Nails Inc Nail Kale Superfood Oil Capsules Give your nails and cuticles an active dose of nourishing nutrients. Each one time use capsule is enriched with jojoba oil, vitamin f and celery extract to protect, strengthen and maintain nail and cuticle health. Directions of use: twist the tab and burst the bio-degradable capsule to reveal the perfect amount of serum for one use over your cuticles, nails and hands. Gently massage in.