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Apple Cider Vinegar and Metabolism: 1 Tablespoon vs a 525 mg Blend
Human trials of apple cider vinegar measured weight, fat mass, blood fats and the glucose rise after a meal, with modest results. They used 15 to 30 ml of liquid vinegar a day, about 750 to 1,500 mg of acetic acid. A whole Burntide blend is 525 mg, shared with three other ingredients. It is not a drug.
- Household vinegar is typically about 5 percent acetic acid. 15 ml holds about 750 mg; 30 ml about 1,500 mg.
- Best-known trial: 175 adults, 12 weeks, 15 ml or 30 ml a day against placebo. Small changes; they reversed after the trial stopped.
- Four human studies carry most of the weight: Kondo 2009, Johnston 2004, Hadi 2021 and Castagna 2025.
- One Burntide gummy: a 525 mg blend covering vinegar and three BHB salts. Vinegar share: not published.
- Vinegar's effect in trials was on the glucose rise after a meal, which is why the label says to take it before a meal.
- Some people need to ask a pharmacist first: glucose medicine, reflux, dental sensitivity.
Vinegar is old, cheap and well known, so the claim that it speeds the metabolism is easy to believe. The studies are more careful than the claim. This post looks at what was measured, at what dose, and what that means when the vinegar is one of four things in a small gummy. It is a reading of the research, not medical advice.
What is apple cider vinegar, in numbers?
Vinegar is dilute acetic acid. It is made by fermenting apple cider twice: first sugar to alcohol, then alcohol to acid. Household vinegar is typically around 5 percent acetic acid. That gives two numbers that run through every trial: a 15 ml tablespoon carries roughly 750 mg of acetic acid, and 30 ml carries about 1,500 mg.
| Amount | Acetic acid, roughly | Where it appears |
|---|---|---|
| 15 ml, one tablespoon | About 750 mg | Lower arm of the 12-week trial |
| 30 ml, two tablespoons | About 1,500 mg | Higher arm of the same trial |
| 20 g of vinegar with a meal | About 1,000 mg | The insulin sensitivity studies |
| One Burntide blend | Under 525 mg, shared four ways | What a gummy can hold in total |
Any product sold in another format has to be measured against those numbers, not against its own marketing.
Can apple cider vinegar speed up your metabolism?
The studies we cite did not measure the speed of the metabolism directly. They measured weight, body mass index, visceral fat, triglycerides, insulin sensitivity and the glucose rise after a meal. So the honest reading is narrower than the claim. Vinegar did something measurable to the glucose rise after a meal, and over months it was linked with small changes in weight and blood fats at tablespoon doses.
The Burntide label uses softer words: support a healthy metabolism. That is a broad phrase with no fixed meaning. It is not a promise of any change, and it sits beside the boxed FDA statement. No supplement is FDA approved, and no supplement is approved to treat obesity.
What did the four main studies find?
Kondo 2009 followed 175 Japanese adults with obesity for 12 weeks. Taking 15 ml or 30 ml of vinegar a day gave small drops in body weight, body mass index, visceral fat and serum triglycerides, compared with a placebo drink. The effects were modest and reversed once the vinegar stopped (Kondo et al., 2009).
Johnston 2004 was a single-meal study. Vinegar before a high-carbohydrate meal improved insulin sensitivity in people with insulin resistance or type 2 diabetes (Johnston et al., 2004). The effect fell on the meal that followed, which is why timing matters.
Hadi 2021 pooled randomised trials and found significant but modest effects on blood fats and glucose, clearest in people with type 2 diabetes (Hadi et al., 2021). Castagna 2025 looked at body composition in people with type 2 diabetes or overweight and reached a similarly careful conclusion (Castagna et al., 2025).
None of these authors calls vinegar a weight-loss treatment.
Why is tolerability the real limit?
A 2014 study set out to test vinegar's effect on appetite and found that the drop in appetite was driven by nausea, not by anything metabolic (Darzi et al., 2014). If a product works by making you feel slightly unwell, it will work in a lab and fail in a kitchen, because nobody keeps doing it.
That is the best argument any gummy has: a form people keep using beats a form that works better and gets dropped in week two. It is also the limit of the argument. A gummy solves the habit problem by holding much less acid. That trade is the subject of our post on gummies against capsules, pills and drops.
How much vinegar is in a Burntide gummy?
Not published. Apple cider vinegar is the first ingredient inside the 525 mg blend, which means it is the largest of the four by weight. That is all the label shows. The blend is smaller than the acid in one tablespoon of vinegar, and the vinegar share is a fraction of the blend.
| Label and policy fact | What is printed |
|---|---|
| Blend | 525 mg for four ingredients; vinegar share not published |
| Serving | 1 gummy, 2.5 g; 30 in a jar |
| Price ladder | $89, $177 or $294 for 1, 3 or 6 jars |
| Guarantee | 60 days from purchase on every pack |
Whether the vinegar in a gummy is raw or filtered, or what form it takes, is not stated either. The phrase with the mother does not appear in the label material we hold, so we make no claim about it. A thing that is not printed is not published.
