PRODUCT REVIEW
Kerstin Florian Clarifying Probiotic Refining Serum
Buy from Amazon US $79.00
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Price as of 2/11/2023 1:33 GMT.
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What can the product work for?
Moisturizing
What does the product description say?
Advanced , natural retexturizing formula improves clarity, function, and tone as it harmonizes the skin’s microbiome.
saccharomyces/xylinum/black tea ferment
0.55% -
0.85%
Irritation risk:
Concentration: Effectiveness: HIGH
A fermented sweet black tea. There is no studies on particular benefits of this ingredient in skin. It can help attract water to the upper layer of the skin, and might have some anti-oxidant effect. It is used in skincare for mostly marketing purposes because of the popularity of kombucha drinks
zinc pca
0.25% -
0.45%
Irritation risk:
Concentration: Effectiveness: HIGH
A compound that combines zinc with a hydrating ingredient PCA. Might to be helpful against acne and clogged pores. Can help calm down inflammation in skin. Could be helpful in reducing the formation of free radicals in skin. Might help to reduce fine lines in wrinkles, but solid evidence is missing
superoxide dismutase
0.25% -
0.5%
Irritation risk:
Concentration: Effectiveness: HIGH
An antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants
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Anti-aging
glycolic acid
0.45% -
0.7%
Irritation risk:
Concentration: Effectiveness: HIGH
An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid
copper gluconate
1.1% -
1.3%
Irritation risk:
Concentration: Effectiveness:
LOW
Typically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing
zinc pca
0.25% -
0.45%
Irritation risk:
Concentration: Effectiveness:
LOW
A compound that combines zinc with a hydrating ingredient PCA. Might to be helpful against acne and clogged pores. Can help calm down inflammation in skin. Could be helpful in reducing the formation of free radicals in skin. Might help to reduce fine lines in wrinkles, but solid evidence is missing
Show more
Evens skin tone
glycolic acid
0.45% -
0.7%
Irritation risk:
Concentration: Effectiveness: HIGH
An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid
copper gluconate
1.1% -
1.3%
Irritation risk:
Concentration: Effectiveness:
LOW
Typically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing
lactic acid
0.45% -
0.65%
Irritation risk:
Concentration: Insufficient!
An exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)
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Exfoliation
glycolic acid
0.45% -
0.7%
Irritation risk:
Concentration: Effectiveness: HIGH
An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid
copper gluconate
1.1% -
1.3%
Irritation risk:
Concentration: Effectiveness:
LOW
Typically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing
lactic acid
0.45% -
0.65%
Irritation risk:
Concentration: Insufficient!
An exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)
Show more
Anti-oxidation
superoxide dismutase
0.25% -
0.5%
Irritation risk:
Concentration: Effectiveness: HIGH
An antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants
chlorella vulgaris extract
1.9% -
2.3%
Irritation risk: Comedogenicity: High
Concentration: Effectiveness:
LOW
A plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory properties
ascophyllum nodosum extract
0.5% -
0.7%
Irritation risk:
Concentration: Effectiveness:
LOW
Brown seaweed extract. Can help attract water to the upper layer of the skin and might have some antioxidant effect
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Honesty check
How honest is this product?
| Promise | Can it deliver? |
|---|---|
| Moisturizing |
Total Promises Fulfilled score:
75/100.
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Can it cause trouble?
- Overall product irritation risk
- Acne & comedogenic risk ingredients: 4
Potential irritants
glycolic acid
0.45% -
0.7%
Irritation risk:
Works for:
Anti-aging,
Exfoliation,
Evens skin tone,
Anti-blemish
An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid
rosa damascena extract
0.3% -
0.55%
Irritation risk:
Oil of a very fragrant pink rose used as fragrance in cosmetics. Extensive research has shown it has mixed benefits. In the pro column, inhaling this flower’s scent seems to have relaxing properties and the plant’s petals contain skin-soothing and antioxidant compounds that can benefit skin. On the flipside, the numerous chemicals that create this rose’s distinctive fragrance pose a risk of causing skin aggravation.
Show more
Comodogenic ingredients
plankton extract
2.3% -
2.8%
Irritation risk: Comedogenicity: High
Works for:
Moisturizing
Can help attract water to the upper layer of the skin
chlorella vulgaris extract
1.9% -
2.3%
Irritation risk: Comedogenicity: High
Works for:
Moisturizing,
Anti-inflammatory,
Anti-oxidation
A plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory properties
Show more
User reviews (0)
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Ingredients & concentrations
All ingredients
Key Actives
niacinamide
0.9% -
1.1%
Irritation risk:
Works for:
Anti-aging,
Evens skin tone,
Moisturizing,
Anti-blemish,
Reduces irritation,
Antibacterial,
Reduces redness,
Anti-inflammatory
Is proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture.
