I've never tried them. However I do remember back when I worked at the Vitamin Shoppe, this big guy, probably early in his fifties sporting a du-rag and sweat pants pulled up clearly past his navel region, would buy a huge jar of the tabs along with with a box of met-rx every two weeks.I stopped asking people why they took certain supplements after my 3rd week there. Mainly because I usually received off the wall "fairy tale" answers in return 30% of the time.