Custom Hair Serum – Smooth Frizz & Protect from Heat | Function of Beauty

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Custom Hair Serum

4.5 Read 3334 Reviews. Same page link.

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A custom serum formulated with sunflower seed oil and jojoba oil that smooths frizz, enhances shine, and protects hair from heat. The lightweight formula is fit for all hair types. Size: 3 oz

Customize to You

Not sure what you need? Take our quiz.

customize Name

function of:

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hair type

Select your hair type
WavyLoose s-shaped pattern found throughout.
CurlyDefined curl or spiral pattern to it.
CoilyTightly packed curls.
StraightNo bend or curl.

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hair goals (select up to 5 )

Tame frizz

Define curls

Deep condition

Hydrate

Replenish

Amplify shine

Strengthen

Straighten

Anti-breakage

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hair thickness

MediumThick as a strand of thread.
CoarseThicker than a strand of thread.
FineThinner than a strand of thread

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scalp moisture

BalancedMy scalp doesn't feel too dry or too oily.
OilyMy roots feel flat or greasy
DryMy scalp is tight and uncomfortable

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damage

Medium DamagePermanent hair color, daily use of heat tools.
High DamageBleach, Keratin treatments, perming, and/or frequent heat tool use.
Low DamageI don't color my hair or use a semi-perm color. Occasional use of heat tools, daily brushing.

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fragrances

FloretFloret - fresh, floral, rose, gardenia with earthy sandalwood
Vanilla suedeVanilla suede - vanilla, jasmine, sandalwood
Go cocoGo coco - rich, creamy coconut and sweet hints of honeysuckle
Strike a roseStrike a rose - rose, blackcurrant, sandalwood, orange blossom
Nude peachNude peach - peach nectar, mandarin, lemon zest, jasmine
All you calyptusAll you calyptus - eucalyptus, mint, lavender, rosemary
Takes Two to mangoTakes two to mango - mango, grapefruit, and mandarin
PearfectionPearfection - pear, apple, sweet musk, subtle florals
Fragrance freeFragrance free - for sensitive scalp

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Ingredients List

Purchase options

$31.00

$24.80

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One-Time Purchase

$31.00

Quantity

add to cart

About Silicones

Silicones are synthetic ingredients known for improving smoothness, shine and ease of detangling. However, some find silicone can weigh down their hair. Our silicone is a lightweight formulation that will work for most. In haircare, silicones are used to create slip, help smooth and protect from heat.

Ingredients List

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false

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Key Benefits

Significantly Reduces Frizz

After one application of your Custom Hair Serum you can expect frizz reduction by 70%.

Drastically Improves Shine

Our Custom Hair Serum Improves shine 26x more than compared with untreated hair.

Protects Hair from Heat

Protects all hair types from thermal damage up to 400°F, allowing you to style with confidence.

Fully Customizable

Made-to-order and formulated with your unique styling goals and hold level to easily achieve any style.

How to Use

Pause

Cleanse

Our Shampoo has a rich lather that gently cleanses the scalp while hydrating your strands. Hint: For curly and coily textures we suggest swapping in our Co-Wash every few washes for even more hydration.

Condition

Our Conditioner is your first defense against dry hair that's prone to breakage. But if you need an extra layer of protection, our Leave-In delivers hydration all day.

Treat

Twice a week we recommend swapping out your Conditioner for our Hair Mask and leave it on your hair for 5 to 10 minutes for a more intense treatment.

Prep

You can Function fearlessly thanks to our Hair Serum and Styling Primer, which protect your hair from heat while reducing frizz and increasing shine.

FAQs

What type of hair does this serum work for?

All types! Because we have formulated over 15 million uniquely customized products. That means this hair serum is custom made to fit your individual needs.

How do I create my Custom Hair Serum?

You can start by taking our Custom Hair Quiz!

If I have fine or thin hair, will this weigh it down?

No! We tailor your custom formula to your hair type to ensure it delivers shine, smoothness and heat protection to your hair, without weighing it down. Additionally, we recommend putting at the ends of your hair, not the roots.

Is this product silicone-free?

No, our Custom Hair Serum includes silicones and is designed to coat the surface of your hair to give shine and luster.

What are the benefits of subscribing?

Our subscription program, Function with Benefits, gives you perks like a welcome offer, members-only pricing, exclusive color and fragrance options, early access to deals, new product launches, and product testing!

Loren's Custom Hair Routine

Loren's Hair Profile:

Hair type:

Wavy

Hair Thickness:

Medium

Scalp moisture:

Balanced

Loren's Custom Routine:

\ Custom Shampoo](/content/products/shampoo/index.html) \ Custom Conditioner](/content/products/conditioner/index.html) \ Custom Styling Primer](/content/products/styling-primer/index.html) \ Custom Hair Serum](/content/products/hair-serum/index.html)

Melodie's Custom Hair Routine

Melodie's Hair Profile:

Hair type:

Curly

Hair thickness:

Fine

Scalp moisture:

Oily

Melodie's Custom Hair Routine:

\ Custom Shampoo](/content/products/shampoo/index.html) \ Custom Conditioner](/content/products/conditioner/index.html) \ Custom Styling Primer](/content/products/styling-primer/index.html)