The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production
copper gluconate
1.1% -
1.3%
Irritation risk:
Works for:
Moisturizing,
Evens skin tone,
Anti-blemish,
Exfoliation,
Anti-oxidation,
Anti-aging
Typically used to stabilize the product formulations. It is a salt of polyhydroxy acid (PHA) and in larger concentrations, can help shed the dead cells from the skin surface revealing smoother skin. It can help attract water to the upper layer of the skin. Might to be helpful against acne and clogged pores. Could be helpful in neutralizing free radicals, but solid research is missing
Show more
Potential irritants
glycolic acid
0.45% -
0.7%
Irritation risk:
Works for:
Anti-aging,
Exfoliation,
Evens skin tone,
Anti-blemish
An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid
rosa damascena extract
0.3% -
0.55%
Irritation risk:
Oil of a very fragrant pink rose used as fragrance in cosmetics. Extensive research has shown it has mixed benefits. In the pro column, inhaling this flower’s scent seems to have relaxing properties and the plant’s petals contain skin-soothing and antioxidant compounds that can benefit skin. On the flipside, the numerous chemicals that create this rose’s distinctive fragrance pose a risk of causing skin aggravation.
Show more
Comodogenic ingredients
plankton extract
2.3% -
2.8%
Irritation risk: Comedogenicity: High
Works for:
Moisturizing
Can help attract water to the upper layer of the skin
chlorella vulgaris extract
1.9% -
2.3%
Irritation risk: Comedogenicity: High
Works for:
Moisturizing,
Anti-inflammatory,
Anti-oxidation
A plant extract that can help to attract water to the upper layer of the skin and might have some anti-oxidant and anti-inflammatory properties
Show more
All ingredients
propanediol
4.5% -
5.4%
Irritation risk:
Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin
lactobacillus ferment lysate
4% -
4.9%
Irritation risk:
Works for:
Moisturizing
A "broth" with parts of dead cells of lactobacteria. Might be helpful supporting diverse microbiome in skin, but evidence is lacking
Show more
Ingredient list view
Water, Propanediol, Lactobacillus ferment lysate, Pentylene glycol, Plankton extract, Chlorella vulgaris extract, Caprylyl/capryl glucoside, Oryza sativa extract, Copper gluconate, Niacinamide, Allantoin, Saccharomyces/xylinum/black tea ferment, Rosa canina fruit extract, Ascophyllum nodosum extract, Glycolic acid, Lactic acid, Leuconostoc ferment filtrate, Ulva lactuca extract, Spirulina maxima extract, Emblica officinalis seed extract, Terminalia chebula extract, Rosa damascena extract, Zinc pca, Magnesium gluconate, Carrageenan, Arginine, Glycerin, Superoxide dismutase, Soybean peroxidase, Sodium citrate, Biotin, Glycerin, Sodium magnesium silicate, Butylene glycol, Hydroxyethylcellulose, Xanthan gum, Sodium phytate, Cellulose gum, Potassium sorbate, Potassium hydroxide, Sodium benzoate, Benzoic acid, Citric acid, Parfum, Limonene, Parfum, Mentha arvensis leaf oil, Citrus limon peel oil, Lavandula hybrida oil, Mentha piperita oil
Sources
- Antioxidant and Anti-Inflammatory Properties of Anthocyanins Extracted from Oryza sativa L. in Primary Dermal Fibroblasts
- Rice antioxidants: phenolic acids, flavonoids, anthocyanins, proanthocyanidins, tocopherols, tocotrienols, c-oryzanol, and phytic acid
- Applications of hydroxy acids: classification, mechanisms, and photoactivity
- Niacinamide - mechanisms of action and its topical use in dermatology
- Gehring, W. (2004). Nicotinic acid/niacinamide and the skin. Journal of Cosmetic Dermatology, 3(2), 88–93. doi:10.1111/j.1473-2130.2004.00115.x
- Profile of wound healing process induced by allantoin
- Photoprotective and antiinflammatory effects of topical glycolic acid
- Glycolic acid peel therapy – a current review
- Dual Effects of Alpha-Hydroxy Acids on the Skin
- Epidermal and dermal effects of topical lactic acid
- Dual Effects of Alpha-Hydroxy Acids on the Skin
- Zinc L-pyrrolidone carboxylate inhibits the UVA-induced production of matrix metalloproteinase-1 by in vitro cultured skin fibroblasts, whereas it enhances their collagen synthesis
- Zinc Therapy in Dermatology: A Review
- Glycerol and the skin: holistic approach to its origin and functions
- A novel efficient and safe treatment for atopic dermatitis: Topical superoxide dismutase (SOD).
- Novel topical agent containing superoxide dismutase 100 000 IU and 4% of plant extracts as a mono-therapy for atopic dermatitis
- Copper/Zinc Superoxide Dismutase in Human Skin: Current Knowledge
- Photoprotective Effect of Topically Applied Superoxide Dismutase on Sunburn Reaction in Comparison with Sunscreen
- The role of superoxide dismutase (SOD) in skin disorders
- Topical formulations with superoxide dismutase: Influence of formulation composition on physical stability and enzymatic activity