Is it healthier to use organic cosmetics?

To answer to this problem, we are regularly going to follow several blogs :

http://www.bioreflexe.com/index.htm

http://www.cosmebio.org/

http://www.parlonscosmetiques.com/

http://www.observatoiredescosmetiques.com/

http://www.afssaps.fr/Produits-de-sante/Produits-cosmetiques