During the winter, he should eat as much as possible and this drink should be wine as undiluted as possible.  Of cereals, he should eat bread, all his meat and fish should be roasted and he should eat as few vegetables as possible during winter-time.  Such a diet will keep the body warm and dry.
     When spring comes, he should take more to drink, increasing the quantity and making it more watery, a little at a time.  He should take softer cereals and less of them, substituting barley cake for bread.  Meat should be cut down in the same way, boiled meat replacing roast, and a few vegetables should be eaten once spring has begun...

Hippocratic Writings, page 272