Kayo - Concentrated Firming Serum

Kayo Concentrated Firming Serum

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  • Moisturizing
  • aleurites moluccanus seed oil
  • caffeine
  • glycerin
  • macadamia ternifolia seed oil
  • sodium hyaluronate
  • +2 more
75 /100

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Formula review

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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
meets threshold
meets threshold
meets threshold

Potential irritants


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%
Helps water and oil mix together
2.5% - 3.7%
2% - 3.1%
Might be helpful in neutralizing free radicals. Can have a dehydration effect that might somewhat decrease the look of puffy eyes
1.5% - 2.3%
A plant extract that can help calm down inflammation in skin. Can, however, itself be irritating
1.3% - 2%
A plant extract that has some anti-oxidant and anti-bacterial properties. Can be irritating
1.1% - 1.6%
0.95% - 1.4%
A plant extract that has an anti-bacterial effect
0.55% - 1.3%
Plant extract that can have healing and anti-inflammatory properties. It is a potential allergen and can be irritating
0.45% - 1%
A plant oil that might help neutralize free radicals, but evidence of effectiveness in skin is lacking
0.35% - 0.85%
Plant oil from nuts that helps soften the upper layer of the skin. Contains a high concentration of oleic acid that can weaken skin's barrier function and increase water-loss while enhancing penetration of other ingredients
0.35% - 0.85%
The ingredient is not recognized
Helps soften the upper layer of the skin
0.15% - 0.6%
A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.
0.1% - 0.45%
The ingredient is not recognized
Used mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin
0.1% - 0.5%
A preservative
0.05% - 0.2%

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Scientific Sources