Apple cider vinegar gummies, reviewed by the numbers:
what is left of the studies after the September 2025 retraction
The label of an apple cider vinegar gummy shows a number of milligrams. That number tells you next to nothing, because the dose that matters is not the amount of vinegar but the amount of acetic acid in it, and that is almost never stated. Below is the arithmetic, with the studies set side by side, including the one that was retracted last year.
What “400 mg apple cider vinegar” means:
less than you think, and not out of bad intent
Take any jar of apple cider vinegar gummies on the Romanian market and look at the figure on the back. You will find milligrams of apple cider vinegar per serving. Sometimes 400, sometimes 500, sometimes 1,000. The number is real, in the sense that the manufacturer really did put that much in. The problem is a different one: there is nothing you can do with it.
Vinegar is not a substance, it is a solution. What has ever been measured in studies is not the vinegar but the acetic acid in it. And the ratio between the two depends entirely on what the manufacturer put into the gummy: liquid vinegar dried onto a maltodextrin carrier, concentrated vinegar, or acidified apple powder. Between these options there can be a factor of twenty.
Milligrams of vinegar are not a dose. The dose is the acetic acid. If the label does not declare it, the product cannot be compared with any study, for better or for worse.
To give you an anchor: the 2009 Japanese study, which you can read about below, states in black and white that 15 millilitres of vinegar contain 750 milligrams of acetic acid. In other words, table vinegar is about 5% acetic acid. With this conversion in mind you can check for yourself, in ten seconds, any label that tells you how much vinegar went in and does not tell you how much acid is left.
The arithmetic nobody does:
from millimoles to how many gummies it would take
Let us do it just once, with figures you can check. I will take our own product, because I know its composition and because it is more honest that way: one serving is two gummies and declares 400 milligrams of apple cider vinegar. If those 400 milligrams behave like liquid vinegar, that is 5% acetic acid, you get 20 milligrams of acetic acid per serving.
| What you are comparing | Acetic acid per day | How many servings of gummies it would take |
|---|---|---|
| One 2-gummy serving, 400 mg vinegar at 5% acid | 20 mg | 1 |
| Lowest dose in the blood glucose study, 18 mmol | 1,081 mg | 54 servings, that is 108 gummies |
| Low dose in the 12-week study, 15 mL vinegar | 750 mg | 37.5 servings, that is 75 gummies |
| High dose in the same study, 30 mL vinegar | 1,500 mg | 75 servings, that is 150 gummies |
The right-hand column is the one that matters. To reach the lowest dose at which an effect on blood glucose has ever been seen, you would need 108 gummies in a day. A jar holds 60. You would need almost two jars a day.
Now the honest part, the one missing from the articles that dismiss the category as carelessly as others praise it. The calculation above assumes 5% acetic acid. If a manufacturer uses a concentrate, the percentage is higher. In the absurd case where all 400 milligrams were pure acetic acid, you would reach the lowest dose in the blood glucose study with 2.7 servings a day, and the low dose in the 12-week study with 1.9 servings.
Between the two scenarios there is a factor of twenty: somewhere between “two servings” and “fifty servings”. And the label does not tell you which one you are in. This is not a marketing problem, it is a problem of missing information.
Östman and colleagues, European Journal of Clinical Nutrition, 2005. Twelve healthy volunteers were given white bread containing 50 grams of available carbohydrate, together with three levels of vinegar: 18, 23 and 28 millimoles of acetic acid. In milligrams, that means 1,081, 1,381 and 1,682. The response was dose-dependent at 30 minutes, for both glucose and insulin, and the feeling of fullness increased with the acetic acid.
What it does not say: anything about gummies, anything about months, anything about weight. Twelve people, a single meal.
Kondo and colleagues, Bioscience, Biotechnology, and Biochemistry, 2009. Twelve weeks, double-blind, in Japanese adults with obesity. Each one drank 500 millilitres a day of a drink containing either 15 millilitres of vinegar, that is 750 milligrams of acetic acid, or 30 millilitres, that is 1,500 milligrams, or none.
This study is also useful for a secondary reason: it gives you the conversion. Fifteen millilitres of vinegar means 750 milligrams of acetic acid, so vinegar is about 5% acid. With this number you can check any label yourself.