What does the safety research on vinegar say?
- Throat injury. A 2005 report described injury after an apple cider vinegar tablet lodged in the throat, and found the labels of commercial products unreliable (Hill et al., 2005). The Burntide label says to take it with a full glass of water.
- Teeth. Laboratory work found enamel erosion from different vinegars (Willershausen et al., 2014). Rinse with water after a chew.
- Glucose medicine. Vinegar's effect on the glucose rise after a meal is the same process some medicines use. Ask a pharmacist.
- Potassium and heavy long-term use. Reports exist at case level, not as trials. No one calls a tablespoon a day dangerous, and no one has studied very high long-term intake well.
General guidance on supplements and medicine is published by the NCCIH. A doctor or pharmacist who knows your medicine list is better still.
Medical note. 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. Burntide is a dietary supplement and, like every supplement, it is not FDA-approved. It is for healthy adults aged 18 and over. Talk to a doctor or pharmacist before use if you take medication or have a health condition.
Frequently asked questions
Is there proof that apple cider vinegar boosts metabolism?
The cited trials measured weight, fat mass, blood fats and the glucose rise after a meal, with modest results. They did not report the speed of the metabolism directly.
How much acetic acid is in a tablespoon of vinegar?
Household vinegar is about 5 percent acetic acid, so 15 ml holds roughly 750 mg and 30 ml roughly 1,500 mg.
Is the vinegar in Burntide the same as the trial doses?
No. A whole gummy holds a 525 mg blend shared by four ingredients, which is less than the acid in one tablespoon. The vinegar share is not published.
What does the label mean by support a healthy metabolism?
It is a broad structure-function phrase with no fixed meaning. It is not a promise of any result.
Is apple cider vinegar safe for everyone?
No. Ask a pharmacist if you take glucose-lowering medicine or have reflux or sensitive teeth. Concentrated tablets have caused throat injury in a reported case.
Does Burntide say it contains the mother?
The label material we hold does not mention it. We make no claim either way.
Our view
Vinegar has a modest research base at tablespoon doses, and a very small share in a gummy. Both facts are true at once. A page that tells only one of them is selling, not explaining.
If the question is metabolism, treat any supplement as a minor helper at best, and keep the main work where it belongs: food, sleep and movement. The seller's own third bonus guide says as much.
Sources cited in this post
- Kondo T, Kishi M, Fushimi T, Ugajin S, Kaga T. Vinegar intake reduces body weight, body fat mass, and serum triglyceride levels in obese Japanese subjects. Biosci Biotechnol Biochem. 2009;73(8):1837-43. PMID 19661687. https://pubmed.ncbi.nlm.nih.gov/19661687/
- Johnston CS, Kim CM, Buller AJ. Vinegar improves insulin sensitivity to a high-carbohydrate meal in subjects with insulin resistance or type 2 diabetes. Diabetes Care. 2004;27(1):281-2. PMID 14694010. https://pubmed.ncbi.nlm.nih.gov/14694010/
- Hadi A, Pourmasoumi M, Najafgholizadeh A, Clark CCT, Esmaillzadeh A. The effect of apple cider vinegar on lipid profiles and glycemic parameters: a systematic review and meta-analysis of randomized clinical trials. BMC Complement Med Ther. 2021;21(1):179. PMID 34187442. https://pubmed.ncbi.nlm.nih.gov/34187442/
- Castagna A, et al. Effect of apple cider vinegar intake on body composition in humans with type 2 diabetes and/or overweight or obesity. Nutrients. 2025;17(18):2986. PMID 41010525. https://pubmed.ncbi.nlm.nih.gov/41010525/
- Darzi J, Frost GS, Montaser R, Yap J, Robertson MD. Influence of the tolerability of vinegar as an oral source of short-chain fatty acids on appetite control and food intake. Int J Obes (Lond). 2014;38(5):675-81. PMID 23979220. https://pubmed.ncbi.nlm.nih.gov/23979220/
- Hill LL, Woodruff LH, Foote JC, Barreto-Alcoba M. Esophageal injury by apple cider vinegar tablets and subsequent evaluation of products. J Am Diet Assoc. 2005;105(7):1141-4. PMID 15983536. https://pubmed.ncbi.nlm.nih.gov/15983536/
- Willershausen I, Weyer V, Schulte D, Lampe F, Buhre S, Willershausen B. In vitro study on dental erosion caused by different vinegar varieties using an electron microprobe. Clin Lab. 2014;60(5):783-90. PMID 24839821. https://pubmed.ncbi.nlm.nih.gov/24839821/
- National Center for Complementary and Integrative Health. Dietary and Herbal Supplements. https://www.nccih.nih.gov/health/dietary-and-herbal-supplements