this is from havoc's label...
"Independent studies have shown that Havoc is not only 15 times more myotrophic than Halodrol-50 and 20x more myotrophic than ProMagnon, but has an incredible myotrophic ratio of 12, whereas Halodrol-50 has a myotrophic ratio of 2.6 and Pro-Magnon a ratio of only 1.1. What does this all mean? That on a milligram-per-milligram basis, Havoc is far less likely to induce undesirable, androgenic mediated-type side effects such as acne, hair loss, etc."
hope this helps