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Full Ingredient List (INCI):
According to CreamScan analysis, Kaia Naturals The Bikini Bright Brightening Milk is lightly moisturizing, with a moisturizing rating of 3.3 out of 10.
Is it more humectant or occlusive? Purely humectant. It has zero occlusivity (we didn't find any occlusive ingredients on the ingredient list) and a high humectancy of 6.6 out of 10, primarily due to the high content of Propanediol (est. ≈6.3%).
This humectant-rich product, when used alone as a moisturizer, is well-suited for oily skin, providing moderate hydration in a lightweight, fast-absorbing formula without any occlusive ingredients.
📌 Certain studies suggest that humectants alone may not effectively moisturize the skin. If you use this product as your only moisturizer, we recommend following it with one that contains at least some occlusive ingredients.
But it’s not limited to oily skin - such a humectant enhancement will also positively contribute to the moisturizing efficacy of any skincare routine when used as a step before applying the main moisturizer. This type of formulation is typically used in serums, where a light, fast-absorbing texture is key.
Please refer to the Ratings section below for details of the moisturizing rating calculation.
Based on the ingredient list analysis, Kaia Naturals The Bikini Bright Brightening Milk is rich (> 5%) in soothing ingredients, particularly Azelaic Acid (est. ≈9.4%).
When applied to the skin, compounds of soothing ingredients, such as triglycerides, phospholipids, fatty acids, phenolic compounds, and antioxidants, work together to soothe the skin through various mechanisms: reducing inflammation, promoting wound healing, repairing the skin barrier, and providing antimicrobial and antioxidant activities.
📌 Please note that this is not a complete list of benefits. We are in the process of enhancing our model to incorporate anti-pigmentation, exfoliation and anti-acne ratings.
While humectants are highly effective at attracting water to the skin, studies (J. N. Kraft, C. W. Lynde) suggest they may not be efficient when used alone.
One major drawback of purely humectant moisturization is that the water attracted by humectants to the upper layers of the skin can evaporate completely into the environment through transepidermal water loss (TEWL). Adding occlusive ingredients helps seal this moisture into the skin and prevent further water loss.
If you’re using Kaia Naturals The Bikini Bright Brightening Milk as your only moisturizer, consider pairing it with one that contains at least some occlusive ingredients, such as oils, butters, or silicones. These work alongside humectants to create a protective barrier, locking in hydration and ensuring longer-lasting moisturization. The amount of occlusive needed depends on your skin type - the drier the skin, the more occlusives it requires.
If this product is used not as a standalone moisturizer but as part of your skincare routine, such as a toner or serum, it should be applied before your main moisturizer (unless it's a sunscreen), which will provide the necessary occlusivity on top of it.
Est. %
The Estimated % is our algorithm-based assumption about an ingredient's concentration in a formula. Learn more The Estimated % is our algorithm-based assumption about an ingredient's concentration in a formula. Learn more | Ingredient | Origin | Functions | |
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85 | Water ![]() The most used ingredient in skincare. Its concentration defines the product texture: rich creams may have about 50% of water while a light jelly about 90%. Water doesn’t moisturize the skin by itself and is used in skincare as a solvent for other ingredients. Water ![]() The most used ingredient in skincare. Its concentration defines the product texture: rich creams may have about 50% of water while a light jelly about 90%. Water doesn’t moisturize the skin by itself and is used in skincare as a solvent for other ingredients. | Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. | Formula helper
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9.4 | Azelaic Acid ![]() A powerful dermatological ingredient that helps to treat acne and various pigmentation issues. It appears both in medicated creams and regular skincare. It reduces redness and inflammation but can be irritating in high concentrations. Azelaic Acid ![]() A powerful dermatological ingredient that helps to treat acne and various pigmentation issues. It appears both in medicated creams and regular skincare. It reduces redness and inflammation but can be irritating in high concentrations. | Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. | Anti-Acne Anti-acne agents treat acne blemishes, blackheads, and whiteheads. Anti-Acne Anti-acne agents treat acne blemishes, blackheads, and whiteheads. Soothing Soothing ingredients reduce the signs of sensitivity in irritated and inflamed skin. This includes anti-inflammatory ingredients, anti-itch agents, and topical analgesics. Soothing Soothing ingredients reduce the signs of sensitivity in irritated and inflamed skin. This includes anti-inflammatory ingredients, anti-itch agents, and topical analgesics. Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Antimicrobial Antimicrobials prevent the growth of harmful microorganisms on the skin. Antimicrobial Antimicrobials prevent the growth of harmful microorganisms on the skin. Anti-Seborrheic Anti-seborrheic ingredients help to treat seborrheic dermatitis. Anti-Seborrheic Anti-seborrheic ingredients help to treat seborrheic dermatitis. Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Formula helper
