It's a funny business, nutrition.
Sports nutrition is even funnier.
While a Government scientific committee has issued a warning that taking more than 10mg of B6 a day 'may damage nerve endings', the Colgan Institute of Sports Nutrition in San Diego, California, actually recommends taking 150mg daily to boost the oxygen-carrying powers of the blood. Some cases of nerve damage have been reported at an intake of only 117mg a day. Fortunately, most cases clear up spontaneously within six months of stopping supplementation. To answer that, we must take a closer look at this vitamin. The reasons for ensuring an adequate intake is that B6 contributes actively to many chemical reactions of proteins and amino acids.