Few years ago my aunt who was then in her 50s was suffering from diffuse hair loss (Chronic Telogen Effluvium). It involves an increased rate of hair fall and subsequent thinning from all over the scalp.There are a number of reasons that diffuse hair loss may occur, including a lack of certain nutrients, stress, or as a side effect of illnesses such as anemia and thyroid conditions. A specialist suggested her the following remedy.Apply a tsp of Iodine, diluted in sesame oil, all over the scalp,leave overnight and wash.This worked like a charm and 6 months later she had a head full of hair.This remedy also works in treating alopecia. I read a similar remedy from a book “Grow hair fast” written by a famous Tricohologist which calls for applying a mixture of white iodine and castor oil in equal amounts. In the "Beauty Secrets of India" book by Monisha Bharadwaj the author’s Grandmother sure shot recipe for hair fall was to apply to the scalp on alternate days for 4 days a tiny amount of castor oil and iodine.