Hi I started taking D3 1,000 IU every day since 4th February. On 11th April I had my VIt D level checked and it was 60 nmol/l. Is it possible to estimate what my level may have been on 4th February based on the amount I have been taking. (UK – indoor based, very little sunlight, av of 1 portion of oily fish and 1 egg per week) I think I need to continue to take this dose do you agree? I have had health problems for years and never had a vit d test previously, I have a mother with osteo arthritis (severe since age of 40) plus a 7 year old child diagosed with T1 diabetes 2 years ago. I think I must have been very deficient of vit d during pregnancy (she was born mid June). I was taking a low level of vit d with pregnancy vitamins at the time, but I think if I was very deficient these vitamins would have been insufficient to prevent my daughter's risk of T1. Please advise. Thank you.