Thermogenic for Women

Can anyone out there recommend a good thermogenic product for women? My wife has been searching for something to help with her fat-loss efforts but most products out there don’t seem to work for her. I would love for her to try the new Fahrenheit product Biotest just came out with but it has red dye in it, which she is allergic to. So that’s out unfortunately. Does anyone have any good suggestions? Thanks!!

Sean