Vitamin C can be taken with iodoral because iodoral is absorbed deep into the intestines. Vitamin C should not e taken with Lugols. The 2 most popular forms of Vitamin C are Ascorbate recommended by leaders here and Ester C is recommended by some others.
I have done research on the Pros & Cons of each type of Vitamin C and the report is here: http://tinyurl.com/Iodine-Supplements
There are definite advantages & disadvantages to each type of Vitamin C as you will see in the above link.