Apple cider vinegar benefits: what the science says

Apple cider vinegar (ACV) is probably the most popular home remedy of the last decade — and also one of the most overstated. The short answer: research in adults suggests modest effects on weight and some metabolic markers, especially in people with excess weight, type 2 diabetes or metabolic syndrome; there is no solid evidence that it "detoxifies", "balances the body's pH" or solves skin problems. And almost all studies used liquid vinegar or capsules, not gummies.

In this article you will see what is reasonably documented, what is overstated, what the label of a product with this ingredient says, and when it is worth talking to a healthcare professional before you start.

What does the research actually show about apple cider vinegar?

Systematic reviews with meta-analysis are the best starting point, because they pool several randomised trials. In a meta-analysis of 10 randomised trials with 789 adults (with type 2 diabetes and/or excess weight), taking ACV daily for at least 4 weeks reduced body weight, BMI and waist circumference, but had no significant effect on the other body composition measures assessed ¹.

In another meta-analysis, with 25 clinical trials and 1,320 adults, ACV consumption improved fasting blood glucose, HbA1c and total cholesterol, with no significant changes in BMI, fasting insulin, triglycerides, LDL or HDL; in the subgroup analysis, the most consistent reductions occurred in people with diabetes ². An earlier meta-analysis, with 9 studies, had already found reductions in total cholesterol, fasting blood glucose and HbA1c ³.

In other words: there is a real but modest signal, concentrated in specific populations. It is not a dramatic or universal effect.

How much weight can you expect to lose with apple cider vinegar?

Meta-analyses measure average differences between groups, not individual results. In the meta-analysis of 10 trials in adults with type 2 diabetes and/or excess weight, the effect on weight was small to moderate in statistical terms, with considerable heterogeneity between studies ¹. This means the average improved, but each person's response varied considerably — and no study showed marked weight loss.

It is important to note that these trials assessed ACV as a complement to a usual diet, not as a replacement for diet or exercise. If your goal is weight control, it makes more sense to see ACV as a detail of your routine rather than the main strategy. You can read more about what the evidence says in apple cider vinegar for weight loss: does it work?

Effect on blood sugar: what do the trials say?

This is the area with the most consistent evidence. In a network meta-analysis that compared six plants in people with type 2 diabetes, ACV was the one that reduced fasting blood glucose the most and one of only two with a significant effect on HbA1c ⁴. In the meta-analysis of 25 trials, the reductions in fasting blood glucose, HbA1c and total cholesterol were significant, with clearer effects in the subgroup of people with diabetes ².

This does not turn ACV into a treatment. None of these studies suggests replacing medication, and people with diabetes should talk to their doctor before adding any supplement. If you want to understand the mechanism studied better, see how does apple cider vinegar work for wellbeing.

Apple cider vinegar and cholesterol: what is known

The results on lipids are mixed. The meta-analysis of 9 studies found a reduction in total cholesterol, but no significant effect on triglycerides, LDL or HDL ³. The meta-analysis of 25 trials also found a reduction in total cholesterol, but no significant effect on triglycerides, LDL or HDL across the studies ².

So if you read that ACV "lowers bad cholesterol and raises good cholesterol", that does not match what the meta-analyses consistently show. The documented effect is mainly on total cholesterol, and even that is small.

Skin, eczema and acne: what the evidence shows (and does not show)

Here the evidence is weak and, in part, unfavourable. In a pilot trial with 22 participants (11 with atopic dermatitis and 11 healthy controls), forearm baths with ACV diluted to 0.5% acetic acid for 14 days did not improve skin barrier integrity, and 72.7% of participants reported mild side effects, with improvement after stopping ⁵. A systematic review on nutritional supplements in atopic dermatitis concluded that the available evidence is weak ⁶.

This does not mean that ACV harms everyone's skin, but there is no basis for presenting it as a treatment for acne, eczema or irritation. If you have a skin condition, it should be managed by a dermatologist.

Digestion, bloating and reflux: what the studies examined

Digestive use is probably the most traditional and the least directly studied. A double-blind trial with 24 people with a history of gastro-oesophageal reflux assessed a chewable gum that contained, among other components, liquorice extract, papain and ACV; participants reported less heartburn and less acid reflux after a refluxogenic meal, but the effect cannot be attributed to ACV alone, because the formula had several ingredients ⁷.

There are no trials showing that ACV, on its own, consistently relieves bloating or improves digestion. If your goal is digestive comfort, it is worth reading apple cider vinegar for digestion: is it effective? and does apple cider vinegar help with bloating?.

What about the immune system? What ACV studies measured

There is a randomised crossover trial with 20 healthy young adults (18–45 years) that increased exposure to short-chain fatty acids through the diet — including resistant starch, inulin and ACV — for 21 days; the group with the higher intake had higher faecal concentrations of short-chain fatty acids and changes in immune cells in the blood ⁸. It is a small study, with a mixture of ingredients, and it does not allow the conclusion that ACV, by itself, "boosts immunity".

