A pool of amber-gold unfiltered cider vinegar with visible mother strands. ← The FormularyDigestion

Apple cider vinegar

Also known as ACV, acetic acid
CEVIDENCE

The internet loves it. The evidence shrugs.

The honest take
Cider vinegar became a wellness fixture on the back of a handful of small studies and an enormous amount of repetition. There is some interesting work on blood glucose after meals, at liquid doses, in small groups. Capsules rarely disclose how much they contain, which makes even that hard to lean on. We stock it inside a blend because people want it, and we are not going to pretend it earns its reputation.
What it is
Fermented apple juice, dried to a powder for capsules. The active part is acetic acid.
How it works
Acetic acid may slow gastric emptying, which is the proposed route for the post-meal glucose findings. Dose and format both matter and both are usually undisclosed.
What it does
Very little that has been demonstrated at the doses capsules contain.
Who it's for
Someone who wants it in a convenient form and has read the above.
How to use it
With water, with food.
What to expect
Realistically, nothing you can point to.
The research
Grade C. No approved health claim. The glucose work is preliminary and uses liquid vinegar at doses capsules do not match.

Read the labelAcidic. Undiluted liquid erodes tooth enamel and can burn the throat; dilute it, and take capsules with a full glass of water — a lodged tablet has put oesophageal injury in the case literature. Can add to the potassium-lowering of diuretics and the glucose-lowering of insulin and diabetes medication, so mention it to your prescriber.

Evidence grades describe how well an ingredient is studied — A well-supported, C emerging — not a promise of results. Educational, not medical advice. Doses are typical ranges; follow the label on the product.