For by me (wisdom) your days will be multiplied, and years of life will be added to you. (Proverbs 9:11)
Wisdom comes with a myriad of fringe benefits, one of which is a long healthy life. Therefore, we are to use wisdom with regard to the physical care of our bodies. This wisdom demands discipline. We are to discipline our eating habits. Fad diets are not disciplines. Changing poor eating habits is a lifestyle requirement.
The apostle Paul told young Timothy, “bodily exercise profits a little.”(1) This was in a day when people walked wherever they went. Although there were few machines to do the manual labor required on a daily basis, exercise had profit. How much more do we need it in our day? It does not take profound wisdom to know that unless we care for these bodies God calls temples, they are just not going to last very long.
You have great value. God has a lifelong purpose for you. To fulfill that purpose, we will need healthy bodies. It is a matter of elementary wisdom.