Never used alone. Only in recompadrol.
1) Phellodendron-->BARBERINE,
Lagerstroemia speciosa -- Banaba Extract --> corosolic acid
Gymnema Sylvestra (75% Extract) ----->gymnemic acid
salacia reticulata and garcina cambigia
are (in my opinion) all good for carb control and in a way damage control in cheat meals
2) ALA (r-ala), D-Pinitol, Cinnulin, taurine, chrome , L-Alnine , Fenugreek (4-hydroxyisoleucine ) .... are (in my opinion) MORE to take the best from carbo and food. (to bulk)
When I see (always in my experience) (1) and (2) mixed in a supplement.... I'm always skeptical ...or at least I have to take much attention on use it.
I can agree that Gymnema Sylvestre can be helpfull on both situations.