A leave-in formula clinically shown to quickly repair damage and protect hair from future harm with a hair-identical protein.

Packed with the highest percentage of Virtue's hair-identical protein, Alpha Keratin 60ku®, this serum quickly repairs severed bonds that give hair its strength, restores damaged peptides to give hair elasticity, and refills each strand with keratin to smooth, soften, and protect from future harm.

Why We Love It:

• Reverses damage from cuticle to core
• Restores hair elasticity and fiber flexibility
• Strengthens by refilling lost keratin