This is a Shampoo that I have found to help with fine hair, they also offer a whole series of steps, as well.
Here is their product description from Amazon for Cleanser #1:
"Nioxin Cleanser is a detoxifying cleanser for fine, thin, non-chemically treated hair formulated with a concentrated blend of botanicals and humectants, this cleanser removes product build up, minerals, pollutants and toxins, clears nutrient pathways at hair follicle sites without stripping essential oils, and provides an optimum scalp environment. Bionutrient Actives Cleanser leaves hair growing healthily with body, volume and shine."
This is the product description for Cleanser #2:
"A daily volumizing cleanser that gently removes residue and DHT from the hair and scalp to promote a healthy scalp environment. It also provides nourishing vitamins, proteins and amino acids."
I have been using #1 and #2 Cleansers and Conditioners for over a year now and I must say that I like how it has helped my hair. If you suffer from thin, or even very fine hair, you may want to try something like this too.
In addition to using the Nioxin, I do try to take these supplements regularly and occasionally apply argan oil to my ends.
I have not used the entire multi-step Nioxin system, but I can attest to their cleanser and conditioners, I think they are great, and will continue using them. I know how frustrating fine hair can be and wanted to offer this post to someone experiencing a similar situation, in hopes that you benefit from it as well.