Yes iodine works GREAT to eliminate dandruff for 3 months at time. Just mix 4 drops of Lugols 5% into 1 ounce of water and apply to your scalp, then towell dry. Difficult areas may need to be treated for 2 or 3 days. The dandruff vanishes on contact.
The same iodine-water mix will eliminate thrush - white tongue as a gargle & swish around the mouth,
I cured my prostate problems with 50mg iodoral iodine capsules.
Notice that most of those diseases are also on the list of Candida diseases. http://foodmatters.tv/articles-1/how-to-overcome-candida-naturally
Candida is an opportunistic disease that flourishes when the immune system is in shambles. Iodine, good diet & Vitamin D3 cure the immune system.