Sweet and sour sauce: sugar and salt, with vinegar science borrowed from its sour half

We found no human study of sweet and sour sauce itself, so the strongest evidence here belongs to vinegar, its sour ingredient. A meta-analysis of 16 randomized trials in 910 adults gave 750 to 3600 mg of acetic acid a day from vinegar-type foods for about 8 weeks. In people with type 2 diabetes fasting glucose fell by about 36 mg/dL (95% CI 7.7 to 63.8 lower), with most trials at unclear or high risk of bias and doses far above what a tablespoon of sauce contains. HbA1c and BMI did not change. These doses are what the trials tested, not an amount to take, and we have no card on vinegar alongside diabetes medicines or on its safety with daily use at these doses. What the sauce itself reliably delivers is sugar and salt. The UK table puts take-away sweet and sour sauce at 157 calories and 27.5 g of total sugars per 3.5 oz (100 g). Sodium depends on the recipe: 150 mg per 3.5 oz (100 g) in that UK take-away record, 539 mg in the USDA ready-to-serve one.

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

How much is actually in it

• USDA lists ready-to-serve sweet and sour sauce at 539 mg sodium and 38.2 g carbohydrate per 3.5 oz (100 g). The second USDA record runs 347 mg sodium and 16.7 g carbohydrate. — USDA SR Legacy food Sauce, sweet and sour, ready-to-serve (FDC 174066) (n = 2 records) Evidence E source
  Sodium 347-539 mg and carbohydrate 16.7-38.2 g per 3.5 oz (100 g) across the two USDA records

What a real portion looks like

• US survey portions for sweet and sour sauce are 9 g for a packet, 16 g for a tablespoon and 28 g for a dipping-size container. — USDA FNDDS survey food Sweet and sour sauce (code 91361010), WWEIA Mustard and other condiments (n = 1 record) Evidence E source
  Packet 9 g; tablespoon 16 g; dipping container 28 g; quantity not specified 32 g

What your body absorbs

• In four small crossover RCTs, vinegar taken with a starchy meal cut the post-meal blood glucose rise by 20% compared with placebo, but had no effect when the sugar came as simple sugars, pointing to slowed starch digestion. — adults with or without type 2 diabetes, 9-10 per trial, four randomized crossover trials (n = 9-10 per trial) Evidence B source
  Postprandial glucose about 20% lower vs placebo with complex-carbohydrate meals; no effect with monosaccharides or sodium acetate
• In a crossover RCT in 12 healthy adults, adding 18-28 mmol of acetic acid as vinegar to white bread with 50 g carbohydrate lowered early glucose and insulin responses, more so at higher doses. — 12 healthy volunteers, Lund University, Sweden, single test meals (n = 12) Evidence B source
  Inverse dose-response for 30-min glucose and insulin; highest dose lowered glucose at 30 and 45 min; 120-min GI not different

What it does to your health

• In a meta-analysis of 16 trials with 910 adults, daily acetic acid from vinegar-type foods (750-3600 mg for about 8 weeks) lowered fasting glucose by about 36 mg/dL in type 2 diabetes. The sauce itself was not tested. — adults in 16 randomized trials, including people with type 2 diabetes and overweight or obese adults (n = 910) Evidence A source
  Fasting glucose in type 2 diabetes MD -35.73 mg/dL (95% CI -63.79 to -7.67); no change in HbA1c or BMI

What people believe that the data does not support

• In a crossover trial in 16 young adults, vinegar with breakfast reduced appetite alongside higher nausea ratings, and tasting it without swallowing had no effect, so the authors judged its promotion as an appetite suppressant not appropriate. — healthy normal-weight young adults, Study 1 n=16, Study 2 n=14 (n = 16) Evidence B source
  Lower appetite with vinegar alongside higher nausea ratings; no effect of orosensory exposure alone
• The EU did not authorize the claim that apple cider vinegar helps control and normalize body weight, and no vinegar claim in the EU register is authorized. — EU Register on nutrition and health claims, snapshot 2026-09-21 Evidence E source
  Status non-authorized; 0 of 6 vinegar claims authorized

Who this works differently for

• In 16 people with type 2 diabetes, vinegar added to a high-GI meal lowered the 2-hour glucose area from 311 to 181 mmol min/l, but did nothing when added to a low-GI meal. — 16 patients with type 2 diabetes in two matched groups, single test meals (n = 16) Evidence B source
  High-GI meal: glucose iAUC 181 vs 311 mmol min/l (P=0.04); low-GI meal: 229 vs 238 (P=0.56)

What is still unknown

• The UK table lists take-away sweet and sour sauce at 157 calories, 27.5 g total sugars and 150 mg sodium per 3.5 oz (100 g), less than a third of the sodium in the USDA ready-to-serve record. — CoFID food Sauce, sweet and sour, take-away (code 17-336) (n = 1 record) Evidence E source
  Per 100 g: energy 157 calories, carbohydrate 32.8 g, total sugars 27.5 g, sodium 150 mg (USDA 539 mg)

