Our Products.The Theorem Method is a 3-part haircare system that offers a simple solution to healthier hair.
Our simple 3-part system offers lightweight, nourishing solutions that support healthy hair growth while mending
damaged, brittle hair. Resulting in thicker, longer, stronger, and healthier hair.  The MethodThe Theorem Method is a 3-part hair care system used to achieve thicker hair from root to tip. These products take a comprehensive approach to strengthening and thickening your hair. Our formulas are precisely pH-balanced to promote a healthy scalp, follicle, cuticle, and hair cortex. Watch as the clinically-proven formulas strengthen and thicken your strands, giving you the length, shine, and fullness you desire. Best used in conjunction with each other but can be used as separate products based on your hair care needs. Shop Now Square RootVolumizing Root Serum.For Fine, Thinning Hair. Targets hair growth at the root. Thick hair begins with a healthy scalp, and this pH balanced serum plants the seed for dense, gorgeous hair. Square Root fights inflammation-related follicle narrowing, and restores pigment to gray hair naturally (with no dyes). DHT blockers inhibit hormonal hair fall and natural prebiotics promote a healthy, strong skin barrier. Also features a natural alternative to Minoxidil. Minoxidil is the only prescription hair growth ingredient that is FDA approved, but it comes with terrible side effects, which is why we use a safe and natural option instead. Shop Now DensityConditioning Treatment.For chemically treated, colored or heat damaged hair. There’s one very important cause of hair loss that is always overlooked: hair breakage. Weak strands with damaged cuticles break easily and hair just can’t grow long or thick. Theorem Density Conditioning Treatment repairs the hair cuticle to promote hair retention. The advanced, silicon-infused formula plumps up hair strands like an injectable filler. Works synergistically with heat to strengthen and thicken hair strands, giving you the length and shine you deserve. Shop Now Sugar PiDamage Repair Oil.For dry, frizzy hair and split ends. No matter how fast your hair grows, split ends are an annoying obstacle between you and your long-hair goal progress. This deeply nourishing oil revives and mends split ends, enabling you to grow your hair longer without trimming away damage so frequently. This sustainable, sugar-derived oil repairs damaged cuticles for strong, glossy, frizz-free hair. This naturally-derived, renewable complex is extracted from plant sugar, and microinjects a clinically-proven hair-healing form of Vitamin C into each hair strand to revive broken strands and split ends. Shop Now Volume DuoTexturizing Shampoo & ConditionerFor fine, thin or flat hair. This 3-dimensional shampoo and conditioner combo takes your hair to new heights. Pump up the volume with this gravity defying, anti-pollutant shampoo and conditioner that builds volume over time. Give your hair the depth it needs and the height it desires. Shop Now Infinity DuoHydration Shampoo & ConditionerFor dry, damaged or frizzy hair Give your hair the quality of being infinitely shiny, hydrated, and soft with the Infinity shampoo and conditioner combo. Your hair will have boundless amounts of sparkle with this amazing shampoo and conditioner set. Say good-bye to frizz and hello to smooth, beautiful hair. Shop NowThe MethodThe Theorem Method is a 3-part hair care system used to achieve thicker hair from root to tip. These products take a comprehensive approach to strengthening and thickening your hair. Our formulas are precisely pH-balanced to promote a healthy scalp, follicle, cuticle, and hair cortex. Watch as the clinically-proven formulas strengthen and thicken your strands, giving you the length, shine, and fullness you desire. Best used in conjunction with each other but can be used as separate products based on your hair care needs. Shop now Square RootVolumizing Root Serum. For Fine, Thinning Hair. Targets hair growth at the root. Thick hair
begins with a healthy scalp, and this pH
balanced serum plants the seed for
dense, gorgeous hair. Square Root fights
inflammation-related follicle narrowing,
and restores pigment to gray hair naturally
(with no dyes). DHT blockers inhibit
hormonal hair fall and natural prebiotics
promote a healthy, strong skin barrier. Also
features a natural alternative to Minoxidil.
Minoxidil is the only prescription hair
growth ingredient that is FDA approved,
but it comes with terrible side effects,
which is why we use a safe and natural
option instead.
Shop now DensityDeep Conditioning Repair Mask. For chemically treated, colored or heat damaged hair. There’s one very important cause of hair
loss that is always overlooked: hair
breakage. Weak strands with damaged
cuticles break easily and hair just can’t
grow long or thick. Theorem Density Conditioning Treatment
repairs the hair cuticle to promote hair
retention. The advanced, silicon-infused
formula plumps up hair strands like an
injectable filler. Works synergistically with
heat to strengthen and thicken hair
strands, giving you the length and shine
you deserve.
Shop now Sugar PiDamage Repair Oil. For dry, frizzy hair and split ends. No matter how fast your hair grows, split
ends are an annoying obstacle between
you and your long-hair goal progress. This
deeply nourishing oil revives and mends
split ends, enabling you to grow your hair
longer without trimming away damage
so frequently.
This sustainable, sugar-derived oil repairs
damaged cuticles for strong, glossy,
frizz-free hair. This naturally-derived,
renewable complex is extracted from
plant sugar, and microinjects a
clinically-proven hair-healing form of
Vitamin C into each hair strand to revive
broken strands and split ends.
Shop nowVolume DuoTexturizing Shampoo & Conditioner For fine, thin or flat hair. This 3-dimensional shampoo and conditioner combo takes your hair to new heights. Pump up the volume with this gravity defying, anti-pollutant shampoo and conditioner that builds volume over time. Give your hair the depth it needs and the height it desires. Shop nowInfinity DuoHydration Shampoo & Conditioner For dry, damaged or frizzy hair Give your hair the quality of being infinitely shiny, hydrated, and soft with the Infinity shampoo and conditioner combo. Your hair will have boundless amounts of sparkle with this amazing shampoo and conditioner set. Say good-bye to frizz and hello to smooth, beautiful hair. Shop nowTestimonialsRaquel 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! 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! |