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

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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.

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

@theskinjournals

Award-Winning Beauty

Best Custom 
Gel Moisturizer

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