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6.3 | Propanediol ![]() An excellent solvent capable of mixing water with normally water-insoluble ingredients. It also functions as a humectant due to its water-loving alcohol groups. Propanediol can control the viscosity of a product by reducing its thickness. Propanediol ![]() An excellent solvent capable of mixing water with normally water-insoluble ingredients. It also functions as a humectant due to its water-loving alcohol groups. Propanediol can control the viscosity of a product by reducing its thickness. | Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. | Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Formula helper
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0.3 | Caprylhydroxamic Acid ![]() A chelating agent used alongside preservatives in order to boost their antimicrobial activity. Caprylhydroxamic Acid ![]() A chelating agent used alongside preservatives in order to boost their antimicrobial activity. | Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. | Formula helper
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0.3 | 1,2-Hexanediol ![]() A multi-functional formula helper. It is a well-studied preservtive against bacteria and can help pigments and fragrances disperse evenly in a formula. 1,2-Hexanediol ![]() A multi-functional formula helper. It is a well-studied preservtive against bacteria and can help pigments and fragrances disperse evenly in a formula. | Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. | Preservative Preservatives prevent the growth of bacteria and fungi in a product. Preservative Preservatives prevent the growth of bacteria and fungi in a product. Formula helper
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0.3 | | Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. | ||
0.3 | Epilobium Angustifolium Flower/Leaf/Stem Extract ![]() An extract from a plant known in North America as Fireweed and in Europe as Willowherb. It is commonly used in traditional herbal medicine. Due to its abundant content of tannins and flavonoids, it has great astringent and antioxidant properties. Epilobium Angustifolium Flower/Leaf/Stem Extract ![]() An extract from a plant known in North America as Fireweed and in Europe as Willowherb. It is commonly used in traditional herbal medicine. Due to its abundant content of tannins and flavonoids, it has great astringent and antioxidant properties. | Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. | Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Astringent Astringent ingredients provide the skin with a tightened feeling, help to reduce the appearance of large pores, and assist in the healing of small cuts and wounds. Astringent Astringent ingredients provide the skin with a tightened feeling, help to reduce the appearance of large pores, and assist in the healing of small cuts and wounds. | |
0.3 | Glycerin ![]() The most popular moisturizing ingredient in the world. It is a powerful humectant – cheap yet very effective. Glycerin ![]() The most popular moisturizing ingredient in the world. It is a powerful humectant – cheap yet very effective. | Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Animal Ingredients derived from animals (including birds, fish, crustaceans, mollusks, and insects) or produced by animals (e.g. dairy- and egg-derived ingredients, bee products, silk, pearls, etc.) Animal Ingredients derived from animals (including birds, fish, crustaceans, mollusks, and insects) or produced by animals (e.g. dairy- and egg-derived ingredients, bee products, silk, pearls, etc.) | Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Emollient Emollients fill the micro-cracks in the skin and leave it feeling soft and pleasant to the touch. Emollients are often mistakenly perceived as moisturizing ingredients. Emollient Emollients fill the micro-cracks in the skin and leave it feeling soft and pleasant to the touch. Emollients are often mistakenly perceived as moisturizing ingredients. Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Formula helper
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0.3 | Xanthan Gum ![]() A natural multi-functional ingredient that originates from fermented sugars. Xanthan gum acts as a viscosity-building agent to thicken skincare products. It is also an excellent stabilizer and works well to hold other ingredients together. Xanthan Gum ![]() A natural multi-functional ingredient that originates from fermented sugars. Xanthan gum acts as a viscosity-building agent to thicken skincare products. It is also an excellent stabilizer and works well to hold other ingredients together. | Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. | Formula helper
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85 ![]() Water Function: Formula helper Formula helper
Formula helper Formula helper
