An object of the present invention is to provide stable powdery preparation of L-Ascorbyl-2-phosphate-6-fatty acid and its salt.To solve the problem, there is provided a freeze-dried preparation of water solution which contains L-Ascorbyl-2-phosphate-6-fatty acid and L-alanyl-L-glutamine.本發明提供穩定的L-抗壞血酸-2-磷酸-6-脂肪酸及其鹽的粉末製劑。提供含有L-抗壞血酸-2-磷酸-6-脂肪酸和L-丙胺醯-L-麩胺醯胺的水溶液的冷凍乾燥製劑。