The Clean Start Duo

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.

What's included in the Duo:

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.

Theorem Serum Boost is formulated with four ingredients, each chosen for what hormonally changing skin specifically needs:

Triple-weight hyaluronic acid — three different molecular weights layer hydration from the surface down to as deeply as it can, instead of sitting on top like a single HA weight formula.

Bio-fermented peptides — One of the only brands to ferment our signaling peptides, to help create smaller molecules your skin can actually absorb more efficiently and effectively. Made through Caire's proprietary fermentation process, so they help reach the layers where new collagen is actually built.

Arabian jasmine — chosen specifically for the eye area, where most actives get diluted down or left out entirely. It works on melanin buildup directly, which is one of the two real causes of dark circles (the other is blood pooling — that's hawthorn's job, below).

Hawthorn berry extract — works alongside jasmine on the actual mechanics of dark circles: the leaky capillaries that let blood pool under the eyes in the first place. It's the reason the under-eye area looks bluish-purple, not just discolored.

Together, this pairing is Theorem Serum Boost's real standout for eye-area performance. 

Clean, vegan, fragrance-free, and hormone-safe.

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.