Abou-Khalil, Andary and El-Hayek, BMJ Nutrition, Prevention & Health, March 2024. One hundred and twenty adolescents and young adults in Lebanon, 5, 10 or 15 millilitres of apple cider vinegar a day, for twelve weeks. It is the study that made headlines around the world and that, to a large extent, sold the shelf of vinegar gummies.
It was retracted on 23 September 2025. Chapter 3 sets out exactly what the retraction notice says.
The study that sold the shelf:
retracted on 23 September 2025, with the authors' agreement
In March 2024, the journal BMJ Nutrition, Prevention & Health published a randomised, double-blind, placebo-controlled study in 120 adolescents and young adults in Lebanon. Three doses of apple cider vinegar, 5, 10 or 15 millilitres a day, for twelve weeks. The reported results were large and went round the international press within days. A good part of what you read in Romanian today about apple cider vinegar rests, directly or indirectly, on that study.
On 23 September 2025, the journal retracted it. The retraction notice is public and short. It is worth reading in the original, but here is what it says, point by point.
The way the statistical analysis was done. Implausible values. Doubts about the reliability of the dataset. Inadequate reporting of the work. And the lack of prospective registration of the trial, which breaches BMJ policy.
The authors' analyses could not be reproduced and multiple errors were identified. The dataset supplied by the authors themselves showed patterns inconsistent with random allocation of participants to treatment groups, plus implausibly small p values for the limited number of participants.
The authors say the discrepancies were honest mistakes, arising from different versions of the files and from rounding when exporting from the statistics software. They agree with the retraction. Their institutions have been informed.
The part that matters for you is what happens to the figures from here. In September 2025 a meta-analysis was also published that brings together ten randomised studies, 789 participants, and reports a small effect on weight, with a standardised mean difference of minus 0.39 and a confidence interval from minus 0.63 to minus 0.15. Heterogeneity is high, 62% for weight and 83% for body mass index, meaning the studies do not agree with one another. And the retracted Lebanese study is included, at reference 44, cited as reporting significant reductions.
The meta-analysis was published almost the same week as the retraction, so it could not have taken it into account. It is nobody's bad faith. But it does mean that the most recent synthesis of the evidence, the one you will see cited from now on, contains a retracted study.
What the European list says:
we searched it word by word, and nothing comes up
In the European Union, a health claim is not a matter of opinion or of how many studies you can find. It is a list. The Annex to Regulation (EU) No 432/2012 contains the permitted claims, each with its wording and the conditions under which it may be used. What is not on the list is not written, however politely you phrase it.
We downloaded the whole annex and searched it. The plain text runs to 100,612 characters. The results are short.
| Word searched for in the annex | Number of times it appears |
|---|---|
| vinegar (oțet) | 0 |
| acetic acid (acid acetic) | 0 |
| apple (măr) | 0 |
| cider (cidru) | 0 |
| kombucha | 0 |
Zero, five times over. It is not an interpretation, it is a search of a public document. The consequence is simple: nobody is allowed to write, on a box of apple cider vinegar gummies or in an advert for them, that the product does something for blood glucose, digestion, weight or the liver. Not even with soft verbs such as “supports” or “balances”.
What can legally be written comes down to three things, and only these: what the product contains, how it was made, and the authorised claims for the nutrients it contains in a significant amount. If a gummy also contains vitamin C in an amount that passes the threshold, the authorised vitamin C claim may appear. But that is about vitamin C, not about vinegar. We have written at length about how to read this kind of packaging in the guide to the six criteria on the box.
Five things people say about vinegar gummies:
and how well each one holds up to checking
A tablespoon of vinegar is 15 millilitres, about 15 grams, of which around 750 milligrams is acetic acid. A two-gummy serving declares 400 milligrams of apple cider vinegar in total. That is, by weight, roughly one thirty-seventh of a spoonful, before you even ask how much of it is still acid.
There is no authorised health claim for apple cider vinegar in the European Union. We read the whole annex to Regulation 432/2012, the one that lists the permitted claims: the words “vinegar”, “acetic acid”, “apple” and “cider” never appear in it. What can legally appear on a box is what the product contains, not what it does.
The study cited most often in the last two years, the Lebanese one from 2024, was retracted on 23 September 2025. The meta-analysis published in September 2025, which brings together ten studies, includes it. What remains are small studies, with high heterogeneity, on liquid vinegar, and their conclusion cannot be written on a label: it is not an authorised claim.
