The alimentary habits have been analyzed in 440 infant with acute and chronic disease of nutrition. It has been observed a high incidence of dietetic mistakes, whether qualitative or quantitative. These mistakes appeared in correlation with the poor cultural and socio-economic conditions of the population. The Authors compare the observed pathology with the wrong alimentary habits conditioned by low social context and suggest an adequate prophylaxis of infant's nutrition disease, thorough better alimentary habits in childhood and better life conditions of the population.