The bottom line

A portion is small. The US survey counts a packet as 9 g, a tablespoon as 16 g and a dipping cup as 28 g. A 28 g dipping cup carries about 150 mg of sodium at the USDA level and about 42 mg at the UK level. Those weights are survey defaults, not measured servings. The single-meal vinegar studies are small and short. In 12 healthy adults in Sweden, 18 to 28 mmol of acetic acid as vinegar with white bread lowered glucose and insulin at 30 minutes, more at the higher doses, and the 120-minute glycemic index did not differ. In a trial of 16 people with type 2 diabetes, the 8 who ate a high-GI meal with vinegar had a 2-hour glucose area of 181 against 311 mmol min/l without it (P=0.04). The 8 given a low-GI meal saw no difference, 229 against 238 (P=0.56). Four crossover trials of 9 to 10 people each found about 20% lower blood glucose after starchy meals with vinegar, and no change when the sugar came as glucose alone. All of this was vinegar, never the sauce. The idea that vinegar curbs appetite was tested in 16 young adults. Appetite did drop, and nausea rose alongside it. Tasting vinegar without swallowing did nothing, and the authors judged that promoting it as an appetite suppressant is not appropriate. The EU has not authorized any of 6 vinegar claims, including one for apple cider vinegar and body weight, which means the evidence fell short at assessment rather than proof of no effect. We have no card on allergy, children, pregnancy or medicines for this sauce, so the page has no safety section. That includes vinegar taken with glucose-lowering medicines and any upper limit for daily acetic acid, so the diabetes results above are not a guide to using vinegar alongside treatment. We also found nothing on how much acetic acid a serving of the sauce actually carries.

Sources

1. sss-r2-01 · food composition dataset
   Sauce, sweet and sour, ready-to-serve, FDC 174066: Sodium 539 MG, Carbohydrate 38.22 G per 100 g
   USDA SR Legacy 2018, Sauce, sweet and sour, ready-to-serve, FDC 174066 · checked 2026-09-30
2. sss-r2-03 · food survey dataset
   Sweet and sour sauce, FNDDS code 91361010, fdc_id 2710296: 1 tablespoon 16 g; 1 packet 9 g; 1 dipping-size container 28 g
   USDA FNDDS 2021-2023, Sweet and sour sauce, fdc_id 2710296 · checked 2026-09-30
3. sss-r2-05 · RCT (crossover)
   Vinegar did not alter PPG when ingested with monosaccharides, suggesting that the antiglycemic action of vinegar is related to the digestion of carbohydrates. ... In these situations, vinegar attenuated PPG by 20% compared to placebo.
   Ann Nutr Metab, 2010 · checked 2026-09-30
4. sss-r2-06 · RCT (crossover)
   Three levels of vinegar (18, 23 and 28 mmol acetic acid) were served with a portion of white wheat bread containing 50 g available carbohydrates as breakfast in randomized order after an overnight fast. ... the higher the acetic acid level, the lower the metabolic responses.
   Eur J Clin Nutr, 2005 · checked 2026-09-30
5. sss-r2-04 · meta-analysis of RCTs
   acetic acid supplementation significantly reduced FBG levels (MD = -35.73 mg/dL [-63.79, -7.67], P = .01) in subjects with type 2 diabetes compared with placebo and low-dose comparators
   J Acad Nutr Diet, 2021 · checked 2026-09-30
6. sss-r2-08 · RCT (crossover)
   In Study 1, ingestion of vinegar significantly reduced quantitative and subjective measures of appetite, which were accompanied by significantly higher nausea ratings, with unpalatable treatment having the greatest effect. ... On this basis the promotion of vinegar as a natural appetite suppressant does not seem appropriate.
   Int J Obes (Lond), 2014 · checked 2026-09-30
7. sss-r2-09 · regulatory decision
   POL-HC-6626 Apple cider vinegar Helps control and normalize body weight. Non-authorised
   EU Register on nutrition and health claims, claim POL-HC-6626, snapshot 2026-09-21 · checked 2026-09-30
8. sss-r2-07 · RCT
   In group A, the incremental area under the curve of glucose (GiAUC(120)) was lower after the addition of vinegar (181+/-78 mmol min/l vs 311+/-124 mmol min/l, P=0.04). ... In group B, the addition of vinegar did not affect either the GiAUC(120) (229+/-38 mmol min/l vs 238+/-25 mmol min/l, P=0.56)
   Eur J Clin Nutr, 2010 · checked 2026-09-30
9. sss-r2-02 · food composition dataset
   Sauce, sweet and sour, take-away, CoFID 17-336: Energy 157 kcal, Carbohydrate 32.8 g, Total sugars 27.5 g, Sodium 150 mg per 100 g
   CoFID 2021, Public Health England, OGL v3.0, Sauce, sweet and sour, take-away, code 17-336 · checked 2026-09-30