Bad reaction to l-Citrulline, Dr. Jeff

Dr. Jeff,

I ordered this product, l-citrulline, per your suggestion to help with the hives and had a terrible hive reaction to taking it. It contains magnesium oxide and after taking it I remembered that I had the same reaction to taking plain magnesium oxide (both by NOW) before.

http://www.iherb.com/ProductDetails.aspx?pid=6688


Do you think that is what I am reacting adversely to? Could it be that the nitric acid is killing the candida giving me hives? I also have leaky gut and parasites.

Thank you for your advice.

SOH