Origin: Naturally occurring Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. Naturally occurring Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. |
9.4 ![]() Azelaic Acid Function: Anti-Acne, Anti-Acne Anti-acne agents treat acne blemishes, blackheads, and whiteheads. Anti-Acne, Anti-Acne Anti-acne agents treat acne blemishes, blackheads, and whiteheads. Soothing, Soothing Soothing ingredients reduce the signs of sensitivity in irritated and inflamed skin. This includes anti-inflammatory ingredients, anti-itch agents, and topical analgesics. Soothing, Soothing Soothing ingredients reduce the signs of sensitivity in irritated and inflamed skin. This includes anti-inflammatory ingredients, anti-itch agents, and topical analgesics. Anti-Pigmentation, Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Anti-Pigmentation, Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Antimicrobial, Antimicrobial Antimicrobials prevent the growth of harmful microorganisms on the skin. Antimicrobial, Antimicrobial Antimicrobials prevent the growth of harmful microorganisms on the skin. Anti-Seborrheic, Anti-Seborrheic Anti-seborrheic ingredients help to treat seborrheic dermatitis. Anti-Seborrheic, Anti-Seborrheic Anti-seborrheic ingredients help to treat seborrheic dermatitis. Fragrance, Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance, Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Formula helper Formula helper
Formula helper Formula helper
Origin: Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. |
6.3 ![]() Propanediol Function: Moisturizing (Humectant), Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Formula helper Formula helper
Formula helper Formula helper
Origin: Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Biotech, Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. Biotech, Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. |
0.3 ![]() Caprylhydroxamic Acid Function: Formula helper Formula helper
Formula helper Formula helper
Origin: Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. |
0.3 ![]() 1,2-Hexanediol Function: Preservative, Preservative Preservatives prevent the growth of bacteria and fungi in a product. Preservative, Preservative Preservatives prevent the growth of bacteria and fungi in a product. Formula helper Formula helper
Formula helper Formula helper
Origin: Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. |
0.3 ![]() Alpha-Arbutin Function: Antioxidant, Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Antioxidant, Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Anti-Pigmentation Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Anti-Pigmentation Anti-Pigmentation Anti-pigmentation ingredients help to even skin tone by reducing the intensity of dark spots and hyperpigmentation. Origin: |
0.3 ![]() Epilobium Angustifolium Flower/Leaf/Stem Extract Function: Antioxidant, Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Antioxidant, Antioxidant Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging. Astringent Astringent Astringent ingredients provide the skin with a tightened feeling, help to reduce the appearance of large pores, and assist in the healing of small cuts and wounds. Astringent Astringent Astringent ingredients provide the skin with a tightened feeling, help to reduce the appearance of large pores, and assist in the healing of small cuts and wounds. Origin: Botanical Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. |
0.3 ![]() Glycerin Function: Moisturizing (Humectant), Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Moisturizing (Humectant) Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Emollient, Emollient Emollients fill the micro-cracks in the skin and leave it feeling soft and pleasant to the touch. Emollients are often mistakenly perceived as moisturizing ingredients. Emollient, Emollient Emollients fill the micro-cracks in the skin and leave it feeling soft and pleasant to the touch. Emollients are often mistakenly perceived as moisturizing ingredients. Fragrance, Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance, Fragrance Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Formula helper Formula helper
Formula helper Formula helper
Origin: Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic, Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic, Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Animal Animal Ingredients derived from animals (including birds, fish, crustaceans, mollusks, and insects) or produced by animals (e.g. dairy- and egg-derived ingredients, bee products, silk, pearls, etc.) Animal Animal Ingredients derived from animals (including birds, fish, crustaceans, mollusks, and insects) or produced by animals (e.g. dairy- and egg-derived ingredients, bee products, silk, pearls, etc.) |
0.3 ![]() Xanthan Gum Function: Formula helper Formula helper
Formula helper Formula helper
Origin: Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Botanical Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Biotech Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. Biotech Biotech The biotech origin of the ingredient implies that it was made in a lab using cultured microorganisms (bacteria or fungi) and a substrate (e.g. through the fermentation process), and then extracted and/or purified. |