In March 2024, the journal BMJ Nutrition, Prevention & Health published the results of a study that explored apple cider vinegar's effects on weight loss. A year and a half later, publisher BMJ Group has issued a retraction of the paper, following the efforts of a team of statisticians to replicate the results. The publisher's announcement cites the presence of "multiple analytical errors" and "irregularities in the data set."
Apple cider vinegar may slow carbohydrate breakdown, delay stomach emptying, and increase insulin sensitivity, possibly preventing rapid blood sugar spikes after meals.