free returns


made in usa


paraben free

sulfate free

who we are+

What makes Function of Beauty different?

Historically, beauty companies have told you what you need for your hair. We know that you know your hair better than anyone else does.

Our founding team—world-class MIT engineers and data scientists—spent years building our own algorithm and machines, that pull from hundreds of ingredients to potentially create billions of completely unique shampoo and conditioner combinations.

Tell us what you want and need for your hair, and we’ll individually formulate and fill a product that is as unique as you!

Read more about what makes us different here.


Will the colors of the products affect or tint my hair color?

Absolutely not! We use FDA-approved dyes at levels that are unable to affect natural or dyed hair color.

Do you offer a completely fragrance-free option?

Yes, we do! Since there is no fragrance added, all you will smell are the natural scents of the components of your shampoo and conditioner.

It’s a pretty neutral scent, but some people may not enjoy it. If you’re looking for an all-natural fragrance, we recommend All (You)calyptus, which is made from a blend of essential oils.

Do you test your products on animals?

Never! Our products are cruelty-free—we will never test on animals. They are also 100% vegan, and do not contain any ingredients made or derived from animals. Function of Beauty is a part of PETA's Beauty Without Bunnies program, which certifies that products are both cruelty-free and vegan!

Do your products contain parabens and sulfates?

Our products are paraben-free, as well as sulfate-free (including SLS/SLES). If you have any further questions about specific ingredients, you can find more information here.

Do your products contain silicones?

Yes, our products do contain silicones. We believe in only using ingredients that we feel comfortable using ourselves. This means using ingredients that are safe and effective, and ideally, natural. In our opinion, silicones are one of the most effective ingredients in haircare—there is nothing better at protecting hair against porosity and resulting damage, and no natural ingredients are able to replicate this effect (or we’d use them!). We predominantly use water-soluble silicones because they don’t cause product build-up and won’t weigh down your hair.

Are your products safe for keratin-treated hair?

Yes, our products are safe for keratin-treated hair! Since they are sulfate-free, they won’t be as harsh as traditional shampoos can be.

Our customers with keratin-treated hair are able to use Function of Beauty products successfully, and many of them add Strengthen as a hair goal. The vegetable proteins in that hair blend can help your keratin-treatment last longer and perform optimally.

Are your products gluten-free?

While it is possible to create a completely gluten-free Function of Beauty formulation, there are a few hair goals that do have gluten-containing ingredients. They are: anti-frizz, curl definition, fix split ends, straighten, strengthen, and volumize.

If you need some assistance figuring out how to avoid gluten and still achieve your hair goals, please reach out to us at and we’d be happy to help!

Are your products safe for use during pregnancy?

Firstly, congratulations on your upcoming arrival! The safety of our products is our top priority and we’ve spent a lot of time formulating them to be as safe and gentle as possible. If you have specific concerns, you should check with your obstetrician.

Some expectant mothers suggest avoiding essential oil blends, as some are thought to reduce milk supply. If this is a concern of yours, we recommend avoiding the All (You)calyptus fragrance.

Are your products safe for use on children?

We specifically formulate our products to be as safe and gentle as possible, but children may be more sensitive to certain ingredients than adults are or may have unknown allergies. We recommend consulting a physician prior to use.

What if I’m allergic to (xyz)..?

If there are certain ingredients that you are allergic to, or wary of, you can feel free to reach out to us at

What is your stance on controversial ingredients?

Your safety and well-being are always our top priority. Our formulations avoid potentially harmful or toxic ingredients such as sulfates (including SLS & SLES), parabens, phthalates, triclosan, mineral oils, formaldehyde, GMOs, & many others (please see below for a more detailed list). We do not formulate with ingredients banned in the EU.

