All ZeroMet products are concentrated, mostly highly concentrated and methionine (Met)-free mixtures of highly purified L-amino acids, enriched with cystine. ZeroMet products are balanced diets for use in the dietary management of homocystinuria - fortified with vitamins, minerals and trace elements. There are several products for each age group, which differ in properties such as the form of administration. They can be very easily substituted for one another or combined with each other throughout the day.