never heard such a thing, and quite to the contrary I have read that taking an eca stack helps prevent muscle catabolism when coming off the juice, so I guess you can always find an article or a study to oppse another, all we have left in this day and age of compnays bashing others for self promotion and study after study fabricated for personal gains is our personal experience and I would have to say I have never in 8 yrs of eca stacks experienced any types of anti protien synthesis, but I would love to read the article and reasoning behind the comments