Adapting to a plain and simple diet requires time to restore natural taste and stomach health.

Original passage

Persons who have accustomed themselves to a rich, highly stimulating diet have an unnatural taste, and they cannot at once relish food that is plain and simple. It will take time for the taste to become natural and for the stomach to recover from the abuse it has suffered. But those who persevere in the use of wholesome food will, after a time, find it palatable. Its delicate and delicious flavors will be appreciated, and it will be eaten with greater enjoyment than can be derived from unwholesome dainties. And the stomach, in a healthy condition, neither fevered nor overtaxed, can readily perform its task.