The body is the instrument with which Spirit interacts with the material world. Just as the Infinite Energy Source is as real as the body, the body is as divine as Source. The more that the body is nurtured and respected, the more effective it will be in fulfilling our desires.
The elements of maintaining a healthy body are well established: nutritious fuel (more fruits and vegetables and less saturated fats and processed foods), exercise, and sleep and relaxation.
Once we fully inhabit our body, it will generally tell us what it needs. Also, by fully being present within our body, our consciousness is connected with Source and Source can freely express itself through us.
Let's respect our bodies. It is so much more than we think it is.