Burntide Official Website › Guides
Two Reference Guides, Written To Be Useful On Their Own
Two longer pieces sit beside the product pages here. One goes through what the apple cider vinegar research actually measured and at what dose. The other is a buying checklist for metabolism gummies, scored against Burntide itself, including the row where it fails. Both are written so they stay useful if you buy nothing at all.
Reference material rather than sales pages, which is why neither carries a product name in its headings.
Two reference pieces, and the blog
One about the evidence, one about buying, and the blog.
Why these pages are written this way
Sources that open, doses that are real, and failures that get printed.
These two pages exist because the useful version of a supplement website is the one that helps you decide correctly, including when the correct decision is not to buy. A reference page that quietly steers every paragraph toward a checkout is not a reference page.
So both guides follow the same rules the rest of this site does. Every claim carries a source that opens. Every dose is the dose the researchers used rather than the dose a marketer would like you to assume. Where a product fails a test, including this one, the failure is printed.
What is in the vinegar guide
The four human trials that matter, what each measured, the doses they used, the tolerability finding most write-ups skip, and the two safety papers on concentrated vinegar preparations.
What is in the buying guide
Nine checks that work on any product in this category, a worked scorecard, and the two rows Burntide does not pass. It is the page on this site that costs the product most.
What is in the blog
Five pieces on the commercial side: what a metabolism gummy should cost, how to match a pack to a refund window, how to read a price page, cost per serving against other formats, and what a journal logo on a sales page means.
Sources with nothing to sell you
Seven free references, all of them checked.
If you would rather read primary material than anything written here, these are the places to start. All of them are free, none of them is selling you anything, and every one was opened and checked before it was listed.
| Source | What it is good for |
|---|---|
| NIH Office of Dietary Supplements, weight-loss supplements | The most thorough free review of what ingredients in this category do and do not do |
| NCCIH, dietary and herbal supplements | How to read botanical evidence, and what a supplement is regulated as |
| FDA, questions and answers on dietary supplements | What a supplement may claim, and what approval does and does not mean |
| FDA, dietary supplement labeling guide | What a label must print, which makes a missing figure easier to spot |
| FTC, health products compliance guidance | The evidence standard a seller is expected to meet before making a claim |
| MedlinePlus, dietary supplements | Plain-language summaries, and interactions worth raising with a pharmacist |
| National Institute on Aging, supplements for older adults | Written for readers taking several medications at once |
Guides, product pages and the blog
Which is which, and where the commercial interest sits.
The product pages on this website are a different kind of thing and it is worth being clear which is which.
- The guides are about the category. They stay useful if you never buy anything.
- The product pages are about Burntide specifically: the panel, the ladder, the guarantee, the reviews. They are written carefully and this desk earns when you buy from them.
- The blog sits in between. It is about buying decisions in this category, using this product as the worked example.
Everything on all three carries the same sourcing rule and the same disclaimers, and the about page lists the places this site argues against its own commercial interest, because that is the only useful test of whether the rule is being followed.
Questions these guides answer
Seven questions and where each one is answered in full.
Between them the two guides answer the questions that come up before anybody has chosen a product at all. If one of these is what brought you here, this is where it is answered.
| Question | Which guide | The short answer |
|---|---|---|
| Does apple cider vinegar actually do anything? | The vinegar guide | Yes, modestly, at tablespoon doses over weeks. The effects are small and they reverse |
| How much vinegar did the studies use? | The dose spine | 15 to 30 ml a day, roughly 750 to 1,500 mg of acetic acid |
| Why do gummies contain so much less? | Four formats | Because the trade in every format is dose against whether you keep taking it |
| Is a proprietary blend a warning sign? | Check one, expanded | It is a limit rather than a warning. Treat the total as a ceiling on every ingredient |
| How do I compare two gummies? | The nine checks | Per-ingredient amounts, serving clarity, claims, window, contact, lot and assay |
| What does an FDA-registered facility emblem mean? | Testing and quality | A statement about a building. No supplement is FDA-approved |
| Which pack should I buy? | Pack against the window | The smallest one, unless you already know the product suits you |
What a reference page has to do
Four tests, applied to these guides as much as to anything else.
A reference page is only worth reading if it would survive its own advice. Four things separate one that is from one that is dressed up as one, and they are the same four this desk applies to itself.
Every claim opens
A source that is named but not linked is asking you to take its existence on trust. Every citation on these pages is a link, and every PubMed record was checked against the NCBI summary API before it was written down, because two guessed identifiers on a previous build turned out to be entirely different papers.
The dose travels with the finding
“Studies show vinegar helps with weight” is true and useless. The sentence has to carry the amount, the duration and the population, or a reader cannot tell whether it applies to what they are holding.
Failures are printed
The buying guide scores this product seven out of nine and names both failures. A checklist that a seller's own product passes completely was written after the score rather than before it.
The commercial interest is visible
This desk earns when an order is placed. That is on the about page with six examples of where the site argues against it, which is the only useful test of whether the disclosure means anything.
The research 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.
- 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 Center for Complementary and Integrative Health. Dietary and Herbal Supplements. https://www.nccih.nih.gov/health/dietary-and-herbal-supplements
- U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements. https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements
- U.S. Food and Drug Administration. Dietary Supplement Labeling Guide. https://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/dietary-supplement-labeling-guide
- Federal Trade Commission. Health Products Compliance Guidance. December 2022. https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance
- MedlinePlus, U.S. National Library of Medicine. Dietary Supplements. https://medlineplus.gov/dietarysupplements.html
- National Institute on Aging. Dietary Supplements for Older Adults. https://www.nia.nih.gov/health/vitamins-and-supplements/dietary-supplements-older-adults
Every page, every journal post, the bottle facts and the ingredients go through review by Dr. Alexis David, MD before they ship. We write these pages from the Burntide label, the Supplement Facts panel photographed on the jar, the pack ladder the official sales page prints, 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 seller’s own price page claims more than it 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. Alexis David, MD.