Do professional athletes take supplements?

[ebisimark0013]

The average number of years of professional athletes' practice was 12.83 y. ... The greatest number of food supplements was consumed by weight lifting athletes (10 types of FS daily). The supplements included glutamine, caffeine, FS for joints support, creatine, protein, magnesium and amino acids.

http://zulurunner.com/5-essential-health-supplements-for-athletes/