Hunter's Custom Hair Routine

Hunter's Hair Profile:

Hair type:

Straight

Hair Thickness:

Medium

Scalp moisture:

Oily

Hunter's Custom Regimen:

\ Custom Shampoo](/content/products/shampoo/index.html) \ Custom Conditioner](/content/products/conditioner/index.html) \ Custom Hair Mask](/content/products/hair-mask/index.html) \ Custom Hair Serum](/content/products/hair-serum/index.html)

Kristina's Custom Hair Routine

Kristina's Hair Profile:

Hair type:

Coily

Hair Thickness:

Medium

Scalp moisture:

Balanced

Kristina's Custom Routine:

\ Custom Shampoo](/content/products/shampoo/index.html) \ Custom Conditioner](/content/products/conditioner/index.html) \ Custom Leave-in Conditioner](/content/products/leave-in-conditioner/index.html)

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Overall Rating

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Summary of Reviews

AI-generated from customer ratings & reviews, and may include incentivized reviews.

The hair serum has a lightweight, non-greasy formula that leaves hair feeling soft, smooth, and shiny. Customers report it helps reduce frizz and flyaways, and works well for various hair types, inclu...

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Rating

Hair Type:

1 to 8 of 3334 Reviews .

1 – 8 of 3334 Reviews

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Most Recent

JKK

Reviews 2

Votes 0

5 out of 5 stars.

The best hair serum and Purple shampoo

21 days ago

I LOVE YOUR HAIR PRODUCTS. But I don’t love your customer service/computer program. When you have questions, need help with order which I have happpened with 2 orders, you have no avenue get help. And when i do send a message comes from an AI person. Your back up in product is not ok, shipping took over twice as long as stated. Will I continue to order your purple shampoo and hair Serum, yes until I get too frustrated. I do think it is a wonderful product.

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Response from Function of Beauty:

8 hours ago

Customer Support

Hi there, Thank you so much for the kind words about our purple shampoo and hair serum, we’re really glad you love the product! We’re sorry to hear that getting help with your recent orders was frustrating, and that shipping took longer than expected. That’s not the experience we want for you. Your feedback about our support process is helpful, and we appreciate you taking the time to share it. If you need assistance with an order, please reach out through our Contact Us page so our team can look into it and help directly.

Ginny B

Review 1

Vote 1

Hair Type:Curly

Hair Texture:Fine

5 out of 5 stars.

The Absolute best!

3 months ago

This is by far the very BEST hair oil I have used on my dry curly hair.

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Anonymous

Reviews 4

Votes 4

1 out of 5 stars.

Doesn’t lock

11 months ago

I have been using this serum for years now. It’s light and very nice on the hair, however the one I received recently doesn’t lock so it got spilled everywhere. For this price I would expect good product packaging.

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Response from Function of Beauty:

11 months ago

Hi Astrid,

Thank you for letting us know about your experience. I’m so sorry your package arrived this way. Our team takes great care to make sure every set is properly filled, packaged, and delivered, so it sounds like you may have received a defective serum pump. We’re reaching out to make this right, so please keep an eye on your inbox for our email.

Shelly

Reviews 7

Vote 1

5 out of 5 stars.

Hair Serum

a year ago

Helps with Frizz and keeps hair shining and smooth

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Response from Function of Beauty:

11 months ago

Hi Shelly,

That’s amazing! We’re so glad your formula is keeping your hair frizz-free, smooth, and shining beautifully.

Myrna L.

Reviews 4

Votes 0

5 out of 5 stars.

Best Oil

a year ago

Light weight. Smells nice and moisturizes like nothing I have ever experienced!

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Response from Function of Beauty:

a year ago

Hi Myrna,

Thank you so much for the glowing review! We’re thrilled to hear you’re loving your Custom Hair Serum. With up to 70% frizz reduction after just one use and 26x more shine than untreated hair, it's designed to deliver serious results.

Amanda L.

Reviews 3

Vote 1

3 out of 5 stars.

Incorrect marketing - Fragrance free option isn’t true

a year ago

The hair serum marked as fragrance free is not true sadly and has a scent. Due to allergies I can’t use it. Can smooth hair but sadly I can’t be around it.

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Response from Function of Beauty:

a year ago

Hi Amanda,

Thank you for your feedback. We have sent you an email to offer you a full refund.

Laura M.

Review 1

Vote 1

5 out of 5 stars.

Best Hair Product

a year ago

This is the best hair product I have ever bought. I love how it makes my hair feel. It’s soft and not frizzy. I’m able to get volume where I need it.

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Response from Function of Beauty:

a year ago

Hi Laura,

That’s the beauty of custom formulas: every bottle is made to deliver exactly what your hair needs. If you ever want to enhance those results even further, our custom leave-in treatment can help maintain smoothness and moisture throughout the day. We can’t wait to see what formula you create to make every hair day your best.

Tina T.

Reviews 2

Votes 0

5 out of 5 stars.

This stuff is amazing

a year ago

I have used this on my hair of course but also on my face and neck area to keep my summer tan longer. It’s wonderful.

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Response from Function of Beauty:

a year ago

Hi Tina,

The silky feel can be useful for retaining moisture. You may have just saved my summer tan 😏

No questions have been asked about this product.

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