Isabella,
The formula the you mention is a very good product.
Always try to take a good multi-vitamin a day, if you notice most of the hair products contain a combination of B-complex, which you also get from your multi.
Horsetail or (Silica) is an excellent product to strengthen the hair and skin.
You also need your Essential Fatty Acid, such as Evening Primrose, Flax seed, Olive Oil, etc...
And Biotin.