Function of Beauty Hair Review

About Function of Beauty

Function of Beauty Hair Review

Finding the right hair and skin care products has been an interesting journey. From cheap formulas to natural “solutions”, I’ve wasted a lot of money on products that don’t pull their weight. But why would they? They weren’t made for me.

Function of Beauty is a leader in customizable hair and body care for men and women. From the first ingredient to the last squirt and on to shipping, the product really is made for “you (and only you).”

As I shuffled through the 4-step quiz, I really felt at the center of my customization process. It was up to me what goes into my formula and what I want it to help with. I grew excited that a product was being made just for me—but I’m not the only one.

Function has a whopping 816k followers on Instagram, 73k 5-star reviews, and as has been featured in popular publications like Forbes and Insider. It’s obvious the brand has made it in the haircare world.

Ready to dive into its custom formulas? Before I unscrew the cap of this Function of Beauty review, check out the brand’s highlights to get a feel for what it’s all about.


  • High level of customization[1]
  • Wide range of colors, ingredients & fragrances
  • Free of sulfates & parabens
  • Vegan & cruelty-free[2] 
  • Dermatologist tested
  • Deals & discounts
  • 73k 5-star ratings and happy customers
  • Free shipping
  • Happy Hair Guarantee

What’s coming up in this Function of Beauty hair review? Ahead, I’ll take you through an in-depth look at the brand, its bestsellers, customer ratings, promotions, and more to help you decide if their products are worth the buy. 

Overview of Function of Beauty 

Function of Beauty Hair Review

Function of Beauty was created in 2015 by a serious power trio—an engineer, a navy vet, and a chemist—and is headquartered in New York. Impressive to say the least, but I wondered how that translates to customer personal care. Turns out, very well, through a list of values they don’t compromise on.

Advocates for change and doing things differently, Josh, Zahir, and Hien let their imaginations run wild and launched the brand in 2015, spearheading the custom hair and body care movement by designing the first ever facility that could handle literally trillions of possibilities.

Based in Pennsylvania, I value that all of its products are custom filled in the USA, and am in awe of the seemingly endless number of formulas its factory can handle. Function of Beauty wants to carve their own path, to break the rules, to take risks and to envision a new normal to offer the very best in hair and body care, and I think they’ve certainly done that.

With individual preferences, hair and skin types, moods, styles, and passions, I believe our individuality is worth designing products for, and Function supports this right. Every person’s hair and skin have different needs, and the products they use should be unique to their texture and composition.

Your skin requires the perfect ecology to keep it at its healthiest, I read in this study[3]. Similarly, the hair is also a site of diverse organisms that play an important role in immune function, so hair and skincare are far deeper than just physical. 

No two people have an alike formula (and if so, it’s very rare), so Function is like the snowflake of brands—every product is different[4]. How do you find your perfect formula? The core staple is the Function of Beauty hair quiz which allows you to formulate and customize your own haircare solution. I’ll get into that next.

Function of Beauty Custom Haircare Quiz Review

I took a tour of the Haircare & Hair Quiz to get a sense of how things work for this Function of Beauty hair review.

Verdict? It’s simple and fun! You know yourself best, so filling in the details of the locks you brush and wash should be a breeze. First, you’ll identify whether your hair is straight, wavy, curly, or coily.

Function of beauty hair quiz review

Next, the team gets into assessing your hair structure, and you describe your tresses as fine, medium, or course. After that, you clarify the moisture level between dry, normal, and oily.

Then it gets a bit more detailed. You can select up to 5 hair goals, with a minimum of one.

Function of beauty hair quiz review

Believe me, your finger will be clicking on that mouse pad when you see the goals you can choose:

  1. Deep condition
  2. Fix split ends
  3. Hydrate
  4. Replenish hair
  5. Strengthen 
  6. Anti-ageing
  7. Color protection
  8. Lengthen
  9. Thermal protection
  10. Volumize
  11. Anti-frizz
  12. Curl definition
  13. Nourish roots
  14. Shine
  15. Soothe scalp
  16. Straighten
  17. Oil Control
  18. Reduce brassiness

I clicked on everything to do with damage repair and moisture and went on my way. I personally like that you can select a silicone-free formula for your shampoo and conditioner if you like, though if you’re ok with silicones, they apparently give the products a little more slip.

