See the difference custom can make.

Made-to-order, performance 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

 

Paraben-Free

 

100% Vegan

 

Dermatologist Tested

 

Cruelty-Free

 

Sulfate-Free

 

Paraben-Free

 

100% Vegan

 

Dermatologist Tested

 

Cruelty-Free

 

Sulfate-Free

 

Paraben-Free

 

100% Vegan

 

Dermatologist Tested

new in

Purple Treatments for Everyone

Discover the newest additions to our Purple Collection, just in time to tone summer brass.

Custom Haircare as Unique as You

At Function, we believe you deserve products that are tailor-made for your unique hair type, needs, goals, and preferences.

Start with our quiz to create your fully custom formulas, crafted with high-performance, precisely-dose ingredients to match your unique hair needs. Choose your goals, fragrance, and colors.

With years of data, each formula evolves with your changing needs to deliver instant results you will love.

How It Works

Your Hair Meets Our Science

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1

Take the Quiz

Tell us about your hair texture and structure, your scalp, and all of your hair goals.

How We Function

We carefully review every ingredient for safety and performance. Our formulas are science-based and vegan, prioritizing naturally-derived ingredients in optimized dosages based on your hair’s needs. We are cruelty-free, and free of sulfates, parabens, and formaldehyde donors.

All our products undergo a rigorous testing process under dermatological control as well as with stylists. Each step of our formulation and production process in our labs and factories follows stringent quality control protocols.

Haircare as Unique as You

of sammy

Wavy Hair

Medium

Dry

Beet Root Extract

Helps prevent split ends, improves elasticity and moisturizes.

Cactus Extract

Fights free radicals and protects the hair from thermal heat damage.

Quinoa Protein

Strengthens, provides brilliant shine, and improves manageability.

30-day Healthy Hair Guarantee

 

Subscribe Risk-Free

 

30-day Healthy Hair Guarantee

 

Subscribe Risk-Free

 

30-day Healthy Hair Guarantee

 

Subscribe Risk-Free

 

30-day Healthy Hair Guarantee

 

Subscribe Risk-Free

 

30-day Healthy Hair Guarantee

 

Subscribe Risk-Free

Personal + Proven Results

(73,031)

This stuff is UNREAL! After just ONE use my hair felt better than it has in years.

Sydney

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