its effective, but no miracle drug IMO, i cycle fat loss drugs now, i just ran ECA for like 15 days, and i have a 2 day over lap where im starting T3, 12.5mcg for 3 days, then 25 for 4 and back to 12.5, then ill do 2 weeks clen, then back to the T3, and then finsh with ECA.....thats my plan for this cycle....less is better imo, i just wanna keep the fat burning going and keep my body guessing