They are research chemicals and are not approved for human use by regulatory bodies in many places
(now our HHS Secretary) tweeted that the FDAs war on public health included aggressive suppression of peptides, effectively moving these substances from clearly illegal to murky gray area overnight
This means that regardless of the time of day you take them, the actual amount reaching your cells may be minimal
Lang CN, Menza M, Jochem S, Franke G, Perez Feliz S, Brunner M, Koren G, Zehender M, Bugger H, Jung BA, Foell D, Bode C, Odening KE (2016) Electro-mechanical dysfunction in long QT syndrome: role for arrhythmogenic risk prediction and modulation by sex and sex hormones
Table 15
According to another study, Adderall can increase the risk of developing psychosis