Key Features The ONLY chewable tablet that is formulated to closely resemble the electrolyte profile lost in sweat: sodium, potassium, calcium and magnesium. FASTCHEWS help to reduce muscle cramping and heat stress, boost stamina, and maintain electrolyte levels. Chewable tablets provide fast absorption through buccal mucosa (tissue in mouth). Made in the USA — Free of banned substances and independently tested. Learn more about our manufacturing and safety. Each serving (2 tablets) contains: 100 mg sodium, 30 mg potassium, 10 mg calcium, 6 mg magnesium. View the Comparison Table. Suggested use: 2 tablets per 15-30 minutes during activity. Tart Orange, Zesty Lemon-Lime, Seedless Watermelon and Perfectly Peach natural flavours encourage consumption. Ingredients are: non-GMO, gluten-free, vegetarian, fat-free. Natural stevia as sweetener. No colour added. Bio-available active ingredients. View all the Fastchews ingredients. Also great for youth sports, travel rehydration, tennis and other sports, camping & hiking, effects of alcohol.