Apple Cider Vinegar (ACV) is a fermented liquid made from crushed apples, and it's one of the most recognizable ingredients in the weight-management supplement category.
Its acetic acid content has been studied for potential effects on appetite and post-meal blood sugar response, though research on ACV specifically for weight loss shows modest, inconsistent results across studies.
Putting it in a gummy format sidesteps the sharp taste and tooth-enamel concerns that come with drinking liquid ACV directly, which is likely the main practical reason it's formulated this way here.
Where it sits in the formula: one of two ingredients in BurnTide's 525mg blend, alongside BHB Salts (Calcium, Magnesium & Sodium).