About this item Plus Vitamin C: A convenient way to supplement with high amounts of these minerals, plus the added benefit of vitamin C Bones/Muscles: Supports bone and muscle health* Effervescent: Powder effervesces when mixed with water, resulting in the formation of optimally absorbed citrate, ascorbate, and glycinate minerals Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish Trusted: Thorne is chosen by champions and trusted by 100+ pro teams. Thorne is the only supplement manufacturer to collaborate with Mayo Clinic on wellness research and content. Thorne is also a proud partner of 11 U.S. Olympic Teams