Hi, what type of supplement would you consider to give for an 18 months old child and where can it be bought from? Just want to boost immune system as falling sick often though not in childcare yet.

I am giving Bicold (similar to Sambucol) which was recommended to me by the PD because my LO is always down with flu and cough. Last year in Sept, she was hospitalised for croup then two months later she got infected with Influenza A. She coughed so many months until she developed umbilical hernia. Then she caught another new virus in March this year so PD told me to give Bicold which is clinically proven for its effectiveness but must take the sup at least two months for the efficacy to show.