Hair, Skin and Nails Support. Provides 500 mg Per Capsule. This herbal supplement delivers key nutrients for skin, hair, and nails, and helps to thicken and strengthen hair and nails, while also supporting bone health. Swanson has been providing science-backed quality since 1969. For those looking to maintain their beautiful hair, skin and nails without toxic chemicals found in modern hair care, skin care and cosmetics, horsetail herb is an excellent option. This popular botanical delivers essential nutrition for healthy hair, skin and nails in a dietary supplement.