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Cleanse + Treat
Theorem Serum Boost + The Grownup Cleanser™
$118.00
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Your serum can only work on skin that is ready for it. That is the whole idea behind this pairing: a cleansing balm that respects your barrier, followed by the serum that does the heaviest lifting in your routine.
The Grownup Cleanser™, 200ml / 6.76 fl. oz.
A milky melting balm that goes on solid, turns to a silky oil, and lifts away makeup, SPF and the day without stripping. Calm, gentle, SLS-free and weightless.
Theorem Serum Boost, 30ml / 1 fl. oz.
Hyaluronic Molecular Nutrition and Bio-Intensified Peptide. The treatment step that supports hydration and firmness where mature skin needs it most.
Cleanser Ingredients: Butyrospermum Parkii Butter,Cocos Nucifera Oil (*), Helianthus Annuus Seed Oil, Aqua, Stearyl Stearate, Glycerin, Lauryl Glucoside, Cocamidopropyl Betaine, Hydrogenated Castor Oil, Copernicia Cerifera Cera, Rhus Verniciflua Peel Cera, Theobroma Cacao Butter, Oryza Sativa Bran Oil, Polyglyceryl-3 Stearate, Silica, Simmondsia Chinensis Seed Oil (*), Cucurbita Pepo Seed Extract, Tocopheryl Acetate, Sodium Ascorbyl Phosphate, Sodium Hyaluronate, Glyceryl Stearate Citrate, Phenoxyethanol, Xanthan Gum, Sodium Benzoate, Potassium Sorbate, Citric Acid.
Theorem Serum Boost Ingredients:Water, Glycerin, Propanediol, Sodium Hyaluronate, Betaine, Disodium Edetate, Hydrolyzed Sodium Hyaluronate, Jasminum Sambac (Jasmine) Flower Extract, Crataegus Monogyna Flower Extract, Yeast Extract, Tetradecyl Aminobutyroylvalyaminobutyric Urea Acetate, Caprylhydroxamic Acid, Sodium Benzoate, Soy Amino Acids, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Amino-Esters-1, Coccinia Indica Fruit Extract, Corallina Officinalis Extract
Theorem Serum Boost:
Use 1 to 2 dropperfuls on cleansed face & neck 2 times daily. Safe for use around the eye area, pat gently onto lid & undereye. May also be used on the hands and chest.
The Grownup Cleanser™:Apply to dry skin morning and night. Massage a small amount between your fingertips and gently work into face and neck, allowing the balm to melt into an oil as it lifts away makeup and buildup.
Add water to emulsify, then rinse thoroughly.
Pro tip:Take your time here. The way you cleanse sets the tone for everything that follows.
Sizes: Theorem Serum Boost: 1 oz | 30ml — approximately 1 month supply (twice-daily use) The Grownup Cleanser™ 200ml / 6.76 fl. oz.
Dermatologist Tested | Patented Tech | Women-Founded | Created in NYC

the grownup cleanser™
The Grownup Cleanser™ is a solid-to-oil cleansing balm that removes makeup, SPF, and buildup while helping maintain your skin barrier, so your skin feels soft, not tight.
THEOREM SERUM BOOST
Our spectrum of HA's quickly work to help make skin (and eyes) behave and look younger through healthier skin that builds itself back up.
Clinical Results
*Results seen after 4 weeks, 2x daily in users aged 40–69.

did you know
Skin 40 and over, particularly anyone whose routine has quietly stopped working. If your cleanser leaves your face feeling tight, or your serum does not seem to go as far as it once did, this pairing addresses both at the same time. Formulated with mature and menopausal skin in mind.
Yes — it's formulated for mature, hormonally-shifting skin and is dermatologist tested.
Apply morning and night to clean skin, before moisturizer.
Comfort usually changes first, often within the first few washes, because you stop stripping your barrier at step one. Hydration and firmness build with consistent use over weeks rather than days. Skincare for Grownups® works by compounding, so results come from using it regularly, not occasionally.
Yes. Cleanse with the balm, apply Theorem to clean skin, then continue with your moisturizer, eye product or SPF as usual. If you use a retinol or other prescription treatment, keep applying it as your provider directs and layer Theorem on clean skin beforehand.