If your interest is the immune system, vitamin C has an authorised claim in the EU: "Vitamin C contributes to the normal function of the immune system" ⁹. ACV has no authorised health claims — it is a food, not an ingredient with approved claims.

What is not proven: detox, pH and "alkalising"

There are no studies demonstrating that apple cider vinegar "flushes out toxins" or "balances the body's pH". The body regulates blood pH very tightly through the lungs and kidneys; no food changes that balance in a measurable way. These statements have no scientific support and should not be used to decide a purchase.

How to compare what the studies used with what is on the label

Doses in trials vary widely. In the meta-analysis of 10 trials, participants took ACV daily for at least 4 weeks, but the amounts were not uniform across studies ¹. In another trial, in women with polycystic ovary syndrome taking metformin, capsules of 1,500 mg per day were used for 12 weeks ¹⁰ — but that is a specific population, on medication, and the results do not generalise to healthy adults.

A TuttiBear product with this ingredient, Appetite Control Gummies, provides 1,000 mg of apple cider vinegar per 2-gummy serving, in a jar of 60 gummies, 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 directions for use are to chew 2 gummies per day, preferably after a meal, without exceeding the recommended daily dose.

By comparison: the trials used anything from unspecified amounts up to 1,500 mg per day; the gummies provide 1,000 mg per 2-gummy serving. This does not mean they produce the same effects — study doses are not dosing instructions, and there are no trials comparing gummies with liquid vinegar.

Gummies or liquid vinegar: what can be said honestly

There are no studies directly comparing the effectiveness of ACV gummies with liquid vinegar. What is known is that liquid vinegar is acidic and can irritate the oesophagus and tooth enamel if consumed in excess or without dilution; gummies avoid direct contact with acetic acid and are easier to carry. The choice depends mainly on your preference and your tolerance. You can compare the forms in apple cider vinegar vs. gummies: which is the best form?.

Safety and side effects: what to consider

ACV is generally well tolerated in the amounts used in studies, but excessive consumption of liquid vinegar can cause gastric discomfort and tooth enamel erosion. In the trial with diluted ACV baths, most participants reported mild skin irritation ⁵.

If you are pregnant or breastfeeding, if you have a diagnosed health condition or if you take medication regularly, talk to a healthcare professional before you start — the same caution that applies to any new supplement in your routine.

The warnings for the TuttiBear product state: do not exceed the recommended daily dose; food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle; keep out of the reach of young children; contains polyols, excessive consumption of which may have a laxative effect; in case of pregnancy, breastfeeding, illness or taking medication, consult a healthcare professional before consuming.

If you take diabetes medication, diuretics or insulin, talk to your doctor before adding ACV to your routine. For a more detailed analysis, see is apple cider vinegar safe for daily use?.

How to include apple cider vinegar in your routine

If you decide to try it, the simplest way is to choose a fixed time of day and stick to it. TuttiBear gummies are indicated after a meal, which can help to build a habit. If you prefer liquid vinegar, always dilute it in water and avoid prolonged contact with your teeth. For practical ideas, see apple cider vinegar: how to include it in your routine and how much apple cider vinegar should you take per day?.

If you prefer the liquid form, traditional use suggests diluting 1 to 2 tablespoons in a glass of water and drinking it before meals; however, there are no trials showing that this produces the effects seen in the meta-analyses, and pure vinegar should never be drunk undiluted.

Before you buy, it is worth separating evidence from marketing: see apple cider vinegar: myths and truths.

Frequently asked questions

Does apple cider vinegar really help you lose weight?

Meta-analyses show small reductions in weight, BMI and waist circumference in adults with type 2 diabetes and/or excess weight, but the effects vary widely between studies and are not dramatic. It does not replace a balanced diet or physical exercise.

Does apple cider vinegar lower blood sugar?

Several trials and meta-analyses found reductions in fasting blood glucose and HbA1c, especially in people with type 2 diabetes. If you have diabetes or take medication, talk to your doctor before adding any supplement.

Does apple cider vinegar detox the body or balance pH?

There are no studies supporting these statements. The body regulates blood pH very tightly through the lungs and kidneys, and no food changes that balance in a measurable way.

Are apple cider vinegar gummies as effective as liquid vinegar?

There are no studies directly comparing the two forms. Gummies avoid direct contact of acetic acid with the oesophagus and teeth and are more practical, but there is no evidence of equivalence or superiority.

How much apple cider vinegar should I take per day?

The doses used in studies vary and are not dosing instructions. A TuttiBear product with this ingredient provides 1,000 mg per 2-gummy serving, with directions to chew 2 gummies per day after a meal, without exceeding the recommended daily dose.

Can apple cider vinegar irritate the skin?

In a trial with ACV baths diluted to 0.5% for 14 days, most participants reported mild skin side effects, with improvement after stopping. There is no evidence that it improves the skin barrier.