Function of Beauty Hair Serum

Custom hair serum bottle with formula pouring out, showing lightweight texture and glassy shine.

Custom hair serum texture, showing lightweight texture and glassy shine.

Woman with healthy, coily hair after using her custom hair serum.

Custom Hair Serum

Create Your Formula

A custom lightweight serum that enhances shine while smoothing frizz and flyaways.

Key Benefits

Reduces frizz by 70%.

Improves shine 26x more than untreated hair.

Protects hair from thermal damage up to 400°F.

Key Ingredients

Combined in a unique blend created just for your hair, every hair serum formula starts with these three ingredients:

Annatto Oil

Enhances hair's natural color and adds shine to each strand.

Sunflower Seed Oil

Helps to improve skin barrier function and maintain hydration.

Argan Oil

Hydrates, nourishes, and softens hair while boosting shine.

Jojoba Oil

Forms a lightweight, protective film on hair to help lock in moisture.

How to Use

Rub product in your hands and apply to wet or damp hair. Distribute the product evenly from the mid-shaft to ends, making sure to avoid the roots. Do not rinse out, and style as usual!

FAQ

What type of hair does this serum work for?

Function of Beauty’s custom serum is lightweight and works for all hair types.

How do I create my custom hair serum?

Get started by taking the Function of Beauty hair quiz!

If I have fine or thin hair, will this weigh my hair 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 just 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.

See More FAQ

Reviews

If you are looking to transform your hair...

Every time I use it over night, my hair looks so good the next day I forget I even considered to wash it out. It contends with Moroccan oil and is a lighter product. A little goes a long way, 2 pumps over night. One pump for the SMOOTHEST, light feeling hair ever. If you are looking to transform your hair, start incorporating this product ASAP, you will see changes instantly.

Victoria

Game Changing

The FoB Hair Serum is a complete game changer for me. I live in a part of the country where we have all 4 seasons. This serum keeps my hair smooth and frizz free without being heavy or greasy. It works for the swampy humidity of summer and they dry cold winter.

Nessa

My all time fave!

Why do I love this serum so much? As a curly hair girl who has had very damaged hair, this serum has been my bestie when I wash my hair. It always makes my curls look healthy and beautiful. I also love to use it when blow drying my hair as well, since it gives it shine and makes it look super healthy.

Noelys