Reply To: I recently found out that I have low Vitamin D (26) and have tried to take 5000 IU of Vitamin D and 2000 IU of Vitmanin D. After take big the supplements (each for 2 days ) and three weeks apart, my skin began to itch and I started to have a burning sensation. I meet with primary this week to discuss it. If I am having an allergic reaction to the Vitamin D what is the best way to get the necessary amount. I should not I live in the Pacific Northwest. I have been experimenting muscle pain and some spasms so would like to begin to raise the levels as soon as possible. Thanks for any suggestions.