This is not true. S-4 is suppressive, although much much less than steroids. I know two guys, who used 100 mg/day, and both experienced 50% suppression. This is a lot, but if you used a similar dose of any steroid, your test levels would be virtually zero.
Actually, mine are zero, too

(11,25 ng/dl). Anavar at 60-80 mg/day, for 2 months did the job.

Since I don't believe that Nolva could help me (I used it after my last cycle with Winstrol, and I lost all my gains within mere 2 weeks), I decided to take S-4 as a promising alternative. I started on Wednesday and I don't want to go over 20-25 mg/day. According to studies done in animals, 30 mg/day is a limit, below which you shouldn't observe any significant suppression. In theory, of course. It shouldn't be markedly anabolic at this dose, but I want to use it mainly as an anti-catabolic stuff. Since I don't take anything else, I am an ideal guinea pig for this purpose. I plan to do another bloodwork in mid-March.