I’m currently taking a 3,000 iu vitamin D spray from Holland and Barrett (UK). I wondered what brands you are using and where from? I am trying to find one that is between 3,000 – 5,000 iu that other people are using. Also, have you noticed a difference in increasing your dose?
Also, is there a particular cod liver oil/omega 3 tablet/liquid that you are taking that is high in DHA?