Yes, Zincovit syrup is generally safe for your 16-month-old, but the precise daily dose (typically 2.5 ml) should be confirmed by your pediatrician to match his specific needs. It is completely normal for teething babies to refuse food due to sore gums. To comfort him, try offering cool, soft foods like chilled yogurt, fruit purees, mashed bananas, or cold milkshakes, which soothe irritated gums. Gentle gum massages with a clean finger or a chilled teething toy can also help. Please do not force him to eat; keeping him hydrated is most important right now. If his appetite doesn't return soon, consult your pediatrician.