We've lost this battle, but I thought I'd like to stick a pin in the map to show where there used to be a perfectly good word: "healthful". It meant "good for you", and, in relation to food, was similar in meaning to "nutritious".
A piece of toast or a tomato might be "healthful" when eaten. However, a piece of toast cannot be "healthy", which means "enjoying good health". A tomato can only be "healthy" if it's still on the vine, thriving and free from disease.
Now, food is considered "healthy" if it's good for you. So is a brisk walk. So is a good attitude. Good-bye, healthful!