See the difference custom can make.
fresh, made-to-order haircare
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
Cruelty-Free
Sulfate-Free
We Take Your Beauty Personally
At Function, we believe you deserve a product tailor made for your unique needs, goals, and preferences.
Start with the quiz to create your custom formulas, crafted with a precise ratio of ingredients and your choice of scent, color, and packaging.
With years of data, expert research, and listening to our customers, our personalized formulas and routines just keep getting smarter and more effective, providing you with instant results you’ll love.
How It Works
Your Hair Meets Our Science
1
Take the Quiz
Tell us about your hair texture and structure, your scalp, and all of your hair goals.
Haircare as Unique as You
of sammy
Wavy Hair
Medium
Dry
Beet Root Extract
Prevents split ends, improves elasticity, moisturizes, and protects hair.
Cactus Extract
Fights free radicals and protects the hair from thermal heat damage.
Quinoa Protein
Strengthens, provides brilliant shine, and improves manageability.
Discover Our Products
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
30-day Healthy Hair Guarantee
Personal + Proven Results
(73,031)
This stuff is UNREAL! After just ONE use my hair felt better than it has in years.
Sydney
Award-Winning Beauty
Best Custom Gel Moisturizer
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