In my life i bought five different bulk powders of rhodiola standarized for salidroside, and only one of them have nootropic efects. (dopaminergic, cognitive enchancer, anti-add).
Powder was highly hygroscopic, after two -three days on free air, or even encapsulated it transform into mud-like substance, after about week it look like very hard wax.
Pictures below.
Attached Files
Edited by IP3, 04 February 2016 - 08:55 AM.