I have been taking clen and keto for 2 weeks now, and I am up to these doses: 160 mcg clen, 2.5 mg keto daily. However, I no longer get the stimultory effects of clen, and I am not sure it is working anymore. I doubt the Keto is bunk, and I have only been using the clen for two weeks. I know the clen is top notch--same stuff I used a month ago. Is it possible that the stimulatory effects of clen go away, but the fat-burning effects remain when accompanied by enough Keto?