Silicone, which is explored in this study[5], is not water-soluble and can remain on your hair and lead to it becoming dull and drier. However, it can also protect the hair shaft from abrasive damage and increase the body of your hair. It’s a catch 22, but totally up to you.

After a short mental debate about silicone, you’ll get to customize your fragrance. Here’s a list of their delightful options:

Nude (p)each, Strike a (r)ose, (Pear)fection, All(you)calyptus, True l(o)vender, and Fragrance free. New scents include Floret, and takes two to (m)ango. I’m totally loving the puns here, by the way.

I love that I get to determine how strong I want the fragrance to be (light, medium, or strong) and that I could have a pleasantly subtle scent[6] if I like, as some shampoos can be quite powerful in a steamy shower.

Function of beauty hair quiz review

Finally, choose from a variety of bright colors (or none) and add the most important personal touch – your name!

Function of Beauty Hair Review 1

After you check out, I think the hardest part is waiting for your customized Function of Beauty products to arrive.

Function of Beauty offers shampoos, conditioners, leave-in shampoos, hair masks, hair serum, body wash, body lotion, and its newest addition, custom skincare. Let’s dive into the brand’s top sellers.

Function of Beauty Shampoo and Conditioner Review

First of all, I’m in love with these colors, but I appreciate that if I preferred, I don’t have to have a color at all. The Function of Beauty Shampoo & Conditioner is a bright, beautiful and bold bestseller, sold in fantastic colors like lavender, teal, and bubble gum pink.

Bringing fun and energy to shower time, these bright beauties are totally customizable to reflect your personality, needs, taste, and of course, hair goals. Me? I like sunkissed yellow paired with (m)ango scents. With colors like these, your partner certainly won’t mistake their shampoo for yours—unless they do it on purpose.

Function hair products are free of sulfates and parabens, entirely vegan, and cruelty-free. So what’s the deal with sulfates and parabens, anyway? Sulfates are a cleaning agent which essentially strips the hair of its natural oils in an effort to cleanse it of all debris. Parabens[7] are used to increase the shelf-life of the product by preventing the growth of bacteria and fungi.

Though these things sound great, they can actually over strip your hair and harm your scalp. Better that Function leaves them out.

You can also customize your purchase so that your formula is produced free of silicone, dyes, and fragrances. It really is all up to you. And what I personally loved, was that in the natural formulations there are up to 60 natural ingredients[8].

The recommended use is 1-2 pumps of Function Shampoo applied to wet hair. Massage the shampoo into a lather, rinse, and repeat if necessary.

You can tell you’re using enough Function Conditioner if you coat your strands of hair evenly from mid-shaft to the ends. Once you’ve applied the conditioner, leave it for 1-2 minutes before rinsing thoroughly. 

Function of Beauty Shampoo & Conditioner comes in two sizes: 8 oz ($30) and 16 oz ($50).

Function of Beauty Purple Shampoo Review

Purple shampoo has been a life saver for me and so many others that deal with too-yellow strands after going blonde. Function of Beauty Purple Shampoo is formulated for blonde and grey hair, and those with bleached or highlighted hair.

The deep purple pigments resolve brassy tones in blonde hair. It’s simple color science, really, but one that actually works. Though purple shampoo promises similar results across the board, this one by Function also increases shine and helps your color to last longer[9].

When it comes to using the Purple Shampoo, you should apply it to any brassy areas and let it sit for 2-3 minutes. Function of Beauty reviews indicate that you may want to apply it for longer if you’re especially brassy. Rinse all of it out and then add a Function of Beauty Conditioner to seal the deal. 

Function’s Purple Shampoo comes in two sizes: 8 oz ($30) and 16 oz ($37). 

