Lasagna with meat sauce: a dish studied only as pasta

In a meta-analysis of 32 randomized trial comparisons with 2,448 adults, pasta eaten as part of low glycemic index diets lowered body weight by 1.4 lb (95% CI 0.93 to 1.9; metric: 0.63 kg, 0.42 to 0.84) against higher glycemic index diets. The authors found no trial of pasta on its own. We found no study in our corpus that tested lasagna with meat sauce as a dish, so that is as close as the science gets. It does not show that lasagna helps anyone lose weight. What we can say about the dish itself comes from composition tables. The single USDA record for frozen, prepared lasagna with meat sauce lists 7.28 g of protein, 373 mg of sodium and 15.9 micrograms of selenium per 3.5 oz (100 g), and a home recipe can differ a lot. A survey piece of frozen meat lasagna, about 206 g, carries about 255 calories and 715 mg of sodium, and a 250 g cup about 868 mg. Those portion figures come from the nearest USDA dish, recalculated from its 100 g values.

The numbers, per 3.5 oz (100 g)

How much is actually in it

• Per 100 g, prepared frozen lasagna with meat sauce in the USDA reference record carries 7.28 g of protein, 373 mg of sodium and 15.9 micrograms of selenium. — USDA SR Legacy reference record, lasagna with meat sauce, frozen, prepared; single record, no sample spread (n = 1 record) Evidence E source
  Protein 7.28 g, sodium 373 mg, selenium 15.9 ug per 3.5 oz (100 g)

What a real portion looks like

• One survey piece of frozen meat lasagna weighs about 7.3 oz (206 g) and carries about 255 calories and 715 mg of sodium, and a 250 g cup carries about 868 mg. — USDA FNDDS portion weights for lasagna with meat, frozen, food code 58130016 (n = 5 portion measures) Evidence E source
  7.3 oz (206 g) piece 255 calories and 715 mg sodium; 8.2 oz (232 g) piece 805 mg sodium; 250 g cup 868 mg sodium

What your body absorbs

• In 14 healthy men eating 3.5 oz (100 g) of pasta with olive oil and parmesan, slowly processed and normally processed pasta gave the same glucose, insulin and incretin responses. — 14 healthy male volunteers, two mixed-meal tests in randomized order, 100 g pasta with 10 g olive oil and 10 g parmesan (n = 14) Evidence B source
  No difference in glucose tolerance, insulin or incretin response; insulin curve mildly delayed with slowly processed pasta
• In a crossover trial in 20 healthy adults, pasta with 30% red sorghum flour lowered the 2-hour glucose response and cut energy intake at the next lunch by about 794 kJ versus durum wheat pasta. — healthy individuals (n = 20), three iso-caloric breakfasts each with 50 g available carbohydrate (n = 20) Evidence B source
  Glucose iAUC -651 mg/dL (-36.11 mmol/l) x min (95% CI -67.11 to -5.11); lunch energy -794.17 kJ (95% CI -1274.77 to -313.57)

What cooking and storage change

• By the USDA retention table for pasta boiled, drained and then baked, as in lasagna, about half of the folate and 45% of the thiamin in the noodles is lost, while zinc and vitamin B12 are kept. — USDA retention factors for the food group cereal grains and pasta, method pasta boiled, drained, baked Evidence E source
  Retained: folate 50%, thiamin 55%, niacin 60%, iron 75%, potassium 30%, zinc 100%, vitamin B12 100%

What it does to your health

• In a meta-analysis of 32 randomized trial comparisons with 2,448 adults, pasta eaten within low glycemic index diets lowered body weight by 1.4 lb (0.63 kg) versus higher glycemic index diets. — 32 trial comparisons, n=2448 participants, randomized controlled trials of 3 weeks or longer in adults (n = 2448) Evidence A source
  Body weight MD -1.4 lb (95% CI -1.9 to -0.93; metric: -0.63 kg, -0.84 to -0.42); BMI MD -0.26 kg/m2 (95% CI -0.36 to -0.16)

Safety, limits and interactions

• No study in our corpus has tested lasagna with meat sauce as a dish, so its effects on health, its safety and who should eat it differently are unknown beyond its pasta and sodium content. — Layers searched on 2026-10-02 for lasagna with meat sauce, lasagna, pasta and ready meal: USDA composition, CoFID, FNDDS, USDA retention R6, NHANES, 21 CFR 101, EU claim register, ODS, WHO, agency reports, drug interaction layer, ClinicalTrials.gov, PubMed corpus version pubmed:469432 (n = 0 corpus records under the dish name) Evidence E source
  Zero corpus records, zero trials, zero CoFID records, zero interaction entries under the dish name

What people believe that the data does not support

• The European Union refused the claim that carbohydrates in pasta give a low and slow blood sugar response, so pasta cannot be sold in Europe as a low glycemic index food on that basis. — European Union food labeling, claim on carbohydrates in pasta products Evidence E source
  Claim non-authorized

