From what I understand. EQ will increase collegan production, much in the way deca does. I believe that deca has an added anti inflammant effect that I have not seen with EQ but none the less, EQ will help to heal soft tissue on a similat way. Just remember that this still takes awhile to kick ink so give yourself a longer window, maybe 16 wks, to make use of the long acting compound. Of course, you want to run some test with your cycle too
As for potential harm, EQ will increasae RBC. If you run it at a moderate dose, say 400mg EW, you should be just fine, but I find that blood can get quite thick at 600mg or more EW. In this case, I keep an eye on it and plan to donate a pint of blood 8 wks in