BPC-157 and TB-500 are experimental compounds and are not FDA-approved veterinary medications
An enzyme called tyrosinase is needed to create melanin (the pigment that causes the brown spots) and while several other skin lightening agents work to inhibit the synthesis of tyrosinase itself (like vitamin C or licorice), arbutin lets tyrosinase be and rather hinders the melanin-forming activity of the enzyme
it doesn't change the potency of the three ingredients GLOW and KLOW have in common
If you're new to the topic, Peptides 101: The Instruction Manual for Your Cells covers the fundamentals
Reduced Breakouts: Acne breakouts can be a common concern for individuals with oily and sensitive skin
J Am Acad Dermatol 67(4):630635 Kardaun SH, Sekula P, Valeyrie-Allanore L, Liss Y, Chu CY, Creamer D, Sidoroff A, Naldi L, Mockenhaupt M, Roujeau JC et al (2013) Drug reaction with eosinophilia and systemic symptoms (DRESS): an original multisystem adverse drug reaction