Solgar Ester-C Effervescent Vitamin C Sachets, 1000 mg. This patented form of vitamin C supports immune system function. Ester-C is Solgar’s proprietary vitamin C that stays active in the body for up to 24 hours, offering higher bioavailability and longer-lasting vitamin C than standard preparations. The formula has a neutral pH to minimize potential gastrointestinal discomfort. In addition, the blend includes B vitamins for energy metabolism, zinc for immune and cognitive support, and magnesium to help maintain electrolyte balance. An alternative to tablets or capsules, it’s easy to take and pleasant to taste, with a natural orange flavor. Gluten-free and caffeine-free, it contains sugar and a sweetener. It is free from wheat, dairy derivatives, soy, yeast, and artificial flavors, and is suitable for both vegans and vegetarians.