ISDIN Si-Nails Nail Strengthener

ISDIN Si-Nail Strengthener is an innovative nail growth treatment, clinically proven to strengthen brittle nails by increasing their thickness, density, and durability. In just 14 days, you’ll notice visible improvements in nail strength and overall quality. After 28 days, 97% of users reported harder, faster-growing nails. This nail polish-friendly formula is fragrance-free, and free from toluene and formaldehyde, making it safe for regular use.

Key ingredients include Silanediol Salicylate, which promotes silicon, a key mineral for nail health, and Pistacia Lentiscus Gum, which encourages keratin production—essential for strong, healthy nails. Additionally, the inclusion of Cationic Hyaluronic Acid enhances cuticle moisture and repairs brittle nails, reducing roughness and boosting overall nail durability.