Hi, can I give vitamin d3 drops for my kid on a daily basis like 400 iu for life long...I hv come to know it is not getting absorbed in Indian skin though we get sunlight...same applies to kid...if blood test necessary...baby won't allow to do blood test...so is it be given to her without test...will it cause toxicity if taken life long or need few months gap in between doses...if taken life long won't it be add on n cause toxicity...NW a days vitamin k also needed along with Vitanin d supplements right...will tat v get enough from food to cope up with vitamin d...