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Apple cider vinegar

What apple cider vinegar has been studied for

3 associations assessed — 2 with at least some human evidence behind them. Strongest first.

  • 1 Moderate
  • 1 Limited
  • 1 Insufficient
3 things to know first — allergies, interactions and intake limits

About apple cider vinegar

Apple juice fermented twice — yeast turns the sugar into alcohol, then acetobacter turns the alcohol into acetic acid. Unfiltered versions contain the cloudy bacterial mass sold as the "mother". A tablespoon is the usual reference amount.

Apple cider vinegar is the most oversold item in this file, and the gap between what has been measured and what is claimed is wide. The measured part is narrow and real: acetic acid taken with a starchy meal blunts the glucose rise afterwards. Almost everything else attached to it — fat loss, skin, digestion, energy — rests on tiny trials, animal work or nothing at all, and the acid itself is capable of doing damage to teeth and the oesophagus if used carelessly.

Also known as apple cider vinegar, cider vinegar, ACV

Blood Sugar & Metabolic HealthWeight ManagementHeart Health

The evidence in depth

Best supported: Moderate

What each association actually rests on, and the papers behind it. A rating describes the state of the research, not how impressive the food is. How we rate evidence.

Blood glucose response

Blood Sugar & Metabolic Health
Moderate evidence

Meta-analyses of small randomised trials report lower post-meal glucose and modest reductions in fasting glucose and HbA1c when vinegar is taken with meals. The trials are small, short and often poorly blinded — vinegar is hard to disguise — and the amounts used are one to two tablespoons daily, so the effect is real but small and easily overstated.

What may be going on: Acetic acid appears to slow gastric emptying and to inhibit disaccharidase activity, spreading carbohydrate absorption over a longer period.

Moderate evidence. Several human studies point the same way, with real caveats.

3 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Body composition

Weight Management
Limited evidence

A few small trials report modest weight differences with daily vinegar, typically a kilogram or two over twelve weeks and usually alongside a calorie-restricted diet. The studies are small, several have attracted methodological criticism, and the results are not consistent enough to build anything on.

Limited evidence. Early human work, or mostly lab and animal research.

4 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Blood lipid profile

Heart Health
Insufficient evidence

Lipid changes are reported as secondary outcomes in some vinegar trials and absent in others. Nothing in that pattern supports a conclusion about cholesterol or triglycerides.

Insufficient evidence. Not enough human research to say anything useful yet.

4 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Ask about Apple cider vinegar

Ask about Apple cider vinegar

Answers are written only from the entries on this page — the same nutrients, compounds, claims and citations you can read above. Nothing is added from outside the database, and every answer lists what it was built from.

AI explanations are not switched on for this site, so there is nothing to ask here. Everything above is read straight from the database and does not need them.

Key nutrients

Nutrient content per 100 grams
NutrientAmount% DV
Macronutrients
Calories21 kcal1%
Protein0 g0%
Total fat0 g0%
Carbohydrate0.93 g0%
Fibre0 g0%
Total sugars0.4 g—
Water93.8 g—
Fats
Saturated fat0 g0%
Monounsaturated fat0 g—
Polyunsaturated fat0 g—
Cholesterol0 mg0%
EPA (omega-3)0 g—
DHA (omega-3)0 g—
DPA (omega-3)0 g—
Linoleic acid (omega-6)0 g—
Vitamins
Vitamin A0 µg0%
Vitamin C0 mg0%
Vitamin D0 µg0%
Vitamin E0 mg0%
Vitamin K0 µg0%
Thiamin (B1)0 mg0%
Riboflavin (B2)0 mg0%
Niacin (B3)0 mg0%
Pantothenic acid (B5)0 mg0%
Vitamin B60 mg0%
Folate0 µg0%
Vitamin B120 µg0%
Choline0 mg0%
Minerals
Calcium7 mg1%
Iron0.2 mg1%
Magnesium5 mg1%
Phosphorus8 mg1%
Potassium73 mg2%
Sodium5 mg0%
Zinc0.04 mg0%
Copper0.0080 mg1%
Manganese0.249 mg11%
Selenium0.1 µg0%
Other measured compounds
Beta-carotene0 µg—
Alpha-carotene0 µg—
Lycopene0 µg—
Lutein + zeaxanthin0 µg—
Caffeine0 mg—
Ash0.17 g—

Nutrient values are per 100 g of the USDA reference entry named on this page and vary with variety, growing conditions, storage and preparation.

Source record: Vinegar, cider (USDA FoodData Central, FDC ID 173469).

% DV uses the FDA Daily Values for adults and children aged 4 and over. A dash means no Daily Value has been established for that nutrient.

Bioactive compounds

Compounds present in meaningful amounts. Presence is banded rather than quantified, because whole-food levels vary enormously with variety, growing conditions, storage and preparation.

How preparation changes things

Only effects with real support are listed. If a preparation method is missing, it is because nothing dependable is documented — not because it makes no difference.

  • with foodChanges postprandial glucose response

    The glucose effect only appears when vinegar is taken with or just before a carbohydrate-containing meal. Taken on an empty stomach at other times of day it does nothing for the meal that comes later.

Things to know

Allergies, interactions and intake concerns. Every food gets this section — a reference where everything is uniformly good is not a reference.

  • Too much

    Erodes tooth enamel

    Vinegar is acidic enough to dissolve dental enamel, and the damage is permanent. Sipping it neat or drinking it daily undiluted is the risky pattern; diluting well, drinking through a straw, rinsing with water afterwards and not brushing immediately all reduce it.

  • Too much

    Oesophageal and gastric injury from undiluted vinegar and tablets

    Case reports describe chemical burns to the throat and oesophagus from swallowing vinegar neat, and from cider vinegar tablets lodging on the way down. Anything containing acetic acid should be well diluted and taken with water.

  • Interaction

    Delayed gastric emptying, insulin and diuretics

    Vinegar slows stomach emptying, which is unhelpful in gastroparesis and can make insulin timing unpredictable in type 1 diabetes. A case of low blood potassium and bone loss has been reported with very large chronic intake, which matters alongside diuretics or digoxin.