Hi, Thanks for asking. Based on your query, my opinion is as follows. 1. Take on a weekly basis. Avoid taking excess, excess Vit D is toxic. 2. I am not sure about Vit D bought online. It might not be the said dose. Try to increase in diet with fish oil and egg yolk. Exposure to sunlight is also very important. 3. Take the granules one again every week. Repeat test after two months. Hope it helps. Any further queries, happy to help again.