A foul, sour, or unusual smell indicates bacterial contamination, which can develop when preservatives break down at elevated temperatures
But most of these products dont work as their active ingredients never reach the brain due to the blood-brain barrier
doi: 10.1111/epi.13848 132 ZhouKJiaLMaoZSiPSunCQuZet al
Emran T, Chowdhury NI, Sarker M, Bepari AK, Hossain M, Rahman GMS, Reza HM, Elsevier Masson (2021) L-carnitine protects cardiac damage by reducing oxidative stress and inflammatory response via inhibition of tumor necrosis factor-alpha and interleukin-1beta against isoproterenol-induced myocardial infarction
Immune Support: It plays a crucial role in boosting the bodys immune defences