Burntide Official Website › Apple Cider Vinegar Guide
The Apple Cider Vinegar Guide
Apple cider vinegar is fermented apple juice and the component with a research record is acetic acid. Human trials have measured post-meal glucose, insulin, reported satiety and gastric emptying, using 15 to 30 ml of liquid vinegar a day. Dose is what the evidence turns on, and it is where most supplement forms fall short.
What the trials measured, what they used, and what survives when the same ingredient is put in a chewable. Nothing is sold on this page.
What apple cider vinegar actually is
Cider is what you get when apple juice ferments once and the sugars become alcohol. Vinegar is what you get when it ferments a second time and a culture of acetic acid bacteria turns that alcohol into acetic acid. Apple cider vinegar is therefore an apple-derived dilute acetic acid solution, typically around 5% acid, plus trace compounds from the fruit.
That matters for two reasons. The first is that the apple is almost incidental: distilled white vinegar has the same acid at similar strength, and most of the mechanism proposed for cider vinegar is acetic acid rather than anything apple-specific. The second is that the word “raw” and the cloudy sediment called the mother describe residual culture rather than potency.
For a supplement buyer the practical consequence is that the useful question about any vinegar product is how much acetic acid it delivers. That figure is printed on a supermarket bottle as an acidity percentage and it is almost never printed on a capsule or a gummy.
What the human trials measured
The literature is small, mostly short, and mostly conducted around meals. Here it is, with what each study measured and what it used.
| Study | What it measured | What it used | What it found |
|---|---|---|---|
| Ostman 2005 | Glucose, insulin and reported satiety after a bread meal | Vinegar at meal, healthy subjects | Lower post-meal glucose and insulin, higher reported satiety |
| Johnston 2004 | Insulin sensitivity to a high-carbohydrate meal | 20 g vinegar in water before the meal | Improved sensitivity in insulin-resistant subjects |
| Hlebowicz 2007 | Gastric emptying rate | Vinegar with a meal, small pilot group, type 1 diabetes | Slower gastric emptying |
| Kondo 2009 | Body weight, body fat and triglycerides over 12 weeks | 15 or 30 ml daily, obese Japanese adults | Small reductions in the vinegar groups |
| Launholt 2020 | Safety and metabolic parameters across the literature | Systematic review | Effects mostly small, evidence mostly low quality |
| Arjmandfard 2025 | Glycaemic control and insulin sensitivity in type 2 diabetes | GRADE-assessed dose-response meta-analysis | Dose matters, and the certainty of evidence is graded rather than assumed |
Two features of that table are worth naming. Every entry measured something around a meal, which is why every label in this category tells you to take the product before food. And the two most recent entries are the two that assess the evidence rather than add to it, which is generally where the honest reading of a small literature lives.
The dose question
This is the section that decides everything else, and it is the one a product page has every incentive to skip.
The trials above used 15 to 30 ml of liquid vinegar a day, which at around 5% acidity is roughly 750 to 1,500 mg of acetic acid. The 2025 meta-analysis is described in its own title as dose-response, which is a formal way of saying the effect tracks the amount.
| Form | Typical amount per serving | Acetic acid delivered | How it compares to the trials |
|---|---|---|---|
| Liquid vinegar, one tablespoon | 15 ml | About 750 mg | The low end of the trial range |
| Liquid vinegar, two tablespoons | 30 ml | About 1,500 mg | The high end of the trial range |
| A typical ACV capsule | 500 mg of vinegar solid | Not usually stated | A fraction, and usually unstated |
| A typical ACV gummy | 250 to 600 mg of vinegar solid | Not usually stated | A fraction, and usually unstated |
| A blended gummy such as Burntide | Inside a 525 mg blend with three other ingredients | Not stated | The whole blend is smaller than the acid in one tablespoon |
The honest conclusion of this guide, stated in the middle rather than buried at the end. If what you want is the amount of acetic acid the trials used, the cheapest and most reliable way to get it is a supermarket bottle of vinegar, diluted in water, taken before a meal. No gummy on the market delivers a trial dose, and most do not print enough information for anybody to work out what they do deliver.
Liquid against a gummy
If liquid wins on dose, the obvious question is why anybody sells a gummy. The answer is compliance, and it is a better answer than it first sounds.
Liquid vinegar is unpleasant
Sharply acidic, and it has to be diluted. Most people who start a daily vinegar routine stop inside a month, which makes the trial dose theoretical for them.
Measuring is friction
A tablespoon, a glass, water, timing. Every step is a chance to skip a day, and a supplement not taken has an effect size of zero regardless of dose.
Acid and enamel
A published case report traced dental erosion to repeated undiluted vinegar. Dilution and a straw manage it; a chewable reduces the contact time but adds sugar.
A gummy is a prompt
Attached to a meal, needing no preparation, it survives a bad week. That is a real advantage and it is the only one. It does not recover the dose.
So the trade is straightforward once it is stated: liquid gives you the dose the research used and a routine most people abandon; a gummy gives you a routine you will keep and a dose nobody has tested. Neither is obviously right, and a page that only sold one of them would not tell you that.
