Fasting

http://cristivlad.com/the-molecular-mechanisms-of-fasting-excerpt-from-periodic-fasting/

http://www.nationalpost.com/m/wp/blog.html?b=news.nationalpost.com//health/fasting-for-three-days-renews-entire-immune-system-protects-cancer-patients-remarkable-new-study-finds

http://www.slate.fr/story/100539/jeuner-trois-jours-systeme-immunitaire

http://www.myhealthwire.com/news/herbs-supplements/963