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A Powerful Serum!
“I've been using the serum twice a day ... and can see a difference in my skin’s texture. The Theorem Serum Boost is much richer than other Hyaluronic Acid products ... & has done wonders for my combination skin - it looks & feels smoother & more evenly hydrated.”
The 1st to create skincare in our lab, not at a 3rd party contract manufacturer, to address midlife skin with better formulations & superior ingredients at a better-for-you price.
● Helps build skin back
Your skin isn't “just aging.” It's responding to hormone changes.
Estrogen decline causes sudden dehydration, collagen loss, puffiness, and dullness. And most products weren’t built for that. This one was.
Use it when:
This isn't white-labeled skincare with a pretty logo.
Theorem Serum Boost is proprietary,developed by us in a biotech lab - not handed off to a third-party manufacturer. Formulated by a PhD, tested by dermatologists, and created specifically for hormonally aging skin.
Made in the USA. Clean. Vegan. No shortcuts.
The difference is real - and you'll feel it.
So we went about creating it with our scientist partners in our own lab. Mature skin care formulas that works to help build skin back up from the inside out.
Effective Facial Skin Care Science That REALLY Does What It Says.
Stimulates Hyaluronic Acid (HA) production (HA = Fountain of Youth key skin molecule). Ever wonder how to enhance collagen production in skin? 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. An all-in-one anti-aging firming, lifting, hydrating serum for the face, around the eyes, neck, chest, hand areas.
97% of users said they looked 5 years younger.
100% of Women saw visibly firmer, softer skin (and eyes) after 4 weeks*
Apply one to two dropperfuls morning and night after cleansing. We are serious when we say to apply the skin firming serum twice a day; otherwise, those unique regenerative skin-building hyaluronic acid benefits may never happen.
Apply before other serums, retinols or a moisturizer, or facial oil. After using Caire's serum for smooth skin you may elect to use The Grownup Moisturizer for deeper hydration.
Use the multi-molecular hyaluronic serum on the face, neck, chest, and/or back of hands and wherever else you feel the need.
Eye-vantage: Pat gently around eyes but don’t miss the undereye, eyelid, and all around. Feeding this ocular area is a win. Because with consistent use, you can help lift up sags and bags around the eye area - one of the top skin concerns from hormone-caused aging.
1 oz | 30ml Serum - 1 month supply, used twice daily (based on 1 dropper per use).
0.5 oz | 15ml Serum - 1/2 month supply, used twice daily (based on 1 dropper per use).
FULL INGREDIENT LIST:
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 Trifluoroacetate, 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
Stimulates Hyaluronic Acid (HA) production (HA = Fountain of Youth key skin molecule). Ever wonder how to enhance collagen production in skin? 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. An all-in-one anti-aging firming, lifting, hydrating serum for the face, around the eyes, neck, chest, hand areas.
97% of users said they looked 5 years younger.
100% of Women saw visibly firmer, softer skin (and eyes) after 4 weeks*
Apply one to two dropperfuls morning and night after cleansing. We are serious when we say to apply the skin firming serum twice a day; otherwise, those unique regenerative skin-building hyaluronic acid benefits may never happen.
Apply before other serums, retinols or a moisturizer, or facial oil. After using Caire's serum for smooth skin you may elect to use The Grownup Moisturizer for deeper hydration.
Use the multi-molecular hyaluronic serum on the face, neck, chest, and/or back of hands and wherever else you feel the need.
Eye-vantage: Pat gently around eyes but don’t miss the undereye, eyelid, and all around. Feeding this ocular area is a win. Because with consistent use, you can help lift up sags and bags around the eye area - one of the top skin concerns from hormone-caused aging.
1 oz | 30ml Serum - 1 month supply, used twice daily (based on 1 dropper per use).
0.5 oz | 15ml Serum - 1/2 month supply, used twice daily (based on 1 dropper per use).
FULL INGREDIENT LIST:
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 Trifluoroacetate, 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
One Serum. Face + eyes.
Why layer 3 different products when one delivers deeper hydration, firming, and visible results in all the right places?
Proprietary science.
