Theorem Serum Boost

• Deep multi-layer hydration
• Clinically proven collagen rebuilding for firmer skin
• Helps to strengthen skin barrier from hormone decline
• Proprietary fermentation process for skin longevity

Theorem Serum Boost is Caire Beauty's all-in-one face, eye, neck, and chest serum, built for the hormonal skin changes that begin in your late 30s and continue through menopause — when declining estrogen slows your skin's own production of hyaluronic acid and collagen.

Your skin didn't stop working. It stopped getting what it needs. Theorem Serum Boost gives it back: a triple-weight hyaluronic acid complex that hydrates at every layer, paired with bio-fermented peptides that signal your skin to rebuild collagen on its own. In clinical testing, 97% of women saw skin that looked up to five years younger, and 100% saw softer, firmer skin within four weeks.*

This is not surface moisture. It's skin health support, formulated for women whose skin has started to change — and tested on skin like yours, not skin half your age.

*Results after 4 weeks, twice-daily use, women ages 40–69.

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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.