Function of Beauty Leave-in Treatment Review

I’ve totally stressed out my hair, so products like the Function of Beauty Leave-in Treatment are the ones I usually reach for. Made to meet the hair goals you’ve set your sights on, this ultra-lightweight formulas helps smooth, hydrate, and protect your hair.

I think it’s a great sidekick for shampoo and conditioner, plus, I love that it’s a multi-use product. Function says that it can go on either wet or dry, but the best time to apply it is right after your shower. Tousle through strands for best results.

Similar to the other hair products, this one is meant to fit you and your life, so you can use it on wash days, in between washes or for a touchup on the fly. The best part? You don’t have to rinse!

It’s recommended for all hair types, so all locks are welcome. Tousle it in, and away you go! Grab a bottle for $20.

Function of Beauty Hair Mask Review

You’ve heard of a face mask but have you heard of a hair mask? Thick and intensive, the Function of Beauty Hair Mask will pique your interest, either way. So what’s in a jar?

A serious deep conditioning treatment made with Japanese sake extract, argan oil, jojoba ester oil, and a blend of natural ingredients to complement your hair goals. 

Japanese sake extract[10] is an alcohol made from rice and water and has been tested within labs and on living organisms to show that it is an anti-melanogenic ingredient[11] that encourages hair growth and repairs damage. 

Jojoba ester oil has been proven to reduce dryness, moisturize and provide strength to damaged hair. This is due to its performance as an emollient, thanks to its chemical composition as the product of transesterification of jojoba oil, as described in this study[12].

The Hair Mask is designed for in-shower use and it gives you a lift in moisture, hydration and nourishment. I consider it a ‘treat yo’self’ kind of product. Coat your hair with the mask after shampooing and conditioning.

Pro tip: Make sure you get an even application from shafts to ends. For best results, I read you should leave the mask in for the recommended time and use it once or twice per week. This Function of Beauty shower treatment is available in 7.5 oz bottles for $20.

Function of Beauty Hair Serum Review

I’ve seen a lot of great Function of Beauty hair products that can bring your mane to the next level, and the Hair Serum is the final touch. It smoothes away those flyaways, keeps pesky frizz in place, and elevates your shine.

The serum is 100% customizable too, and is a blend of argan, jojoba, and sunflower oils, along with a melange of other natural ingredients. 

The serum is proven to reduce frizz by 70%, increase shine 26x more than untreated hair, improve detangling by 75%, and thermally protect hair from damage up to 400 degrees Fahrenheit. Seriously impressive. Function of Beauty Hair Serum comes in 3 oz for $25

When it comes to use, warm a small amount of the product in your hands. Apply the serum to damp or wet hair, then distribute it evenly from mid-shafts to the ends using your fingers. Be sure to avoid the roots and don’t rinse out! Lastly, style it and enjoy.

Function of Beauty Subscription Review

Function of Beauty Hair Review

Becoming a Function Plus Member with a Function of Beauty Subscription has its perks. I’ve outlined them here to give you the full scoop:

  • You can choose your delivery schedule and get online deliveries of your personalized formulas (every month, 2, 3, or 6 months)
  • It’s easy to make changes to your formula
  • Free shipping, access to exclusive and past limited-edition colors and fragrances
  • Invitations to help test-drive new products (I’d happily be their guinea pig!)
  • Receive reminders a few days before your subscription order is set to be filled, so that you can make any updates to your formula, delivery date, or account details

Getting started with a customized subscription is as easy as taking the brand’s quick but thorough quiz.

Function of Beauty Hair Reviews: What Do Customers Think?

Function of Beauty Hair Review

After getting to know the products and the possibilities, it’s important that I look into what customers are saying about them.

Let’s start with the fact that Function of Beauty has over 73,000 five-star reviews on its website—that’s a lot of happy customers! One shared their experience and said the following:

I 100% enjoyed both these products, from the smell to how my hair felt. It also made my oily hair last longer without washing! One critique I have seen is that people not used to a natural shampoo found it oily, I myself chose oil control as one of the additions, this may help with that issue. Will be buying again!

