Natural Factors Big Friends Magnesium Citrate Chewable - Provides an easy, chewable way to support children’s healthy growth and development. Each delicious bubble gum-flavoured chewable tablet contains 50 mg of magnesium citrate needed to support proper energy metabolism, tissue formation, muscle function, and bone development. This easy-to-take one-per-day formula is gently sweetened with xylitol and stevia.