Safety, and the three caveats
Vinegar is food, and at food amounts it is about as safe as things get. Three caveats are still worth carrying.
- ✓Teeth. Erosion has been documented with repeated undiluted use. Dilute it, do not swill it, and rinse with water afterwards rather than brushing immediately.
- ✓Medication. Vinegar has been studied alongside glucose-lowering treatment. If you take any, the interaction question belongs with the prescriber.
- ✓Throat and stomach. Undiluted vinegar can irritate both. The 2020 systematic review covers the reported adverse effects, and they cluster around concentrated use.
- ✓Expectations. The ODS fact sheet on weight-management supplements is the neutral read on how much any ingredient in this category has been shown to do, and it is sobering.
How to test vinegar on yourself
If you have read this far, you want a method rather than an opinion. Here is the one this desk would follow, and it costs nothing.
Decide what you are testing
Post-meal sluggishness, afternoon snacking, or a waist measurement. One thing. Write down how you will measure it before you start.
Pick the form you will actually keep up
If you know you will not drink diluted vinegar every morning, do not buy a bottle of it. The dose advantage of a form you abandon is zero.
Give it a month and judge it once
Measure the same way, at the same time, once a week. Four data points and a start date beat any amount of impression.
And the part nobody sells: the NIH Office of Dietary Supplements is blunt that supplements do not replace food, sleep and movement, and MedlinePlus says the same in fewer words. A walk after dinner has more evidence behind it than any vinegar product, costs nothing, and the two are not mutually exclusive.
Where this leaves Burntide
This guide sits on a website that sells an apple cider vinegar gummy, so it should say where it leaves that product.
Burntide names apple cider vinegar first inside a 525 mg proprietary blend, which makes it the largest of four ingredients and puts a hard ceiling on it well below anything in the dose table above. The label does not publish the split and does not state the acetic acid content. On dose, this guide's conclusion applies to it exactly as it applies to every other gummy in the category.
What it offers instead is the compliance argument, a printed blend total where many competitors print nothing, and a 60-day window in which to find out. Whether that is worth buying is a judgement, and it is one you are better placed to make having read this page than having read a sales page. The dose comparison for this specific product is here.
References behind this Burntide page
Every source below was opened and checked. None of them studied Burntide itself; they concern the ingredients, at the amounts the researchers used.
- 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/
- Ostman E, Granfeldt Y, Persson L, Bjorck I. Vinegar supplementation lowers glucose and insulin responses and increases satiety after a bread meal in healthy subjects. Eur J Clin Nutr. 2005;59(9):983-8. PMID 16015276. https://pubmed.ncbi.nlm.nih.gov/16015276/
- Hlebowicz J, Darwiche G, Bjorgell O, Almer LO. Effect of apple cider vinegar on delayed gastric emptying in patients with type 1 diabetes mellitus: a pilot study. BMC Gastroenterol. 2007;7:46. PMID 18093343. https://pubmed.ncbi.nlm.nih.gov/18093343/
- Launholt TL, Kristiansen CB, Hjorth P. Safety and side effects of apple vinegar intake and its effect on metabolic parameters and body weight: a systematic review. Eur J Nutr. 2020;59(6):2273-2289. PMID 32170375. https://pubmed.ncbi.nlm.nih.gov/32170375/
- Arjmandfard D, Behzadi M, Sohrabi Z, et al. Effects of apple cider vinegar on glycemic control and insulin sensitivity in patients with type 2 diabetes: a GRADE-assessed systematic review and dose-response meta-analysis of controlled clinical trials. Front Nutr. 2025;12:1528383. PMID 39949546. https://pubmed.ncbi.nlm.nih.gov/39949546/
- Gambon DL, Brand HS, Veerman EC. [Unhealthy weight loss. Erosion by apple cider vinegar]. Ned Tijdschr Tandheelkd. 2012;119(12):589-91. PMID 23373303. https://pubmed.ncbi.nlm.nih.gov/23373303/
- National Institutes of Health, Office of Dietary Supplements. Dietary Supplements for Weight Loss: Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/WeightLoss-HealthProfessional/
- National Institutes of Health, Office of Dietary Supplements. Dietary Supplements: What You Need to Know. https://ods.od.nih.gov/factsheets/WYNTK-Consumer/
- U.S. National Library of Medicine, MedlinePlus. Dietary Supplements. https://medlineplus.gov/dietarysupplements.html
Every page, every journal post, the bottle facts and the ingredients go through review by Dr. Spencer Berry, MD before they ship. We write these pages from the Burntide label, the Supplement Facts panel photographed on the jar, and the distributor’s own paperwork. We cite public research for apple cider vinegar and beta-hydroxybutyrate, and we print “not published” wherever the label withholds a figure rather than estimating it. Where the manufacturer’s own listing artwork claims more than the panel supports, we say so on the page. Corrections are made on the page itself and the review date moves forward. Write to [email protected]. Last reviewed September 2026 by Dr. Spencer Berry, MD.