Strengthening Shampoo
Keratin Repair Shampoo
Nourishing Shampoo
SCIENTIFICALLY PROVEN, BACKED BY DATA
2x stronger hair 90% less breakage
*complete SOS system vs untreated hair, instant and 4 weeks results
Results on wavy, highlighted hair
“This SOS Custom Repair saved my strands! My hair feels so much healthier, my frizz is under control and spilt ends are banished. I can’t stop touching my soft hair.” - Jessica
Results on curly, highlighted hair
“My hair walks into a room before I do, so I’m looking for ways to take care of it. With SOS Custom Repair I know my curls will stay hydrated and frizz-free even if I sneak in a few heat styling moments throughout the week.” - Brenda
Results on highlighted, straight hair
“My hair feels so soft, nourished and hydrated after using SOS Custom Repair. The Leave-In Treatment is my go-to every time I wash my hair.” -Yoko
Results on colored, coily hair
“I love experimenting with my hair color which means I need to prioritize hair health to prevent breakage. SOS Custom Repair is my secret weapon to keeping my coils healthy while I keep being me.” -Keturah
How it works
Two Steps to Custom Haircare
1. You take a quick, two-minute quiz about your hair history, goals, damage and styling habits.
2. We formulate made-to-order, tailored haircare, prioritizing naturally-derived ingredients, and ship it to you.
Choose Your Hair Care Routine
Clean. Vegan. Cruelty-Free.
The Function Standard
With Function of Beauty, you are guaranteed a highly efficacious formula with no compromises. Always clean, vegan, and cruelty-free, our formulas focus on naturally-derived ingredients and powerful science to meet high efficacy and testing standards.
Browse by Category
Still Unsure?
Don’t stress. We've paved our quiz like a yellow brick road. Just a two-minute detour from your day, and spoiler: there's no Wicked Witch at the end, just perfect hair days.