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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.
Volumizing Root Serum.
For Fine, Thinning Hair.
Deep Conditioning Repair Mask.
For chemically treated, colored or heat damaged hair.
Damage Recovery Oil.
For dry, frizzy hair and split ends.
Blonde Boosting Shampoo
For blonde, highlighted or gray hair
Blonde Boosting Conditioner
Blonde Boosting Duo
Hydration Shampoo
For dry, damaged or frizzy hair
Hydration Conditioner
Hydration Shampoo & Conditioner
Texturizing Shampoo
For fine, thin or flat hair
Texturizing Conditioner
Texturizing Shampoo & Conditioner
Curl Cream
Enhance & define curls
Blowout Styling Balm
Eliminate frizz and protect from heat
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.
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!
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 Mask 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.
5.5 fl oz | 163 ml
Ingredients: Water (Aqua), Cetyl Alcohol, Dimethiconol Meadowfoamate, Glycerin, Isopropyl Myristate, Behentrimonium Chloride, Cocos Nucifera (Coconut) Oil, Melaleuca Alternifolia (Tea Tree) Leaf Water, Biotin, Bambusa Vulgaris Leaf/Stem Extract, Chondrus Crispus Extract, Equisetum Arvense Extract, Chenopodium Quinoa Seed Extract, Rosa Damascena Flower Water, Hydroxyethylcellulose, Fragrance, Silicone Quaternium-3, Trideceth-12, Tetrasodium Glutamate Diacetate, Phenoxyethanol, Caprylyl Glycol, Ethylhexylglycerin, Hexylene Glycol, Isopropyl Alcohol, Sodium Hydroxide, Benzyl Salicylate, Citral, Hexyl Cinnamal, Hydroxycitronellal, Limonene, Linalool, Alpha-Isomethyl Ionone
Directions: For Oily/Normal Hair: Apply to damp hair in place of conditioner. Allow 5-10 minutes and rinse. Style as usual. Damaged/Breaking Hair: Start with damp hair. Apply instead of a leave-in conditioner. Air dry or activate with heat by blow-drying or using a heated styling tool.
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After your first Subscribe & Save order, you will receive: 10% Discount: 1 Product 15% Discount: 2 Products 20% Discount: 3+ Products The more you buy, the more you save! Add new products, edit or postpone an order at any time! NO contract | NO fees | FREE shipping
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Dermatologist Tested
Vegan
Gluten-Free
No Animal Testing
The unique silicon molecules (atomic number 14) within this hair mask are proven to penetrate the "plates" of the hair shaft. Similar to the way hyaluronic acid is injected into lips for a plumping effect, this material is "micro-injected" into your hair shaft for a plumping effect. This effect is actually improved by heat, so if you do choose to heat style your hair, these molecules will actually activate and expand, making each individual hair strand thicker, stronger, and smoother. Normally heat breaks down your hair but this mask allows you to harness the power of heat to strengthen your hair, helping it to grow stronger, thicker and longer.
"Smells really good- love how her hair feels after one use."
For fine, thin or flat hair.
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