Everything living needs the right combination of nourishment, in various forms. Plants need the right soil, fertilizers, sun, and moisture. Animals need water, protein, grains, good air, sunshine, and exercise. The same is true for humans.
People need the right combination of nourishment from the right combination of food: protein, carbohydrates, vitamins, minerals, sugars, and fibers. We need plenty of water and good air. We have to get some exercise, limber our joints, and stretch and release our muscles. We need sunlight, and we need night time for rest. We need all of these things every day.
Most of all, we need love and a purpose in life. That comes from God, directly and from others shining their love and godliness into our lives.