Yes, I was told a few weeks ago I was very low in Vit D, was quite surprised as I had been taking supplements for quite a few weeks before that. However, you only get around 30% of Vit D from food, the rest is from good old sunshine, so if anyone is deficient, the best bet is to take cod liver oil tabs & get out in the sun regularly (if there is any, that is!)...it doesn't have to be for very long, just 20 - 30 mins a few times a week.