His HPTA and hormones are still developing, by running a cycle at his age he's screwing that up to put it simply. Any 19nor (Tren/Deca) shutdown is brutal and is extremely hard on recovery, much worse than test.
DBol gains are always 90% water too, he made this post because he was concerned with all the water weight gain...not because he added 22lbs of lean muscle in 2weeks