Acetates Acrylic Acid
Aluminum Animal Fats, Oils & Musks
Benzalkonium Chloride Boric Acid
Butylated Hydroxytoluene Coal Tar
Diazolidinyl Urea Diethanolamine (DEA)
Hydroquinone Hydroxyethyl Acrylate
Imidazolidinyl Urea Lanolin
Methanol Methylmethacrylate
Mineral Oil Nonoxynol
Oxybenzone Paraffins
Petroleum Phenol
Propyl Acetate Retinyl Palmitate and Retinol
Sulfates Talc
Toluene Triclosan
Triphenyl Phosphate P-Phenylenediamine


How much does the product cost?

(All prices are charged in US Dollars for the US and Canada, British Pounds in Great Britain, and Australian Dollars in Australia)

8oz. (236 mL) shampoo + conditioner $36/£29/A$59
16 oz. shampoo + conditioner $49/£39/A$79
Mixed sets (8oz. (236 mL)+16oz. (473 mL)) $43/£34/A$69
One 16 oz. (473 mL) bottle (of shampoo or conditioner) $36/£29/A$59

Do all orders come with pumps?

All orders come with pumps! They are at the bottom of the box, under your shampoo and conditioner.

What is the size of the bottles?

The 8 oz./236 mL bottles are approximately 5.5” high and have a 2” diameter.
The 16 oz./473 mL bottles are approximately 6.5” high and have a 2.75” diameter.

Why aren’t my bottles filled all the way to the top?

The bottles provide an extra ounce of room at the top to accommodate for pressure and room to insert the pumps. They are filled by weight and will contain 8 oz. (236 mL) or 16 oz. (473 mL) of product.

How long will a set last?

It’s dependent on your hair length, how frequently you wash your hair, scalp moisture level, and many other details. On average though, if you’re washing daily, an 8 oz. (236 mL) set should last up to 60 days and a 16 oz. (473 mL) set up to 120 days.

What is the shelf-life of my formula?

Under normal use conditions, your shampoo and conditioner should be safe to use for at least 2 years.

Do Function of Beauty products work for all ethnicities?

We cater to all textures of hair, from straight to wavy, to curly and coily! We always formulate without sulfates and parabens and use a multitude of natural and effective ingredients to ensure that customers of all ethnicities and hair types create a formula that fits their unique hair needs!

What are your bottles made of?

They are made of 100% recyclable, PETE-grade plastic.

Are the bottles colored?

The bottles are transparent, and the actual product is colored!

Why do the colors of my formula look different from someone else’s?

Because, like you, your formula is 100% original. The colors of each set can change, based on your hair profile and the hair goals you select. Given the natural ingredients that we used can have slight variations in color, the finished products will also have slight variations in color.

Do you offer samples?

We are unable to offer samples, since every bottle is made specifically for each customer. The smallest size of a personalized formula that we can produce is 8 oz.

Where are Function of Beauty products made?

We’ve invested millions in our state-of-the-art manufacturing facilities, which allows us to have oversight through every step of the process. Every single set is manufactured and made in the USA

order and payment+

How can I adjust my formulation?

If you’ve just placed an order, please reach out to us at as soon as possible with the changes that you would like to make. We can make adjustments to your formulation at any time before our chemists start working on it.

If you are re-ordering, you can adjust your formulation from your account page. Select the “Re-Order” option. From there you’ll be taken to the hair quiz, where you can change the answers to your hair profile, the hair goals and/or the colors and fragrance.

To adjust your formulation for subscriptions, there is an “Edit Formulation” button under the Manage Subscriptions section of your account page.

Can I send back bottles to be re-filled/recycled?

At this time, we don't have a formal recycling program. Through our research, we’ve found that mailing your bottles back to us actually leaves a larger carbon footprint than if you were able to just recycle them at home. We do really appreciate your desire to cut down on waste.

Can I use special characters on my bottles?

We’re not able to print special characters on the bottles at this time.

Can I purchase more than one set at a time?

At this time, we’re unable to create and package multiple sets for the same order. Once you have placed one order, it should be simple to go through and place another, as we securely save your details in your account.

When will my credit card be charged?

Your credit card will be charged immediately upon making an order.

When can I expect my order? (U.S.)

