Nutrients in food that can boost immunity include vitamins A, C, D, and trace element zinc.

My sister’s child is already 9 years old, but he is small in stature and thin. She is worried about whether he lacks certain nutrients as he starts to change his teeth. What nutrients should a 9-year-old child supplement? Do they need to see a doctor for this condition?

Inquire about the issue of whether a 5.5-year-old baby will lose nutrients when eating blended vegetables and fruits.