I tried clen once. Ordered two bottles and threw one in the trash. Laying in bed feeling my heart beat in my neck like i just ran a marathon, 14 hours after i took it just didn't do it for me. lol. Ill stick With EPH/ECA. Hell the only reason it was banned was because retards would take 400 mg and play sports or go get wasted. A few bad apples truly does spoil the bunch......