https://www.amazon.com/Douglas-Laboratories%C2%AE-L-Histidine-Neurological-Cardiovascular/dp/B000UV5A2C
https://www.amazon.com/L-Histidine-500mg-200-Capsules-Naturetition/dp/B01A62U4H0
is one of these HCL good? if not can you see any of them on amazon that are good?