Hi. I have heard quite a bit about this expensive hair growth pill. Have any of you use it? If so, please give details. I want my hair to grow by a certain lenght by the end of summer. Is Viviscal worth the price or should I stick to the Vitamin Shoppe's hair, skin and nails formula ? I am not interested in using MSM because the side affects are not worth it for me. Any thoughts, suggestions or comments will be appreciated. Thanks!