A skin beautifulness promotion agent comprises an effective amount of dried powder of platelet and a medically acceptable solvent and/or excipient. The effective amount is each milligram of the skin beautifulness promotion agent containing at least 1,000 platelet cells. In which the dried platelet powder is used to prevent wrinkles, improve skin firmness and prevent the problem of skin aging, and to stimulate the growth of new cells.一種美膚促進劑，其含有效劑量的血小板乾粉及醫藥可接受之溶劑及/或賦形劑，其中所謂有效劑量，係指每毫克美膚促進劑中，至少含1,000個血小板細胞。
