Thymosin beta 4 acetate is a peptide which can be quite beneficial for healing of injuries, both acute and chronic, and for treatment of tendinitis. It can also improve flexibility where this has been impaired by injury, and in some cases has partially regrown lost hair. The ordinary course of treatment is 2.0 or 2.5 mg taken by injection twice per week for 4-6 weeks, followed by monthly or twice-monthly injection of 2.0 or 2.5 mg as needed.