Nioxin Smoother Silk Elixir Leave In is good. I formerly used it as my official leave-in conditioner for about 2 months straight. This product does give strength and moisture to the hair.
Faithful user here! Try the Nioxin Protectives Starter Kit (because Nioxin is expensive). It has the cleanser, conditioner, and a leave in called Scalp Therapy. I used this when I had excessive shedding and it worked great! You can buy it at any Trade Secret store, or any salon products store in the mall. Here's an example: http://www.salonlines.co.uk/forwomen/index.php?p=1&category_id=164&product_id=536