We should not put the question. South nations use for the majority of products prohibited in Europe like creatin so inevitably that helps! and explain to me how it is possible that McCaw runs more quickly than Bortolussi ?
Creatin effectively does nothing, hence why nobody in their right mind actually uses it. If you are suggesting that New Zealand openly allows their players players to use anabolic steroids and human growth hormones than you sir a trending on a very fine line. Is it possible they are using drugs to help their performance? I sincerely doubt it because they are tested regularly. The only possible concern would be over HGH which currently can not be tested for acurately, even with a blood test. So the real answer to why McCaw runs more quickly than Bortolussi is simply because he is a better athelete. This man is the best player in world rugby, so obviously he must have been born with some serious genes.