Vilactin AA Plus Powder 15, Lemon Lime. Medical food for the dietary management of Maple Syrup Urine Disease (MSUD). Dispensed by prescription. Vilactin AA Plus Powder is a Leucine, Isoleucine, and Valine Free amino acid based medical food for the dietary management of MSUD for individuals over one year of age. Vilactin AA Plus Powder is nutritionally complete, contains DHA, prebiotic fiber, and a nutrient blend designed to support bone health. 30 count 1.4 oz. packets in case. 15 grams of protein equivalent per packet. 150 calories per packet and 4500 calories per case.