It is true that a gummy does not wash your enamel in acid the way vinegar drunk undiluted, or poorly diluted, does. It is false that it is neutral. It is still a sweet product that sticks to your teeth and stays there. A sweet gummy is never “zero acidity”, whoever writes that on the box.
Milligrams of vinegar are not a dose. A product with 1,000 milligrams of powdered vinegar diluted on a carrier can have less acetic acid than one with 400 milligrams of concentrate. The only honest comparison is on acetic acid, and almost nobody publishes that. Ask for the figure, not the big number on the front.
Apple cider vinegar is not harmless just because it is a food. Ask your doctor's advice if you take diabetes medication, because the effect on blood glucose can add to your treatment, if you take diuretics, or if you have had problems with potassium. There is at least one case report published in 2024, in an 84-year-old woman, of acute pancreatitis associated with a slimming supplement containing apple cider vinegar. A case report does not prove a cause, but it is worth knowing. The gummies are not to be given to children without medical advice, and in pregnancy and breastfeeding ask first. Do not exceed the recommended daily dose.
What is in our gummies
with apple cider vinegar and kombucha
After all the arithmetic above, it is only fair that you see the figures on our box too.
One serving is two gummies and contains 400 mg of apple cider vinegar and 300 mg of spray-dried kombucha. Sixty gummies in the box, raspberry flavour, no added sugar, made in Romania.
What they are good for, in the simplest sentence we can write: they are a pleasant way to take something every day that you otherwise would not, because liquid vinegar is hard to drink and harsh on your enamel. That is all. It is not a medicine, it is not a therapeutic dose and it does not replace anything on your plate.
And if you have read chapter 4, you already know which figure is worth asking any manufacturer on the shelf for: the amount of acetic acid, not of vinegar.
Frequently asked questions:
what you ask us most often about vinegar gummies
It depends for what. The studies that measured anything used liquid vinegar, at acetic acid doses between 750 and 1,681 milligrams a day. A serving of gummies provides, in the most realistic scenario, around 20 milligrams. The difference is not one of nuance, it is roughly fiftyfold. In the European Union, apple cider vinegar has no authorised health claim.
Almost no label says. Manufacturers declare milligrams of apple cider vinegar, not of acetic acid, and between the two there can be a factor of twenty, depending on how the vinegar was concentrated. If you want to compare a product with a study, it is the only figure that matters, and it is the figure you need to ask for.
The Lebanese study published in March 2024 was retracted on 23 September 2025. The journal states that the authors' analyses could not be reproduced, that multiple errors were found, and that the dataset showed patterns inconsistent with random allocation of participants and implausibly small p values for the number of participants. The authors agreed to the retraction.
No. The European list of authorised claims, the annex to Regulation 432/2012, runs to more than one hundred thousand characters of text. We searched it, word by word: “vinegar”, “acetic acid”, “apple” and “cider” appear zero times. A claim can only be attributed to a nutrient with an authorised claim, present in a significant amount.
A gummy does not rinse your mouth with acid, so it does not compare with vinegar drunk undiluted. But it is still a sweet, sticky product that sits on your teeth. The phrase “zero acidity on teeth”, wherever you read it, is too strong for a sweet product. Brush your teeth, but not straight afterwards.
Ask your doctor's advice if you take diabetes medication or diuretics, or if you have problems with potassium or your pancreas. There is at least one published case report of acute pancreatitis associated with an apple cider vinegar supplement. They are not to be given to children without medical advice, and in pregnancy and breastfeeding ask first.
For the amount of acetic acid that reaches you, none that shows up in the figures. “Double fermented for maximum potency” is a marketing phrase, not a measurement. If a manufacturer says it has concentrated the vinegar, then it can also state how much acetic acid is left in the serving. If it does not give the figure, the phrase remains a promise without a witness.
Note: the information in this article is for educational purposes. It does not replace personalised medical advice. Apple cider vinegar and kombucha have no authorised health claims in the European Union, and this article does not attribute any health effect to them. The doses quoted come from studies on liquid vinegar and cannot be transferred to any product in gummy form. Food supplements are not medicines and are not intended to diagnose, treat or prevent disease. Do not exceed the recommended daily dose. Keep out of the reach of children.
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