Try soaking fish in vinegar and water before cooking it. It will be sweeter, more tender and hold its shape better. When boiling or poaching fish, a tablespoon of vinegar added to the water will keep it from crumbling so easily.
Does the Short-Term Use of Continuous Glucose Monitoring Detect Favorable Effects of Vinegar Ingestion at Mealtime in Adults with Prediabetes? A Pilot Trial
Clinical trials suggest that daily vinegar ingestion improves fasting blood glucose concentrations, postprandial glucose excursions, and hemoglobin A1c levels in