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The apple cider vinegar benefits with the most research behind them are modest. In small studies, vinegar taken with a starchy meal lowered the rise in blood sugar and insulin afterward. Evidence on weight is weaker than headlines suggest, and a widely reported 2024 trial in Lebanese teenagers and young adults was retracted in September 2025 because its results were unreliable. Vinegar is also an acid, which matters for teeth, the throat and people who take certain medicines.
Peptide Labs sells apple cider vinegar capsules, and we mention two below. This article is general information, not medical advice.
Key Takeaways
- The most-studied effect is a smaller blood sugar rise after a starchy meal, mostly in small, short studies.
- Weight studies are few and short, and a much-cited 2024 trial was retracted in 2025.
- Undiluted vinegar can erode tooth enamel and irritate the throat; tablets have caused esophageal injury.
- People on insulin, diabetes drugs, diuretics or digoxin should ask a pharmacist first.
- Capsules avoid contact with teeth but vary widely in how much acetic acid they contain.
What is apple cider vinegar?
Apple cider vinegar (ACV) is made in two fermentation steps: yeast turns apple sugars into alcohol, then bacteria turn the alcohol into acetic acid. Acetic acid gives vinegar its sour taste and is the compound most studies focus on. FDA guidance says vinegar sold in the United States should contain at least 4 grams of acetic acid per 100 milliliters. Unfiltered vinegar may contain cloudy strands called “the mother”; its presence is a labeling feature, not a proven health factor.
Apple cider vinegar benefits: what the research shows
Most human research on vinegar is small, short and measures markers such as blood sugar rather than long-term health. Here is how the main claims compare.
| Claimed benefit | What studies found | Strength of evidence |
|---|---|---|
| Lower blood sugar after meals | Smaller glucose and insulin rises when vinegar was taken with a meal | Moderate for this short-term marker; small studies |
| Weight loss | Modest differences in a few 12-week trials | Limited; one key trial retracted |
| Feeling full | Higher fullness ratings in a 12-person study | Very limited |
| Blood fats | Lower triglycerides in one industry-run trial | Limited |
| Detox, skin or blood pressure claims | No reliable human evidence | Not supported |
Blood sugar after meals
A 2017 meta-analysis in Diabetes Research and Clinical Practice pooled controlled trials of vinegar taken with a meal and found lower blood glucose and insulin responses afterward compared with control meals, although the individual trials had conflicting results. In a 2005 Swedish study of 12 healthy adults, higher amounts of acetic acid served with white bread gave lower blood sugar and insulin rises. WebMD’s review notes that these changes are not likely to be meaningful for most people who have diabetes, and vinegar is no substitute for prescribed diabetes care.
Weight
The most cited weight trial was run in Japan and published in 2009 by researchers from Mizkan, a vinegar maker. Obese adults drank a beverage with 15 or 30 milliliters of vinegar or a placebo daily for 12 weeks, and body weight, waist size, visceral fat and triglycerides were lower in the vinegar groups than the placebo group. The differences were modest and the study was industry-run.
A 2024 trial of 120 Lebanese adolescents and young adults reported much larger weight losses and drew worldwide coverage. BMJ Group retracted it in September 2025 over its statistical analysis, implausible values, the reliability of the raw data, inadequate reporting of methods and the lack of prospective trial registration, and said its results should no longer be used. A 2025 meta-analysis in Nutrients that pooled 10 trials (789 people) and reported lower weight and BMI included that retracted trial, and the authors also noted high variability between studies, short durations and signs of publication bias. Its pooled result should be read with that in mind.
Appetite and fullness
In the Swedish bread study, people rated themselves fuller as the acetic acid level rose. A 2007 study in 10 people with type 1 diabetes and gastroparesis found vinegar slowed stomach emptying further, which may be one reason for a fuller feeling but can be a problem for people whose stomach already empties slowly. For a broader look at products sold for fullness, see our guide to appetite suppressants.
