent, in an open single-centre trial. In 27 observational studies of 30 805 preschool children in sub-Saharan Africa, sweet foods of all kinds were linked to 2.55 times the odds of overweight or obesity (95 percent CI 1.86 to 3.48), odds rather than risk, with heterogeneity of 99.4 percent. We have no card on cake in pregnancy or with any medicine, and none on wheat, nuts or any allergen other than egg and milk, though a cake may carry all of them.

Sources

1. cake-dv2-13 · reference dataset
   FDC 174933 Cake, cherry fudge with chocolate frosting (SR Legacy, Baked Products): Total lipid (fat) 12.5 g · Fatty acids, total saturated 5.066 g · across 44 cake records fat 0.3-23.3 g, saturated 0.043-9.921 g per 100 g
   USDA FoodData Central SR Legacy, release 2019-04 · checked 2026-09-23
2. cake-dv2-12 · randomized crossover
   The study was undertaken in 8- to 10-year-old children (n = 89)...In conclusion, the bite size of foods in 8- to 10-year-old children increases (13%) when the portion size is doubled and the larger bite size leads to fewer cycles/g (8%). These effects differ among foods. These parameters do not depend on weight status.
   J Texture Stud, 2023 · checked 2026-09-23
3. cake-dv2-14 · reference dataset
   FNDDS Cake, sponge (code 53118100, fdc_id 2707886): 1 piece/slice, any size 65 g · 1 cup 50 g. Cake, cream (code 53106500, fdc_id 2707872): 1 cupcake, any size 90 g · 1 piece/slice, any size 200 g · 1 cup 120 g
   USDA FNDDS 2021-2023 · checked 2026-09-23
4. cake-dv2-01 · RCT crossover
   Twelve healthy subjects are enrolled in a randomized, open label, crossover postprandial trial. Four different model foods are tested: custard, pudding, sponge cake, and biscuit...Sponge cake vitamin D3 response is higher than biscuit response (+26.6%, p = 0.047).
   Mol Nutr Food Res, 2020 · checked 2026-09-23
5. cake-dv2-05 · meta-analysis of food contaminant measurements
   Wheat is one of the main cereals grown around the world and is the basis for several foods such as bread, cakes and pasta...Of the 1479 results, 28 were included for a meta-analysis...The highest concentration was for acrylamide (136.29 µg·kg-1) followed by HMF (70.59 µg·kg-1) and PAHs (0.11 µg·kg-1).
   Crit Rev Food Sci Nutr, 2023 · checked 2026-09-23
6. cake-dv2-02 · RCT crossover
   In this randomized controlled three-treatment crossover study, 17 women...consumed sweet snacks (baked cake: 498 kcal; 53.6 g of carbohydrate, 8.0 g of protein, 28.0 g of fat) at 12:30 (post-lunch), 15:30 (mid-afternoon) and 19:30 (post-dinner)...The mean amplitude of glycaemic excursions (3.54 ± 0.32 vs. 2.73 ± 0.20 mmol/L; P < 0.05)...when the snack was eaten post-dinner were all significantly higher than with mid-afternoon snacking.
   Diabetes Metab, 2019 · checked 2026-09-23
7. cake-dv2-03 · meta-analysis of cohorts
   Meta-analyses of hazard ratios (HR) and 95% confidence intervals (CI) obtained from 17 prospective cohort studies (>875,000 participants) indicated that refined grain intake was not associated with risk of CVD (HR = 1.08, 95% CI, 0.99-1.18, I2 = 70%; 9 cohorts)...as well as for meta-analyses of studies that included both staple and indulgent grain foods (e.g., cakes, cookies, doughnuts, brownies, muffins, pastries).
   Trends Cardiovasc Med, 2024 · checked 2026-09-23
8. cake-dv2-06 · prospective cohort
   This prospective cohort study included 80,597 French females...The mean ± SD dietary acrylamide intake was 30.1 ± 21.9 µg/d (main contributors: coffee, potato fries and chips, pastries, cakes, bread)...(HR for quartile 4 compared with 1: 1.21; 95% CI: 1.00, 1.47) and a positive association was observed with premenopausal cancer (HRQ4vs.Q1: 1.40; 95% CI: 1.04, 1.88).
   Am J Clin Nutr, 2022 · checked 2026-09-23
9. cake-dv2-10 · prospective cohort
   The study population comprised 50 patients (66% with a history of anaphylaxis). A reaction was recorded during BM-OFC in 36% of patients (39% with anaphylaxis). The median reactivity threshold was 138 mg of CMP.
   J Investig Allergol Clin Immunol, 2026 · checked 2026-09-23
10. cake-dv2-11 · cluster RCT
    Schools were randomised on a 2:1 basis to display PACE labelling by cakes/sweet biscuits in canteens...There was a reduction in cake/biscuit purchases in intervention schools versus comparators of ~ 11 items per week per 100 students at follow-up (adjusted mean difference = -0.112, 95% CI [-0.179 to -0.045], p = 0.005).
    Int J Behav Nutr Phys Act, 2025 · checked 2026-09-23
11. cake-dv2-04 · meta-analysis of observational studies
    A total of 27 studies (n = 30,805) were included...consuming sweet foods (OR = 2.55; 95% CI: 1.86, 3.48)
    Adv Nutr, 2026 · checked 2026-09-23
12. cake-dv2-08 · prospective cohort
    Challenges were performed with incremental dosages to a total of one baked muffin containing 1/6 egg (equivalent to 1 g egg protein)...Open food challenge to baked egg were carried out on 236 egg-allergic children...A total of 150 children (64%) passed...Eighty-six children (36%) reacted to their challenge. Of these, 12 (14%) experienced anaphylaxis
    Pediatr Allergy Immunol, 2013 · checked 2026-09-23
13. cake-dv2-09 · RCT
    A randomized clinical trial was carried out with 84 patients (6 months-3 years old) diagnosed with allergy to cow's milk who tolerated baked milk in form of muffin in oral food challenge (OFC)...88.1% (37/42) of the patients in the case group and 66.7% (28/42) of those in control group had developed tolerance to unheated milk (P-value: 0.018).
    Pediatr Allergy Immunol, 2018 · checked 2026-09-23
14. cake-dv2-07 · prospective cohort
    In 1986, 120,852 men and women (aged 55-69 y) were included in the Netherlands Cohort Study on diet and cancer...A 10-microg/d increment of acrylamide intake was associated with multivariable-adjusted Cox proportional hazard rate ratios (HR) (95% CI) of 1.00 (0.96-1.06), 1.02 (0.94-1.10), 1.06 (0.96-1.17), and 0.96 (0.85-1.09) for colorectal, gastric, pancreatic, and esophageal cancer, respectively.
    J Nutr, 2008 · checked 2026-09-23
15. cake-dv2-15 · regulation
    (e) fine bakery wares: cookies, biscuits, rusks, cereal bars, scones, cornets, wafers, crumpets and gingerbread, as well as crackers, crisp breads and bread substitutes. In this category a cracker is a dry biscuit (a baked product based on cereal flour);
    Commission Regulation (EU) 2017/2158, Official Journal of the EU, 2017 · checked 2026-09-23