I guess Serge forgot about confessing to steroid use in an ironage issue of MUSCLEMAG:
Musclememory is your friend:
http://www.musclememory.com/magCovers/mmi/mmi014.jpg
Page 35:
Serge Nubret: "For the last twenty years I have been exercising for three or four hours, six days a week and the only questions I got asked is what drugs do I take? Nobody showed an interest in my training habits, yet this is what built my body, not drugs!
I have taken drugs yes, but I obtained 20" arms first. All the drugs did was harden me up slightly. I attribute my success to hard, long regular workouts and a diet which consists mainly of fish, meat, eggs and salads. Only after a contest will I be tempted to each [sic] a couple of plates of spaghetti...and then within a few days, I am back on my spartan diet."
So there you have it.