GAL and hyperinsulinemic hypoglycemia, familial, 4: While there are contradictory reports on whether GALT deficiency causes UDP‐Gal‐deficiency,32, 33, 34, 35, 36, 37, 38, 39, 40 there are several reports that glycan structures are Gal‐deficient, reduced, or irregular.41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52