This is something that I’ve found really works especially in combination with other prescriptions medication if needed for thinning hair. If it’s a severe problem I’ll use both prescription medications and Healthy Happy Hair. For those with mild thinning Happy Healthy Hair should be enough by itself. It has a high dose of Biotin, Vitamin A, Zinc, Copper, Inositol, Horsetail, Saw Palmetto, and the main ingredient that I think sets it apart is called AnuGain (very good for hair growth). 

Ingredients:
Vitamin A 630 mcg; Biotin (as D-Biotin) 10000 mcg:
Zinc 20mg; Copper 2mg; Inositol 50mg; Horsetail 7% Silica
30mg; Saw Palmetto Fruit Extract 100mg;
AnaGain Nu 100mg