. . there is no indication that vitamin C alone, an antihistamine alone, or vitamin C plus an antihistamine have any important effect on the duration or severity of infections of the upper respiratory tract." (The Vitamin Myth: Why We Think We Need Supplements)
Also, in more recent research conducted by Gøran Paulsen, it was found that vitamin C can hinder the effects of exercise. Mitochondrial proteins (COX4), which are important for improving muscular endurance, are slowed which forces muscle gain to occur at a much slower rate. Paulsen recommended to be cautious with vitamin C pills to avoid this problem. After releasing these books encouraging a higher vitamin C intake, Linus lost some respect from scientists. However, to the public he was still the smartest man in