Vitamins na pampagana

Hi momshies My son is going on his 18month now and napansin konl na naging mapili sya sa pagkain lately..i have tried a lot and believe me lahat na ata naexperiment ko na mauto ko lang sya still, he is clever enough na malaman na may gulay or prutas ung food nya. Gusto nya magdede lang ng magdede. He's taking propan tlc drops at ceelin with zinc since 6month old sya. Any suggestion po sa vitamins? Thanks in advance