Dr Kumar gives the following suggestion:
I buy iodine from Magnascent. The link is http://www.magnascent.com/
I use 1% nascent iodine internally for cancer patients and 2% nascent iodine as local paint twice a week for breast cancer patients. Works wonderfully and got very good results in Inflammatory breast cancer. I use 10 drops in 100 ml of water three times a day.
For external use like breast cancers, apply as paint over the skin at night and wash off next morning while having bath.(Twice a week)