Apple Cider Vinegar: Myths and Truths

Apple cider vinegar is neither a miracle cure nor a useless product: the available evidence is modest and focuses mainly on metabolic parameters, not on "detox" or rapid weight loss. The most recent meta-analyses found small but statistically significant reductions in weight, BMI and waist circumference in adults with type 2 diabetes and/or excess weight who consumed apple cider vinegar for at least 4 weeks ¹, and improvements in some glycaemic and lipid parameters in adults ².

In other words: there are real signals, but they are small, with high heterogeneity between studies and specific populations. This article separates what is reasonably supported from what is merely a social media promise — and explains what that means for anyone thinking of including apple cider vinegar in their routine, as a liquid or as gummies.

What does the evidence actually show about apple cider vinegar?

The active compound is acetic acid, formed during fermentation. It is what gives the sour taste and it is what has been studied. The most consistent data come from meta-analyses of randomised clinical trials in adults.

In a meta-analysis of 10 randomised trials with 789 adult participants with type 2 diabetes and/or excess weight, daily consumption of apple cider vinegar for at least 4 weeks significantly reduced body weight, BMI and waist circumference; no significant effects were observed on the remaining body composition parameters analysed ¹.

In another meta-analysis, of 9 studies with 10 study arms, consumption of apple cider vinegar reduced total cholesterol, fasting plasma glucose and HbA1c in adults; there was no significant effect on triglycerides, LDL-C or HDL-C ². A broader meta-analysis, with 25 clinical trials and 1320 adults, found significant reductions in fasting glucose, HbA1c and total cholesterol, but not in BMI, serum insulin, HOMA-IR, triglycerides, LDL-C or HDL-C; in the subgroup analysis, the effects on fasting glucose and HbA1c were more evident in people with diabetes ³.

A network meta-analysis that compared six plants in people with type 2 diabetes concluded that apple cider vinegar was the intervention with the greatest effect on reducing fasting glucose and one of the two with a significant effect on HbA1c ⁴. This does not mean it is "the best remedy": it means that, within the available studies, it was the one that showed the most consistent effects on these parameters.

Does apple cider vinegar help with weight loss?

It helps a little, and indirectly. The 2025 meta-analysis found significant reductions in weight, BMI and waist circumference, but with effects classified as modest and with high heterogeneity between studies (I² between 61% and 83%) ¹. This means that results vary greatly from study to study and that the average hides important differences.

In addition, the same meta-analysis found no significant effects on other body composition parameters ¹, and the meta-analysis of 25 trials found no significant effect on BMI ³. In other words: there is no basis for promising relevant weight loss. Any effect is small and does not replace a balanced diet and physical activity.

If your goal is weight control, it is more worthwhile to understand how apple cider vinegar fits into a dietary routine than to expect isolated results — see apple cider vinegar for weight loss: does it work? and how to include it in your routine.

And blood sugar? What the trials say

This is where the evidence is most consistent, although still with limitations. The meta-analyses found reductions in fasting glucose and HbA1c in adults ^{2 3}, with more evident effects in people with diabetes in the subgroup analysis ³.

A randomised trial in 94 women with polycystic ovary syndrome, insulin resistance and metabolic syndrome, all taking metformin (1500 mg/day), tested 1500 mg/day of apple cider vinegar in capsules for 12 weeks: resolution of metabolic syndrome was significantly more frequent in the vinegar group (74.5%) than in the placebo group (40.4%), with reductions in insulin resistance ⁵. This is a clear example that results cannot be generalised: these are women with a specific condition, on medication, and the vinegar was used as an adjuvant — never as a substitute for medication.

If you have prediabetes or diabetes, speak to your doctor before including apple cider vinegar regularly. No data suggest that it replaces treatment.

Digestion, bloating and "detox": what is a myth

The most persistent myth is that apple cider vinegar "flushes out toxins" or "cleanses the liver". There is no evidence to support these claims, and the body has its own elimination mechanisms, ensured mainly by the liver and kidneys. No food speeds up that process miraculously.

As for digestion and bloating, the evidence is scarce. A randomised crossover trial in 20 healthy adults aged 18 to 45 tested a diet rich in short-chain fatty acids — provided through resistant starch, inulin and apple cider vinegar — for 21 days, with a 21-day interval: the rich diet increased faecal concentrations of short-chain fatty acids and reduced faecal ammonia ⁶. This shows that apple cider vinegar can be part of an intervention that alters colonic fermentation, but the study combined three sources of short-chain fatty acids — it does not allow the effect to be attributed to vinegar alone, nor did it measure digestive symptoms. For a more focused analysis, see apple cider vinegar for digestion: is it effective?.

Some people also use apple cider vinegar topically, diluted, for skin problems. In a randomised trial in 11 people with atopic dermatitis and 11 healthy controls, forearm baths in diluted vinegar (0.5% acetic acid) for 10 minutes a day, for 14 days, did not alter the skin's bacterial microbiome ⁷. It is a small study in a specific condition, but it does not support the idea that vinegar "rebalances" the skin.

Common myths, one by one

• "It burns fat": there is no evidence that it increases fat burning. The effects on weight are small and probably indirect ¹.
• "It flushes out toxins" or "cleanses the liver": without any scientific support. The body has its own elimination mechanisms.
• "It cures diabetes": false and dangerous. Studies show modest effects on glycaemic parameters, always as a complement and never as a substitute for medication ^{2 3}.
• "It makes you lose several kilos in a week": no trials show this. The meta-analyses describe small average reductions over weeks ¹.
• "Drinking it neat is safe because it is natural": concentrated acetic acid can irritate the oesophagus and tooth enamel. Diluting is essential.
• "It prevents kidney stones": in a randomised crossover trial with 20 participants with no history of kidney stones, apple cider vinegar did not significantly alter 24-hour urinary parameters, unlike coconut water and lemon water, which increased urinary citrate ⁸. This study did not assess the prevention of kidney stones, so it allows no conclusion about that effect.