Learn why Caire actually works.
| CAIRE’S THEOREM SERUM BOOST | OTHER SERUMS | |
|---|---|---|
Face + Eye in one bottle | Built & tested for both face and eye zones; safe, potent, effective | Mostly formulated for the face; eye use is an afterthought; double or > the $$$ |
Fermented Bioavailable Peptides | Proprietary, fermentation process making it hyperabsorbably — you skin “drinks it in” | Standard 'out of the box' peptides (less bioavailability, less punch) |
Deep Multi-Weight | Triple-weight hyaluronic acid (HA) system with one of the tiniest HAs in the world that layers hydration as deeply as possible | Often only surface hydration or quick payoff |
Hormonally Aware Formulation | Formulated for changes post 35 / 40+ | Generic anti-aging claims with little to no skin-change specialization |
Clean Standards | Clean, vegan, fragrance-free, hormone-safe formulation. Tested on skin like yours | May include fillers or often includes harsh additives or reactive synthetics |
Clinically Proven Results | 100% saw smoother, more hydrated & nourished skin | Rarely tested on younger skin; not your hormone deprived skin |
Made for Hormone-Impacted Skin | PhD-formulated for women with mature skin | One-size-fits-all, anti-aging fluff |
Clean + Vegan + Sustainable as possible packaging | Always; fragrance-free. As much plastic is removed from packaging as is possible. | Sometimes; Many formulas include fillers, microplastics, fragrances, or don't test in your age cohort. |
Nutritive HA delivers deeper, better hydration
Improves microcirculation within the skin; soothes inflammation and redness especially around the eyes
Boosts collagen protein growth, keeping skin firm
A super ingredient that targets eye bags and droop around the eyes
At Caire, we don't rely on fillers, models, or wishful thinking.
Our products are clinically tested and proven to work — and our community of women is living proof. These real before & after photos show what happens when you combine breakthrough science with midlife confidence.
"My fine lines softened and my skin finally feels hydrated again." — Diane, 55
Before
After
Yes. Theorem Serum Boost is specifically formulated to be used on the face and around the delicate eye area—where perimenopausal and menopausal skin often shows the earliest signs of dryness, fine lines, and laxity. Powered by Eyefective, a clinically tested eye complex, it helps visibly improve the appearance of crow’s feet, under-eye dryness, dark circles, bags, and eye droop with continued use.
One serum. No extra eye cream required—unless you prefer a more occlusive layer at night. The formula has been safety tested for use around the eyes.
Yes. The formula is fragrance-free, clean, and designed with midlife, perimenopausal, and menopausal skin sensitivity in mind. As estrogen levels decline, skin can become more reactive and prone to irritation. Many customers with sensitive or reactive skin use Theorem Serum Boost comfortably.
If you have rosacea or a diagnosed skin condition, we recommend patch testing first and consulting your dermatologist.
Many women notice immediate hydration and smoother-feeling skin after the first use, along with a more refined-looking skin texture—especially midlife skin affected by hormonal changes during perimenopause and menopause.
With consistent morning and night use, visible improvements in firmness, fine lines, and overall skin quality typically appear within 2–8 weeks. Often, it’s not just what you notice—it’s when someone else does.
It depends on your skin and how it feels. During menopause, declining estrogen weakens the skin barrier and reduces natural hyaluronic acid and collagen production. Think of Theorem Serum Boost as your treatment step—what we call molecular nutrition—delivering deep hydration and collagen-supporting actives to address hormonally depleted skin.
You can follow with The Grownup Moisturizer®, a patented moisturizer designed for mature skin, to seal everything in, strengthen your skin barrier, and maximize long-term results.
Absolutely. Theorem Serum Boost is clean, vegan, cruelty-free, fragrance-free, and made without unnecessary fillers. It’s formulated specifically for women navigating perimenopause, menopause, and post-menopause, using advanced skin science to support long-term skin health—nothing extra, nothing your skin doesn’t need.
Hormonal skin—especially during perimenopause and menopause—absorbs moisture more slowly. Apply Theorem Serum Boost to slightly damp skin and gently press it in, including around the eyes, to help optimize hydration delivery and absorption.
Still searching for skincare that actually works in midlife? Dr. Beth explains how Caire changes everything.
Dry skin over 40? Carla Hall shares why Caire’s serum became her daily skin savior.
Skeptical? QVC wasn’t. Our serum sold out because results speak louder than promises.
All in the Family. All about the glow. Sally reminds us that grown-up women own the room.
Decades on stage taught me one thing: midlife skin needs deeper care. Caire gives it back.
