Brought out on the nutritional field in 1946, Standard Process A-C Carbamide was created particularly for supporting the fluid transfer through tissues.This means that it acts as a physiological diuretic that promotes the formation and excretion of urine, thus keeping a balance for the fluid levels in the body. No Standard Process A-C Carbamide side effects were reported by the consumers and most of their feedback is positive. 2  It is made by one of the oldest nutritional companies which has more than eighty years of experience.