StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai
T
Theorem Serum Boost

Theorem Serum Boost

4.9(356 ratings)

Best price now

$56.00at Caire BeautyChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Caire Beauty

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $56.00 at Caire Beauty on Nov 8.

Our take on the Theorem Serum Boost

Theorem Serum Boost is an all-in-one anti-aging serum sold by Caire Beauty, meant for the face, around the eyes, neck, chest and hands. It leans on a spectrum of hyaluronic acids to support the skin's own HA and collagen, aiming at firmness, lift and hydration rather than a single active like retinol. The brand cites a four-week study in which 100% of women saw firmer, softer skin and eyes. It suits people who want a hydrating, firming serum they can use in several areas and who prefer to avoid retinoids; rivals in this space usually center on retinol, peptides or vitamin C instead.

Best forShoppers wanting a hydrating firming serum without retinolUse on face, eye area, neck, chest and handsMature skin focused on firmness and fine linesAnyone building a simple multi-area anti-aging routine
Pros
  • Multi-area use: face, eyes, neck, chest and hands
  • Hyaluronic acid blend targets hydration and firmness
  • Brand reports firmer, softer skin in 4 weeks for all study participants
  • Non-retinol formula suits those who can't tolerate retinoids
  • Strong buyer rating across a few hundred reviews
Cons
  • Clinical claims come from the brand's own study
  • No retinol or vitamin C for those wanting a stronger active
  • Results depend on consistent daily use
  • Little independent testing published

Theorem Serum Boost prices at every store

  • Caire BeautyNew

    In stockReturn policy

    $56.00Checked Nov 8
    Visit Caire Beauty

What reviewers say

  • 4.9 / 5356 ratings

Buyers rate it very highly, with most praising how it feels and the firmness and hydration they notice over weeks of use. Complaints are limited and tend to center on wanting faster results.

What people mention
  • HydrationPraisedBuyers say skin feels softer and more moisturized with regular use.
  • FirmnessPraisedReviewers report a firmer look, especially around the eyes and face.
  • TextureMixedSome like the light feel; others want something richer for dry skin.
  • Results timelineCriticisedA few say visible change took longer than they expected.
  • SensitivityPraisedUsers with sensitive skin say it suits them better than retinol serums.

About the Theorem Serum Boost

Theorem Serum Boost is an all-in-one hyaluronic acid serum for the face, around the eyes, neck, chest and backs of the hands. It is formulated to stimulate the skin's own hyaluronic acid (HA) production and to firm, lift and hydrate. It contains a full spectrum of HA molecules, GF-1 peptides, hawthorn and Arabian jasmine, and it uses the Caire Molecular Delivery System.

Apply one to two dropperfuls morning and night after cleansing, and before other serums, retinols, moisturizer or facial oil. Pat it gently around the eyes, including the undereye and eyelid. Depending on your skin type, you may be able to skip moisturizer afterward.

Type
Hyaluronic acid firming and hydrating serum
Key actives
Full spectrum of HA molecules, GF-1 peptides, hawthorn, Arabian jasmine, Caire Molecular Delivery System
Use on
Face, around the eyes, neck, chest, backs of hands
Directions
1 to 2 dropperfuls, morning and night, after cleansing
Order of use
Before other serums, retinols, moisturizer or facial oil
Sizes
1 oz (30 ml); 0.5 oz (15 ml)
Supply
1 oz lasts about 1 month and 0.5 oz about half a month, used twice daily at 1 dropper per use
Ingredients
Water, Glycerin, Propanediol, Sodium Hyaluronate, Betaine, Disodium Edetate, Hydrolyzed Sodium Hyaluronate, Jasminum Sambac (Jasmine) Flower Extract, Crataegus Monogyna Flower Extract, Yeast Extract,

Questions and answers

How does Theorem Serum Boost compare with a retinol serum?
It uses hyaluronic acids to support firmness and hydration instead of retinol. That makes it gentler for sensitive skin, but it won't deliver retinol's cell-turnover effects.
Where can I apply it?
The brand lists the face, the area around the eyes, the neck, chest and hands. It is designed as one serum for all those areas.
How long until I see results?
The brand's cited study measured firmer, softer skin after four weeks. Buyers often report gradual change over several weeks of daily use.
Is it suitable for sensitive skin?
It is a non-retinol, hyaluronic-acid-based serum, and reviewers with sensitive skin report tolerating it well. Patch test first if you react easily.
Can I layer it with other actives?
Yes, it layers under moisturizer and makeup. If you use strong actives like retinol or acids, alternate or space them out to avoid irritation.
Where is the Theorem Serum Boost cheapest?
At Caire Beauty, for $56.00, as of our latest check.
What do buyers say about the Theorem Serum Boost?
Rated 4.9 out of 5 from 356 ratings.

Shoppers also compared

  • O
    Olay Regenerist Micro-Sculpting Cream
    Olay Regenerist Micro-Sculpting Cream
  • T
    Tommy Hilfiger Men's Stretch Pants
    Tommy Hilfiger Men's Stretch Pants
  • M
    Michael Kors Men's Hooded Bomber Jacket
    Michael Kors Men's Hooded Bomber Jacket
  • C
    CeraVe Skin Renewing Night Cream
    CeraVe Skin Renewing Night Cream
  • C
    CeraVe Skin Renewing Retinol Serum
    CeraVe Skin Renewing Retinol Serum
  • T
    The Ordinary Retinal 0.2% Emulsion
    The Ordinary Retinal 0.2% Emulsion
  • C
    Coll20 Gel Cream Moisturizer
    Coll20 Gel Cream Moisturizer
  • A
    Anti-Aging Serum
    Anti-Aging Serum

More face serums

  • R
    Revive Serum : Ginseng + Snail Mucin
    Revive Serum : Ginseng + Snail Mucin
  • D
    Dream Booster Anti-Aging Bakuchiol Serum
    Dream Booster Anti-Aging Bakuchiol Serum
  • P
    Peptide Plump Line Filling Bounce Serum
    Peptide Plump Line Filling Bounce Serum
  • L
    Liquid Peptides
    Liquid Peptides
  • A
    Age Defy Serum - 50ml
    Age Defy Serum - 50ml
  • P
    Paula's Choice 1% Retinol Treatment
    Paula's Choice 1% Retinol Treatment
E
Estee Lauder Futurist Peptide Power Serum Primer
Estee Lauder Futurist Peptide Power Serum Primer
  • E
    Estée Lauder 升級再生基因修復精華 第七代小棕瓶
    Estée Lauder 升級再生基因修復精華 第七代小棕瓶