Other claims
Claims that ACV cleanses the body, clears skin, alkalizes the blood or controls blood pressure are not supported by reliable human trials. A UChicago Medicine gastroenterologist has specifically said ACV will not control high blood pressure.
Side effects and safety
- Tooth enamel. Laboratory studies show vinegar can dissolve minerals from enamel. UChicago Medicine suggests drinking water afterward.
- Throat and esophagus. WebMD warns that drinking undiluted vinegar regularly can damage the teeth or throat, and a 2005 report described esophageal injury in a person using ACV tablets.
- Low potassium. A 1998 case report described low potassium and thinning bones in a woman who drank about 250 milliliters of cider vinegar a day for six years.
- Slower stomach emptying. This may matter for people with gastroparesis, especially those with type 1 diabetes.
- Reflux and kidney disease. UChicago Medicine notes acidic foods may worsen reflux for some people, and people with chronic kidney disease may not handle the extra acid well.
- Pregnancy. Whether ACV products affect pregnancy is not known.
Drug interactions: insulin, diuretics and digoxin
Research on ACV and medicines is incomplete, but medically reviewed guides flag three groups. Insulin and drugs that raise insulin may combine with vinegar to lower blood sugar or potassium too far. Digoxin, a heart medicine, becomes riskier when potassium is low. Some diuretics (water pills) also lower potassium, so adding large amounts of vinegar could push levels down further. If you take any of these, ask your pharmacist or prescriber before using ACV in any form.
Liquid vs capsules vs gummies
Format changes how much acetic acid you get and what comes with it. Our comparison of apple cider vinegar capsules vs gummies covers the details.
| Liquid ACV | Capsules | Gummies | |
|---|---|---|---|
| What it contains | Vinegar with at least 4% acetic acid | Dried ACV powder, sometimes with added acid salts | Dried ACV powder in a sweetened gummy base |
| Contact with teeth | Yes, unless diluted and rinsed | Minimal when swallowed whole | Some, while chewing |
| Added sugar | None in plain vinegar | Usually none | Often added sugar or sweeteners |
| Label accuracy | Standardized acidity | Varies by brand; check acetic acid | Varies by brand |
Capsule labels differ a lot. Bragg Apple Cider Vinegar Capsules list 750 mg of acetic acid per three-capsule serving, plus vitamin D3 and zinc, while Horbaach Apple Cider Vinegar Capsules list apple cider vinegar powder by weight without an acetic acid figure and use a gelatin shell. Both labels warn that the product contains a high concentration of acetic acid and may cause irritation. A 2005 analysis of eight ACV tablet brands found wide differences in acid content and label accuracy, including one that claimed 35% acetic acid and contained 3.2%. More Bragg products are on our Bragg brand page.
Frequently Asked Questions
What are the proven benefits of apple cider vinegar?
The most consistent finding is a smaller rise in blood sugar and insulin after a starchy meal, seen in small, short studies. Other claims have limited or no reliable evidence.
Does apple cider vinegar help you lose weight?
Evidence is limited. A few short trials found modest differences, one was industry-run, and a widely reported 2024 trial was retracted in 2025 because its results were unreliable.
Is it safe to drink apple cider vinegar every day?
Regularly drinking undiluted vinegar can damage teeth and the throat, and very large amounts over years have been linked to low potassium. Ask a healthcare provider, especially if you take medicines.
Can apple cider vinegar interact with medications?
Yes, possibly. Guides flag insulin and other diabetes drugs, digoxin and some diuretics, mainly because of effects on blood sugar and potassium. Ask your pharmacist.
Are ACV capsules as effective as liquid vinegar?
They have not been compared well. Most studies used liquid vinegar, and capsules vary in how much acetic acid they contain, so compare the acetic acid amount on each label.
Who should not take apple cider vinegar?
People with low potassium, gastroparesis, chronic kidney disease, reflux or swallowing problems, and people who are pregnant or taking the medicines above, should ask a doctor first.
Questions about a label? Contact us or browse our appetite control category. Follow the label and ask a healthcare provider before starting any supplement. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Last reviewed September 2026.
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