Well, these days there are some effective treatment methods when it comes to hair loss...but I'm yet to study or use an "all-in-one" pill, cream, or other form of medication that delivers what is promised. There may be some that provide very limited results...but nothing near what most people expect when they take a "hair restoration" supplement.
That being said, Saw Palmetto has shown in double blind, placebo controlled studies that it can be effective in reducing hair loss and regrowing hair. I've used this in combination with Avodart for some great results.