The second, TB-500, is a synthetic acetylated heptapeptide, Ac-LKKTETQ, corresponding to amino acids 17 to 23 of thymosin beta-4
This correlates with DSIP's documented promotion of delta wave (slow-wave) sleep
Kraus VB, McDaniel G, Huebner JL, Stabler TV, Pieper CF, Shipes SW, Petry NA, Low PS, Shen J, McNearney TA et al
Weeks 8-12 : More significant improvements in deeper wrinkles, continued collagen density increase, improved skin thickness (measured via ultrasound in clinical settings), and sustained reduction in age-related skin laxity
This mechanism represents a fundamentally different approach to fat metabolism compared to appetite suppression (GLP-1 agonists) or direct lipolysis stimulation (growth hormone peptides)
Since the response is dose-sensitive and even biphasic, careful studies test a spread of concentrations across several orders of magnitude rather than betting on one number