Vinegar, acetate and health: what the research shows
What it found
Vinegar and the acetate it provides have been linked to changes in fat burning, blood sugar and brain energy in people, animals and lab tests.
Most human trials were small and short, so the picture is not settled.
What they found
Studies in people
Acetate in the body
Acetate comes from three places: what we eat, gut bacteria breaking down fibre, and the body making it in tissues. In healthy adults, a single dose of sodium acetate made blood acetate nearly double at 15 minutes, peak at 45 minutes and return to fasting levels within two hours.
Fat burning in people
In small randomised trials, acetate infusions into the colon of overweight men increased fat burning by 25% compared to no change in the placebo group. A 12-week trial in 155 overweight adults found that vinegar providing 750 or 1500 mg acetic acid daily reduced visceral and subcutaneous fat and total body weight compared to controls.
Blood sugar in people
In adults with type 2 diabetes, taking 1.8 g acetic acid as vinegar with a meal increased glucose uptake by forearm muscles by 32% over five hours compared to control. A meta-analysis of 25 studies with 1320 participants found vinegar lowered haemoglobin A1c, a measure of average blood sugar over three months, with the largest reductions in obese or diabetic patients.
Brain and mood in people
Two small pilot trials in healthy adults found that daily liquid vinegar improved depression scores over four weeks compared to vinegar pills. In older stroke patients, higher blood acetate was linked to markers of recovery, but this was only a correlation.
Animal and lab studies
Fat burning in animals
In high-fat-fed mice, acetic acid given for 6 weeks reduced body weight gain by 26% and fat mass gain by 23% compared to controls. In rabbits, acetate injection increased genes involved in fat burning in muscle and fat tissue and reduced liver and muscle fat.
Brain effects in animals
In rats, a single large oral dose of acetate raised a brain energy reserve called phosphocreatine at 4 hours, though brain ATP was unchanged. In a mouse model of Alzheimer's, a high-fibre diet that raised colonic acetate nearly prevented the rise in amyloid-beta precursor protein in brain tissue.
What the authors conclude
“Emerging clinical research in patient populations and healthy adults is suggestive of health benefits associated with vinegar ingestion; however, this literature is sparce, and the published reports were mainly conducted in the USA and Iran and displayed a high degree of heterogeneity in study quality, vinegar preparations and protocols, outcome measurements, and statistical variation.”
Also in their conclusions
- They say that acetate plays a prominent role in cellular metabolism by promoting tissue energetics and healthy brain function and stabilising blood glucose concentrations.
- They state that emerging clinical research is suggestive of health benefits from vinegar ingestion, but that this literature is sparse and the reports varied widely in quality and methods.
- They call for well-designed investigations with large sample sizes and long duration to verify these initial reports and identify the specific metabolic processes linking acetic acid to health outcomes.
How it was done
The authors wanted to pull together what is known about acetate metabolism and how vinegar, as a dietary source of acetic acid, might affect health. They note this is a broad and largely unexplored topic.
The author searched the biomedical literature for studies on acetate, acetic acid and vinegar, focusing on metabolic and health outcomes. Preference was given to high-quality experiments and randomised controlled trials, which can show cause and effect.
What it can’t tell you
- Many of the studies were in animals or cells, so they cannot show what happens in people.
- The human trials were mostly small, short and varied in how vinegar was given, so their results may not apply broadly.
- Some findings come from studies that only show a link, not cause and effect.
Who paid
- Conflicts
- The author declares no conflicts of interest.
- Authors work at
- Arizona State University, USA
The paper
- Title
- The Case for Vinegar Ingestion
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Licence
- CC BY. Words in quotation marks are the authors’; the rest is our summary.
- Cite
- Johnston CS (2026). The Case for Vinegar Ingestion. Nutrients. doi:10.3390/nu18152574Free full textPubMed 42588197DOI
Summary written 26 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error