I’m a Cosmetologist, I’ve got GD, and had RAI nearly 5 years ago, I’ve never experienced “troll” hair myself, but I do lose more then the average amount with each shampoo, fortunately my hair is thick so it’s never been a problem. For those that are having “bad” hair days, You don’t have to spend a fortune at the salon when there are drug store products that do the job just as well. For people with dry scalp, there’s a great product called Kolstral,( pronounced like cholesterol ) It’s a very good treatment, and works quite well,it’s also very affordable. I would suggest scalp manipulations along with the treatment, This well stimulate the circulation of blood to the scalp,relax and soothe the nerves, stimulate the muscles and activity of scalp glands, which all help to maintain the growth and health of the hair. I would also recommend avoiding shampoo with a strong soap base,preparations containing a mineral oil or sulfonated oil base,and any product with a high alcohol content. There are great affordable products, which do a very good job, check it out! Shannon.