Struggling to concentrate or feeling low in mood
33 Non-specific cysteine transporters While influx transporters are the main means by which cells acquire cystine, cysteine can also be taken up from the extracellular milieu into cells directly by excitatory amino acid transporter 3 (EAAT3) and the alanine-serine cysteine transporters 1 and 2 (ASCT1/2), all of which are known to be overexpressed in different cancer types 34 (Table 1)
Rapetti-Mauss R, Picard V, Guitton C, Ghazal K, Proulle V, Badens C, et al
And if people need to suddenly stop consuming caffeine, he advises doing so gradually over a few days, to avoid any withdrawal symptoms
It is like reading a study about a drug delivered by targeted nanoparticles and then trying to replicate the results by drinking it