I can see vinegar mentioned in the hand book, but then on the shopping list its apple cider vinegar listed. Is this the only vinegar that can be used or can balsamic vinegar be used?

Bitter Melon (Momordica charantia) Herbal Monograph
Bitter melon (Momordica charantia) supports blood sugar control and may reduce food cravings. Its compounds, like charantin, enhance insulin sensitivity and stabilize glucose levels, potentially curbing sugar cravings. A 2018 RCT confirms its efficacy in lowering HbA1c