The bottom line

Two small trials looked at the pasta layer. In 14 healthy men, 3.5 oz (100 g) of pasta with olive oil and parmesan gave the same glucose, insulin and incretin responses whether the pasta was processed slowly or normally, in a single-meal pilot. In 20 healthy adults, a pasta made for the study with 30 percent red sorghum flour lowered the 2-hour glucose response by 651 mg/dL (36.11 mmol/l) x min (95% CI 5.11 to 67.11) against durum wheat pasta. It also cut energy eaten at the next lunch by about 794 kJ, after a single breakfast. About an ordinary lasagna that trial says nothing. Lasagna sheets are boiled, drained and then baked. USDA sets retention factors for that method across the whole pasta food group, in a table that dates to 1975. They keep about 50 percent of the folate, 55 percent of the thiamin and 75 percent of the iron, and all of the zinc and vitamin B12. Pasta cannot be sold in the European Union as a low glycemic index food on the strength of its carbohydrates. That claim was refused, which means the evidence fell short when it was assessed. The refusal does not show the effect is absent. Our search found zero studies and zero drug interaction entries under the dish name, so this page holds no fact about allergy, pregnancy, children or medicines for lasagna. If you are watching sodium, the per-piece figure above is the number to use.

Sources

1. lsgm-r8-01 · food composition data
   Lasagna with meat sauce, frozen, prepared, FDC 172114 (SR Legacy), per 100 g: Protein 7.28 g · Sodium, Na 373 mg · Selenium, Se 15.9 ug
   USDA FoodData Central, SR Legacy FDC 172114 · checked 2026-10-02
2. lsgm-r8-02 · portion data
   Lasagna with meat, frozen, FNDDS 58130016, fdc_id 2708754: Energy 124 KCAL and Sodium, Na 347 MG per 100 g · 1 piece (1/6 of 8" square) 206 g, 255.4 KCAL, 714.8 MG sodium · 1 piece (1/8 of 7" x 12") 232 g, 805.0 MG sodium · 1 cup 250 g, 867.5 MG sodium
   USDA FNDDS, food code 58130016, FDC 2708754 · checked 2026-10-02
3. lsgm-r8-05 · randomized crossover trial
   A total of 14 healthy male volunteers underwent two different mixed-meal tests in a randomized order. One meal was composed of 100 g of normally processed pasta and the other 100 g of slowly processed pasta. Each meal was completed with 10 g of olive oil and 10 g of parmesan cheese...Glucose tolerance, insulin, and incretin response were unaffected by the two different pasta types.
   Nutrients, 2021 · checked 2026-10-02
4. lsgm-r8-06 · randomized crossover trial
   The RSP meal resulted in significantly lower blood glucose response (-0.35 ± 0.09 mmol/l; 95% CI: -0.61 ~ -0.09; P = 0.005) and glucose iAUC over 120 min (-36.11 ± 10.53 mmol/l × min; 95% CI: -67.11 ~ -5.11; P = 0.017) compared to CP meal...Energy intake at ad libitum lunch was significantly lower after the RSP meal than after the CP meal (-794.17 ± 163.25 kJ; 95% CI: -1274.77 ~ -313.57; P = 0.001).
   Eur J Clin Nutr, 2025 · checked 2026-10-02
5. lsgm-r8-03 · retention factor data
   USDA-RETN-R6:382 PASTA,BOILED,DRAINED,BAKED (Cereal Grains and Pasta, group 20): potassium_mg 30% · sodium_mg 50% · folate_total_ug 50% · thiamin_mg 55% · niacin_mg 60% · iron_mg 75% · zinc_mg 100% · vitamin_b12_ug 100%
   USDA Table of Nutrient Retention Factors, Release 6 (2007), code 382 · checked 2026-10-02
6. lsgm-r8-04 · meta-analysis of RCTs
   We identified no trial comparisons of the effect of pasta alone and 32 trial comparisons (n=2448 participants) of the effect of pasta in the context of low-GI dietary patterns. Pasta in the context of low-GI dietary patterns significantly reduced body weight (MD=-0.63 kg; 95% CI -0.84 to -0.42 kg) and BMI (MD=-0.26 kg/m2; 95% CI -0.36 to -0.16 kg/m2) compared with higher-GI dietary patterns.
   BMJ Open, 2018 · checked 2026-10-02
7. lsgm-r8-08 · search record
   lasagna with meat sauce: corpus records 0 · CoFID 0 · FNDDS under the dish name 0 · USDA R6 under the dish name 0 · 21 CFR 101 0 · EU register 0 · WHO 0 · agency reports 0 · interaction layer 0 · ClinicalTrials.gov 0
   Bioma research layers, snapshot 2026-10-02 · checked 2026-10-02
8. lsgm-r8-07 · regulatory register entry
   POL-HC-6873 Carbohydrates in pasta products Kolhydrater i pasta ger ett lågt och långsamt blodsockersvar/har ett lågt glykemiskt index (GI). Carbohydrates in pasta products provide a low and slow blood sugar response/have a low glycaemic index (GI). Non-authorised
   EU Register on nutrition and health claims, claim POL-HC-6873, snapshot 2026-09-21 · checked 2026-10-02