Sally Hansen Nailgrowth Miracle Serum is a concentrated Peptide serum formula, infused with Keratin. It supports natural nail growth. Nails become resistant to damage, while cuticles are softer and smoother. You'll be amazed at the results - visibly longer, fortified nails and flawless-looking cuticles. How to use: Apply daily. Massage 1 drop on each nail and cuticle. Use on bare nails or over any nail colour. This Growth Treatment Growth Serum is infused with Keratin, for up to 59% Longer Nails. America's #1 Nail Brand. Salon Tested. Our Breakthrough serum, infused with Keratin, designed to support natural nail growth and perfect your cuticles. Our concentrated Peptide serum formula, infused with Keratin, supports natural nail growth. Nails become resistant to damage, while cuticles are softer and smoother. Visibly longer, fortified nails and flawless-looking cuticles. Guaranteed results in just 2 weeks.*Based on a fixed point nailed measurement in 2 weeks.