Theorem - About Us - About Theorem

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Who is Theorem?

We specialize in producing and developing our own line of high-end, bespoke hair care
products. Theorem was developed by a brilliant team of female scientists and designers with 75 years of combined
experience, who have developed best-selling products with over a billion dollars in revenue sold worldwide. Disappointed
with products on the shelf, we designed phenomenal formulas and packaging that finally met our standards. We started
sharing them with friends and family, and they became so popular we had to start a full-scale production.

Family Owned

We pride ourselves in the simplicity of our business model. We formulate, test, package, market and manufacture our
products under one wholesome, family-owned roof. By taking control of every part of the business, we can provide
increased transparency and a more effective product for the price.

The Theorem Advantage:

Driven by Beauty, Backed by Science

We have our own private R&D team, our own lab, and our own manufacturing plant. With over 25 years in manufacturing, we make all Theorem formulas ourselves, in our Chicago-based, family-owned facility. We have first access to the latest clinical studies and ingredients so we are always one step ahead of the pack.

What Makes Us Unique?

Heavily rooted in R&D, you could say our team geeks out about hair care. Each product is hand-crafted to incorporate proven science. Every formula is perfectly pH balanced to promote a healthy root, strand and tip. We’ve reviewed thousands of clinical studies and worked on 10’s of thousands of formulations throughout our careers. Theorem is a culmination of the most promising data of our combined lifetimes.

A pH of 7 is chemically neutral. Hair care products with a pH value in between 3.5 and 5.5 are considered as being beneficial for hair care products.

Inspired formulas

Our dream is to help people increase confidence and restore their own hair. Our custom formulas are designed to
strengthen and thicken each strand. Our product development process is fueled by friends and family. Each formula is
passed out to friends and family for feedback, and revised based on everyone’s personal experience. We took our time to
get the formulas right and as a result we have built a cult following.

Testimonials

Raquel S.

"Wow’d by the softness of my hair after using it once! "

Tiffany M.

"Smells amazing."

Jess V.

"Smells really good- love how my hair feels after one use."

Hannah L.

"I loved the way it feels on my hair. Super easy to brush through after the shower."

Alissa

"AMAZING PRODUCT! "

Valerie V.

"Loved it - using it since 03/2020"

Rebecca B.

"Loved it - using it since 03/2020"

Alex

"The smell was amazing! Hair was noticeably soothed."

Allison M.

"Loved the way the hair effortlessly blow dried out and have great shine."

Brooke D.

"My long hair is such a pain to brush and after one use I noticd it was smooth and much easier to comb through."

60-Days Guarantee

We have so much faith in our products that we offer a 60-day, no quibble, money-back guarantee. If you don’t love our products, just send it back to us for a full refund.

Shipping

Once your order is confirmed shipped, you will receive your items in 5-7 business day.

Free Shipping

Spend $65 or more
and shipping is on us!