It takes us 5 to 7 days for our chemists to formulate and fill your order. From there, we offer USPS priority two-day shipping (free for subscriptions!). We’ll also send you a notification when your order has been shipped, with a unique tracking link.

How can I re-order my formula?

On your account page, select the “Re-Order” button next to the order that you would like to modify. You will be taken through the hair quiz, where you can make adjustments (or leave as is).

What if I’m not happy with my customized set? What is your return policy?

It rarely happens (less than 1% of all orders), but if you are not completely satisfied with your personalized formula we will happily offer a refund. Read more about our Happy Hair Guarantee here.

How long do refunds take to process?

Refunds can take 7-10 days to reflect on your original form of payment.

Do you accept PayPal?

We do! However, we only are able to accept PayPal for one-time purchases—it cannot currently be used for subscription payments.

What forms of payment do you accept?

In addition to Paypal, we accept all major credit cards.

Are there coupons or sales?

While we do not offer coupons or sales, we do offer free shipping on subscription orders.

How can I cancel my order?

If you need to cancel an order that you just placed, please contact as soon as possible. Once your order has been filled, we will be unable to cancel it.

hair quiz+

How do I select my hair type?

We define the different categories of hair type as:

Straight Hair strands tend to not have a bend or a curl.
WavySomewhere between straight and curly. Hair Type 2. 
CurlyDefinite curl pattern, S-shaped or loopy. Can be prone to frizz. Hair Type 3. 
CoilySometimes wiry, zig-zag pattern, tighter curls than curly hair. Sometimes known as kinky hair. Hair Type 4.

How do I select my hair structure?

Hair structure doesn’t refer to the volume of hair you have, but the thickness of an individual strand of your hair.

Fine A single strand is thinner than a sewing thread. If you take a strand of hair between your fingers you don't feel anything. 
Medium A single strand is about the thickness of a sewing thread. If you take a strand of hair between your fingers you can feel the hair. 
Coarse A single strand is thicker than a sewing thread. If you take a strand of hair between your fingers you can feel a strong thick strand. 

How do I select my scalp moisture?

This is the level of moisture/oil on your scalp.

Dry Your scalp might be dry or flaky. You typically wash every 3-4 days.
Normal Your scalp is about the same a day after you wash it.
Oily You feel the need to wash your hair daily.

What if I’m not sure what hair goals will best fit my hair?

If you’re not sure what hair goals will best fit your hair, you can contact us at We’d be happy to walk you through selecting the best goals for your hair.

What are the fragrances like?

Fragrances can definitely be subjective, but we like to think we have something for everyone!

Peony Tail an infusion of wild peonies and warm musk; soulful, soft floral fragrance
Feeling (F)ineapple a blend of pineapple an coconut create an uplifting, tropical fragrance
All (You)Calyptus a mix of eucalyptus, lavender, tea tree, rosemary, peppermint, and spearmint oils offers a tingly fresh, energizing scent
Hibis(Kiss) sweet bubblegum and fresh linens; sweet and youthful fragrance
Musk-Have cedar wood and violet provide a sophisticated masculine fragrance

For (Shore) vibrant mandarin and sea salt mingle with coconut to create a scent reminiscent of being sun-kissed and salty-haired at the beach. (limited edition)


How do I redeem my e-giftcard?

Redeeming your gift card is as easy as clicking on the link in your e-mail. Once the gift card has been redeemed, the credit transfers to your account. From there you can take the hair quiz and check out using your credits.

How do I order a set with my gift card?

Your gift code can be found on the back of the green card included in your gift box. You can input your gift code by going to From there you’re able to create an account and take the hair quiz and check out using the credit in your account.


Do you ship worldwide?

At the moment, we ship to the United States (including Puerto Rico and the Virgin Islands), Canada, Australia and Great Britain (England, Scotland, and Wales).

How much does shipping cost?

Shipping for single orders costs $5 (USD/AUD) in the US & Canada/Australia, and £5 in Great Britain, though if you order a subscription, shipping is always free!

When will my order ship?

Each customized order takes 5-7 business days from the time the order is placed, to be formulated, filled and processed for shipping.

