Glutamine Sour Berry 300g is an L-glutamine supplement with a sour red berry flavour, designed for those who prefer an alternative to sweeter tastes. It comes in a 300 g tub, with no added sugars, and dissolves smoothly in water or in a protein shake. The description recommends taking it with very cold water. Its formula contains L-glutamine, acidifier (citric acid), flavours and sweetener (Sucramix®). The L-glutamine is presented without being mixed with other amino acids. The product is formulated by Dr. Antelm Pujol, specialist in Endocrinology and Nutrition, and manufactured in its own plant in Spain, with traceability for each batch. To take it, dissolve the dose indicated on the label in water or in your shake. The described use is after training or spread throughout the day; it can also be mixed with the protein in the same glass. The information provided does not specify a numeric dose, so the tub should be checked. The label states that it may contain traces of milk, gluten and nuts.