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Dis maman, pourquoi il faut manger des produits laitiers ?
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... "parce qu'ils sont nos amis pour la vie", disait une vieille publicité... mais aussi pour renforcer nos os... La preuve en images, et c'est plutôt convaincant. Pour cette expérience, il faut des os de poulet, un récipient et du vinaigre blanc. On fait tremper les os dans le récipient rempli de vinaigre blanc pendant 2 ou 3 jours (on range ça dans un placard)... la suite dans les archives (16 février 2011)