i would recommend oxyelite .. but then if u are in tight budget then u can try api fat burner advance .. dono about the side effects .. i would say it depend on individual .. one more option is lipo 6 UC( not the lipo 6 black version but ultra concentrate). the UC series is halal if i am not wrong .. i tried b4 .. works well but then i feel like overdose everytime i took .. so i gave up on it ..