Why can’t I track my order?

Once your order has left our production facilities, you will receive an email with the tracking information included. If you are unable to track your order with the provided tracking number, please reach out to us.

How can I change my shipping address?

If you would like to change your shipping address on a new order, please email us at as soon as possible so we can update it for you. For re-orders and subscriptions, you can change your shipping address from the account page.


How do I change my password?

From your account page, click on “Settings”, located on the menu bar. Expand the “Update Password” section, enter your old password and your new password, and then click “Submit”.

How do I update my email address?

From your account page, click on “Settings”, located on the menu bar. Expand the “Personal Info” section, where you can update the spelling of your name, change your email address and phone number, as well as add your birthday. Make sure to click “Update” so that your changes save!

Where can I find my referral link?

Your referral link can be found at the top of your account page, in the “Give $5, Get $5 Credit” section.

How can I change my shipping address?

If you would like to change your shipping address on an order you just placed, please email us at For re-orders and subscriptions, you adjust it on your account page.


How does the subscription plan work?

With a subscription plan, you can personalize your formula along with the delivery frequency (every month, every 2 months, or every 3 months).

A few days before your subscription order is set to be filled, you will receive a reminder that your subscription is about to be filled. You will have the chance to adjust your formula, change your delivery date, billing information, and edit your subscription. However, you can make these adjustments from your account page at any time. Once your order has been filled, we are unable to modify, or cancel it for you.

When am I charged for my subscription?

You will be charged for your subscription when we start working on your new order, about 10 days before your order is supposed to ship to you. You will get a reminder email beforehand.

How can I modify my subscription plan?

You can modify your subscription plan from your account page. Under “Manage Subscription” you have the option to edit your formulation, edit the sizes of your bottles and frequency of shipments, adjust your billing information and your shipping address.

Can I turn my single order into a subscription?

From your account page, select the “Subscribe and Save” button next to the order that you would like to modify. You will be taken through the hair quiz, where you can make any adjustments necessary. Be sure to adjust the shipment frequency. Once you make your payment, you have an active subscription!

How can I cancel my subscription plan?

Under the Manage Subscription section of your account page, there’s an option to “Cancel Subscription”.


How much does shipping cost?

Canada - Shipping for single orders costs $5, though if you order a subscription, shipping is always free!
Great Britain - Shipping for single orders costs £5, though if you order a subscription, shipping is always free!
Australia - Shipping for single orders costs A$5, though if you order a subscription, shipping is always free!

When can I expect my order?

All orders take 5-7 days to be formulated and filled, due to the customization of each formula. Your order confirmation will include our best estimate of your package’s arrival date, as the priority 2-day shipping counts from your package’s arrival in your country. Once your order has been filled and shipped, you will receive a notification with a unique tracking link.

Country Processing Customs Local Carrier
Australia 7-9 days 1-2 days 2 days
Canada 2-4 days 1-3 days 1-2 (up to 4 in rural areas)
Great Britain 3-5 days 1-3 days 1-2 days

A third-party shipper brings your packages to your country border—it’s likely that during this time your tracking information won’t be updated. Once your package clears customs (a process that is usually pretty quick but can take a bit longer than expected every once in a while), it will be assigned a new tracking number.

Will I have to pay VAT/duties? (Great Britain)

The price at checkout that you are quoted, and pay, has VAT included.

Will I have to pay GST/duties? (Australia)

The price at checkout that you are quoted, and pay, has GST included.


Do you sell wholesale/partner with salons?

We appreciate your interest in bringing Function of Beauty to new customers. However, we currently only sell via at this time and do not wholesale or partner with salons.

How can I visit the lab in NYC?

We’re thrilled you’re interested in visiting our lab in NYC! We open up appointments on Wednesday at noon for the following Saturday and Sunday. Feel free to make an appointment here or email us at

Where can I find information about jobs at Function of Beauty?

We do post jobs periodically, but you can always reach out to with your resume and relevant information, and we’ll contact you if you’re a fit for anything we have open.