What the TuttiBear gummies label says

TuttiBear's Appetite Control Gummies provide, per serving of 2 gummies, 1000 mg of apple cider vinegar, plus vitamin B6 (1 mg; 71% NRV), folic acid (400 µg; 200% NRV), vitamin B12 (2.4 µg; 96% NRV), iodine (100 µg; 67% NRV), pomegranate juice powder (80 mg) and beetroot juice powder (80 mg). The jar contains 60 gummies and the stated directions are to chew 2 gummies per day, preferably after a meal, without exceeding the recommended daily dose.

For context: the trials that found metabolic effects used varied daily doses, often in the order of 1500 mg or more, and for weeks ^{5 1}. The dose per serving of the gummies is 1000 mg — that is, lower than some of the doses studied. This is not a dosing instruction: doses used in studies are not recommendations, and the product's directions are those stated on the label.

The gummies contain polyols (maltitol), and the label itself warns that excessive consumption may have laxative effects. They also contain B-complex vitamins and iodine, whose authorised EU claims refer to normal energy-yielding metabolism and normal thyroid function ⁹. There are no authorised EU health claims for apple cider vinegar as a botanical ingredient ⁹ — so everything stated about it must come from studies, not from label claims.

Gummies or liquid vinegar: what changes?

There are no studies directly comparing gummies with liquid vinegar, so it is not possible to state that one form is absorbed better than the other. What can be said with confidence is what differs in practice:

Aspect	Liquid vinegar	Gummies
Dose	Variable, measured by spoon	Fixed per serving (label)
Contact with tooth enamel	Yes, if undiluted and without a straw	Chewing, no acidic drink
Taste	Sour and intense	More pleasant
Sweeteners/sugars	Usually none	May contain polyols or sugars
Direct evidence of efficacy	Studies used mainly liquid or capsules	No comparative studies

If the choice is between giving up because of the taste or keeping up a routine with a fixed dose, gummies may be the more realistic option — but they remain a supplement, not a treatment. To go further, see apple cider vinegar vs. gummies and what are the ingredients in TuttiBear gummies.

Who should be careful

Acetic acid can irritate mucous membranes. People with gastritis, peptic ulcer, gastro-oesophageal reflux or a sensitive oesophagus may feel symptoms worsen with liquid vinegar. In pregnancy, breastfeeding, children, diagnosed disease or taking medication — including diuretics and antidiabetics — speak to a healthcare professional before consuming apple cider vinegar regularly. Never give apple cider vinegar to children without professional advice.

If you use liquid vinegar, always dilute it in water, use a straw and rinse your mouth afterwards. Never drink vinegar neat.

If you take diuretic or diabetes medication, vinegar may interact and cause hypoglycaemia or potassium imbalances; speak to your doctor before including it regularly.

How to use it sensibly

Start slowly, observe how your body reacts and do not increase the dose on your own. If you choose gummies, follow the label directions and respect the warnings, including not exceeding the recommended daily dose and consulting a healthcare professional in case of pregnancy, breastfeeding, illness or taking medication. If you have a metabolic condition, discuss including it with your doctor — and keep your prescribed treatment.

If you decide to use liquid vinegar, the reference most cited in studies is one to two tablespoons (15 to 30 ml) diluted in a large glass of water, once a day, before main meals — especially if the meal is rich in carbohydrates. More is not better: high doses can cause nausea, vomiting and oesophageal damage. Never drink vinegar neat.

The science on apple cider vinegar continues to evolve: the effects described are modest, the populations studied are specific and the heterogeneity between studies is high ^{1 3}. Realistic expectations are the best starting point. To learn more about the ingredient itself, see the apple cider vinegar page.

Frequently asked questions

Does apple cider vinegar help you lose weight?

Meta-analyses found small reductions in weight, BMI and waist circumference in adults with type 2 diabetes and/or excess weight, but with high variability between studies and no effects on other body composition parameters. There is no basis for promising relevant weight loss. Any effect is modest and does not replace a balanced diet and physical activity.

Does apple cider vinegar help control blood sugar?

Several meta-analyses of randomised clinical trials describe reductions in fasting glucose and HbA1c in adults, with more evident effects in people with diabetes. Even so, these are modest effects and studies with limitations. If you have diabetes or prediabetes, speak to your doctor and never replace your medication.

Does apple cider vinegar flush out toxins or cleanse the liver?

No. There is no scientific evidence to support the idea that apple cider vinegar flushes out toxins or cleanses the liver. The body has its own elimination mechanisms, ensured mainly by the liver and kidneys, and no food speeds up that process miraculously.

What is the dose of apple cider vinegar in TuttiBear gummies?

The Appetite Control Gummies provide 1000 mg of apple cider vinegar per serving of 2 gummies, in a jar of 60 gummies. The stated directions are to chew 2 gummies per day, preferably after a meal, without exceeding the recommended daily dose. Doses used in studies are not dosing instructions.

Is drinking apple cider vinegar neat safe?

It is not advisable. Concentrated acetic acid can irritate the oesophagus and damage tooth enamel. If you use liquid vinegar, always dilute it in water, use a straw and rinse your mouth afterwards. People with gastritis, reflux or an ulcer should take special care and speak to a healthcare professional.

Who should avoid apple cider vinegar?

People with gastritis, peptic ulcer, gastro-oesophageal reflux or a sensitive oesophagus may feel symptoms worsen. In pregnancy, breastfeeding, children, diagnosed disease or taking medication, including diuretics and antidiabetics, you should consult a healthcare professional before consuming it regularly.