What It Actually Is
Apple Cider Vinegar is made from fermented apples, containing acetic acid as its primary active compound.
What Research Generally Shows
Several studies suggest vinegar consumed with a meal may blunt the post-meal blood sugar rise, likely tied to acetic acid slowing carbohydrate digestion.
On The Dose
1,000mg is within the range used in some research, though studies vary widely in form (liquid vs. capsule) and timing relative to meals.