Herbs by the ounce Herbs by the ounce . . . . . . . . . . . . Good for weak hair and nails. Shavegrass is very high in silica. It is thought to aid the immune system and the nervous system because of its silica content.
Hair needs silica to grow and as a protection for the skin and cell walls.
The silica in shavegrass helps the absorption of calcium by the body.