The most wholesome nutriment for man is plain food. An accumulation of flavours is injurious, and still more so, if heightened by sauces. All acrid elements are difficult of digestion, and the same is the case if food is devoured greedily, or in too large quantities. Food is also less easily digested in summer than in winter, and in old age than in youth. The vomits which man has invented, by way of remedy for this evil, render the body more cold, and are more particularly injurious to the eyes and teeth.