I have been on rad140 for four weeks now. I purchased it from proven peptides. I am beginning to believe that what I got may not actually be rad140. I started off with 20mg/ed, but by day two I had a persistent headache and by day 4 went down to 15mg/ed and the headaches went away. I also have been getting a lot of acne on my arms while on it. I havent noticed much of a difference in strength but have had a few people I work with make comments about how much larger I have got. I dont feel "good" like ostrine, but more run down and tired.