NOW Foods Betaine HCl 648 mg supports healthy stomach acid levels — a common concern for those experiencing bloating, gas, incomplete digestion, or the sensation of food sitting heavy after meals. Betaine hydrochloride is a natural source of hydrochloric acid that temporarily increases stomach acidity, supporting the optimal pH needed to activate pepsin (the primary protein-digesting enzyme), denature dietary proteins for complete digestion, and stimulate the cascade of digestive signals that trigger bile and pancreatic enzyme release. Stomach acid production naturally declines with age and is further suppressed by chronic stress, antacid medications, and H. pylori infection. NOW Foods provides 648 mg of betaine HCl per capsule — a significant clinical dose — manufactured in their GMP-certified facility. Best taken at the start of protein-containing meals.