The uk department of health advises that children under the age of 5 need a higher intake of vitamin d 10 micrograms rather than the general population rda of 5 micrograms this level of vitamin d is difficult to obtain from diet alone so a supplement with vitamin d is recommended vitamin d is needed for healthy growth and bone development in children as it helps bones to absorb calcium this lemon flavoured syrup is a great way to ensure intake of 100 rda of vitamin d along with 7 oth