Onymyrrhe Nail Fortifier seems to be an effective product for natural nail growth, according to The Classical Guitar Store. It works by improving the growth and strength of the nails.
The primary ingredient used in this product is myrrh, which is a plant extract. Originally, myrrh was imported from Africa to help strengthen horse hooves. Daily applications of Onymyrrhe Nail Fortifier to the nail matrix help the nails grow twice as thick and twice as fast, according to The Classical Guitar Store. It can take a few weeks to begin noticing results, but the 0.50-ounce bottle lasts for 2 years.