Caffeine or another substance could be the reason for the improvement
Here we present the antioxidant GSH as a potential unexplored way for further investigation as intervention to counteract inflammaging, premature inflammaging, inflammatory diseases and long-COVID-19-syndrome, since GSH levels are correlated with tissue and organ damage, disease severity and progression, and disease outcome (294296, 298, 299)
Redox Signal 15 , 21352146 (2011)
[8] Are there alternatives if injections are inconvenient
Chem Soc Rev 51:71387169 Li Y, Xia X, Hou W, Lv H, Liu J, Li X (2023) How effective are metal nanotherapeutic platforms against bacterial infections