Those of you with sensitive skin and/or scalps may find this of interest.  My skin is highly sensitive, and I have fought scalp flakes all my adult life.  Also, almost every type of commercial conditioner I have ever used has caused my neck to break out where my hair touches!  My dermatologist prescribed a HIGH PRICED concoction for scalp, which was no improvement.
The lady at my health food store suggested a sensitivity to sodium laureth sulfate, laureyl sulfate (sp?) and propolene glycol (antifreeze), major ingredients in most shampoos & conditioners. She had me try shampoo & conditioner from Avalon Organic Botanicals, and after two months, I can report success.  They do not contain any of the above detergents or additives. Also, they smell WONDERFUL. I would not recommend these to you fine ladies unless I had given them a thorough test-drive.  Found in health stores or they have a site:
www.avalonnaturalproducts.com
Hope this helps someone else like me!