Kayo Concentrated Firming Serum
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WORKS FOR
- Moisturizing
KEY INGREDIENTS
- aleurites moluccanus seed oil
- caffeine
- glycerin
- +2 more
PROMISES
FULFILLED
FULFILLED
75
/100

IRRITANCY
MEDIUM
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Formula review
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Promise
What does the product description say? "Supports overall sleeker-looking skinSupports smoother-looking skinSupports firming-looking skinHydrates the skinTip."
WIMJ summary
This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": glycerin, sodium hyaluronate.
When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. If the air is dry, humectants can speed up the moisture loss from the skin. This is why it is a good idea to use another product on top of this one to help "seal in" the moisture (look for ingredients like dimethicone, squalane, oils and butters).
Ingredient | Effectiveness | Concentration | Irritancy |
---|---|---|---|
HIGH | |||
HIGH | |||
MEDIUM
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Potential irritants

IRRITANCY
MEDIUM
Ingredient | Irritancy | Skin Benefit |
---|---|---|
sorbitan laurate | ||
caffeine | ||
hamamelis virginiana leaf extract |
Ingredients by volume
Ingredient | Estimated concentration |
---|---|
Plain old water
| 40% - 60% |
One of the best moisturizing ingredients. Attracts water into the upper layer of the skin
| 6.3% - 9.5% |
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
| 3.5% - 5.2% |
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Questions
Skincare resources
Scientific Sources
- Hyaluronic acid: A key molecule in skin aging
- Hyaluronan (Hyaluronic Acid): a natural moisturizer for skin care
- Glycerol and the skin: holistic approach to its origin and functions
- Topical application of Calendula officinalis (L.): Formulation and evaluation of hydrophilic cream with antioxidant activity
- The seamy side of natural medicines: contact sensitization to arnica (Arnica montana L.) and marigold (Calendula officinalis L.)
- Final report on the safety assessment of Calendula officinalis extract and Calendula officinalis
- Contact dermatitis as an adverse reaction to some topically used European herbal medicinal products – part 1: Achillea millefolium–Curcuma longa
- Symphytum Species: A Comprehensive Review on Chemical Composition, Food Applications and Phytopharmacology
- Antioxidant Capacity and Other Bioactivities of the Freeze-Dried Amazonian Palm Berry, Euterpe oleraceae Mart. (Acai)