Camu Camu (Myrciaria dubia) is a small tree that can be found all over the Amazon. Royal Green 100% pure Camu Camu is a ‘full spectrum’ vitamin C. It contains besides vitamin C also hundreds of extra plant nutrients, like bioflavonoids and enzymes. The vitamin C in Royal Green Camu Camu is naturally occurring and therefore not a synthetic ascorbic acid or a so-called ester-C. Vitamin C contributes to the normal function of the immune system. Is the Vitamin C you are using really natural? Probably not! Ninety-nine percent of all Vitamin C supplements on the market are synthetic. Some examples of synthetic Vitamin C are ascorbic acid, calcium ascorbate (Ester-C) or potassium ascorbate. These are synthetic forms of the vitamin C and not natural.