Others frequently mentioned how their hair is left super soft, and hydrated after washing. One customer said that Function was the only product that they would use for their hair, and would continue to order their formulation without a single doubt. That’s really saying something.

One customer remarked that Function had done wonders for their hair. The Function of Beauty review read:

“I have used their shampoos and conditioners for about half a year now. It has made such a difference in my hair that I have now started testing their face serum and I’m going to order custom body wash and lotion! I’m completely sold on this company from all the products I’ve tested so far.”

A constant compliment I noted from customers is that Function made their hair “squeaky clean.” The happy buyers loved the smell, thought the quality was excellent—higher than any drugstore products. 

All in all, what I found wasn’t too surprising considering my belief in custom hair care, but I was super happy that customers are having such great experiences nonetheless. Everyone’s hair care journey is going to be different, but custom options make the path a little more straightforward.

Is Function of Beauty Haircare Worth It?

Function of Beauty Hair Review

With tens of thousands of happy customers, I believe Function of Beauty is worth a try. I appreciate the careful process at Function of Beauty which accounts for individual goals and differences amongst customers. This allows for a more tailored solution for your needs.

One thing to note is how impressive the level of customization and natural ingredients used by Function of Beauty are. Buy yourself a bottle, do it up just right, and when you try it, take the time to see if it’s right for your needs.

Function of Beauty Promotions & Discounts 

Function of Beauty Hair Review

I recognize that Function of Beauty products are more expensive than your average drug store brands. Since they’re made just for you (like at your beckoned call), it makes sense, though I won’t lie and say I didn’t track down every deal available, because…I did. You’ll find them all here:

  • On the website, new customers can get 10% off their first order by using code ‘HBR10
  • Subscribe to get 20% off your 1st large shampoo + conditioner & get exclusive access to launches and deals
  • Students get 20% off
  • Free shipping always
  • Free one-time reformulation

There used to be something called the Function of Beauty Ambassador Program which was a unique referral rewards system, but it’s not available right now.

Where to Buy Function of Beauty Haircare

Want to see the difference custom hair care can make? Head to Rather get essentials with your shampoo? You can create your favorite formulas right at too.


Cancel Function of Beauty Subscription

I’m happy to report that canceling the Function of Beauty subscription is a pretty easy process. Just follow these steps:

  1. Login and go to the Account page
  2. Click Your Subscriptions
  3. Select Manage
  4. Click Cancel Subscription 

If you cancel after your order has been initiated, the cancelation will apply to the next delivery cycle. After canceling your subscription, you’ll receive an email confirmation. If this email does not come within 24 hours, reach out so that Function of Beauty can help. 

Function of Beauty Shipping Policy

It’s my mission in this Function of Beauty hair review to give you a 360 of the brand, and that includes delivery. From formulation to shipping, the creation process normally takes 7-9 business days. The team will send you a shipping notification with a tracking number once your package has shipped. 

Shipping around the globe, I’ve included an outline below to give you an idea of when your order will be delivered:

CountryDelivery Time
US11-14 days
Australia39-45 days
Canada31-39 days
Chile15-22 days
European Union32-36 days
Great Britain31-33 days
Hong Kong32-40 days
Iceland39-47 days
Israel34-35 days
Japan36-38 days
Mexico32-40 days
New Zealand31-37 days
Singapore9-12 days
Switzerland34-40 days
Taiwan30-32 days

There may be taxes or duties depending on where your package is being sent, according to my investigation in this Function of Beauty hair review. If you live in Australia, Canada, EU, Hong Kong, Mexico, New Zealand or Great Britain, you’ll receive your package with no further duties or taxes than those you pay at checkout. 

If your location is in Iceland, Israel, Norway, Singapore, Switzerland, Taiwan or the United Arab Emirates, you may incur additional duties or taxes as per your country’s customs laws. 

