For skin brightening , most people start noticing a subtle glow after 3-4 weeks of regular treatments (usually 1-2 injections per week)
How Long Does It Take to See Glow
J Physiol Paris 91:173178 Sikiric P, Petek M, Rucman R, Seiwerth S, Grabarevic Z, Rotkvic I, Turkovic B, Jagic V, Mildner B, Duvnjak M et al (1993) A new gastric juice peptide, BPC
"Because these processes can emerge earlier or be more pronounced in people with HIV, this community can help us identify interventions that may improve healthspan more broadly." This study does not show that GLP-1 agonists can slow aging, however, and the study authors urge caution when interpreting the findings
Rahman I, Biswas SK, Jimenez LA, Torres M, Forman HJ (2005) Glutathione, stress responses, and redox signaling in lung inflammation