Concern) Worries about healthy food

As I get older, it seems natural to become interested in health. At some point, a person begins to age and grow old. As a result, even those who were healthy when young start to get sick, which naturally draws attention to health. Now, I think I need to be more selective about what I eat, even if I used to eat anything freely. I'm worried about how much I should restrict myself, and I also feel a sense of emptiness. It would be great if there were a proper balance.