Function of Beauty Return Policy

In this Function of Beauty hair review, I learned about the Happy Hair Guarantee. The team is passionate about creating products that match your unique characteristics and live up to your standards. After trying the shampoo at home, if it’s not hitting the bar, let them know so that they can improve the product to meet your needs. 

Reach out to the team at [email protected] and express your concern within 30 days of receiving your first order. The team will do its best to resolve the issue, and if your concerns are not addressed with a free one-time reformulation, you will receive a full refund within 30 days of delivery of your first order. Note that if you choose the one-time free reformulation, you will not receive a refund for the original purchase. 

Contact Function of Beauty  

If you have a question or concern that wasn’t addressed in this Function of Beauty hair review, visit and fill in the contact form. A team member will get back to you asap.

Looking for more hair color options? Check out the extensive Madison Reed collection and XMondo Hair.

Article Sources

[1] Grice, E. A., & Segre, J. A. The skin microbiome. Nature reviews U.S. National Library of Medicine Microbiology, 9(4), 244–253
[2] Monselise, A., Cohen, D. E., Wanser, R., & Shapiro, J. What ages hair? U.S. National Library of Medicine International journal of women's dermatology, 1(4), 161–166
[3] Constantinou, A., Kanti, V., Polak-Witka, K., Blume-Peytavi, U., Spyrou, G. M., & Vogt, A. The Potential Relevance of the Microbiome to Hair Physiology and Regeneration: The Emerging Role of Metagenomics U.S. National Library of Medicine Biomedicines, 9(3), 236
[4] Smith, R. W., & Keller, K. L. If all their products seem the same, all the parts within a product seem the same too: How brand homogeneity polarizes product experiences ScienceDirect International Journal of Research in Marketing, 38(3), 698–714
[5] Araújo, L. A., Addor, F., & Campos, P. M. Use of silicon for skin and hair care: an approach of chemical forms available and efficacy U.S. National Library of Medicine Anais brasileiros de dermatologia, 91(3), 331–335
[6] Sharmeen, J. B., Mahomoodally, F. M., Zengin, G., & Maggi, F. Essential Oils as Natural Sources of Fragrance Compounds for Cosmetics and Cosmeceuticals U.S. National Library of Medicine Molecules (Basel, Switzerland), 26(3), 666
[7] Kirchhof, M. G., & de Gannes, G. C. The health controversies of parabens Skin therapy letter, 18(2), 5–7
[8] Bom, S., Fitas, M., Martins, A. M., Pinto, P., Ribeiro, H. M., & Marto, J. Replacing Synthetic Ingredients by Sustainable Natural Alternatives: A Case Study Using Topical O/W Emulsions U.S. National Library of Medicine Molecules (Basel, Switzerland), 25(21), 4887
[9] Battistella, C., McCallum, N. C., Gnanasekaran, K., Zhou, X., Caponetti, V., Montalti, M., & Gianneschi, N. C. Mimicking Natural Human Hair Pigmentation with Synthetic Melanin U.S. National Library of Medicine ACS central science, 6(7), 1179–1188
[10] Hwang, J.-A., Goh, M.-J., Kim, E.-J., Lee, M.-R., Park, N.-H., Na, Y.-J., Cho, J.-C., & Lee, H.-K. Identification of Sake Extract as a New Anti-melanogenic Ingredient by in vitro and Clinical Trials SAGE Journals Natural Product Communications
[11] Lee, J. Y., Cho, Y. R., Park, J. H., Ahn, E. K., Jeong, W., Shin, H. S., Kim, M. S., Yang, S. H., & Oh, J. S. Anti-melanogenic and anti-oxidant activities of ethanol extract of Kummerowia striata: Kummerowia striata regulate anti-melanogenic activity through down-regulation of TRP-1, TRP-2 and MITF expression U.S. National Library of Medicine Toxicology reports, 6, 10–17
[12] Miwa, T.K. Jojoba oil wax esters and derived fatty acids and alcohols: Gas chromatographic analyses SpringerLinks J Am Oil Chem Soc 48, 259–264 (1971)

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