PRODUCT REVIEW
Ren Skincare Summer Limited Edition Daily AHA Tonic
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Cheaper alternatives
What can the product work for?
Anti-blemish
What does the product description say?
potassium azeloyl diglycinate
2.1% -
3.1%
Irritation risk:
Concentration: Effectiveness: HIGH
A derivative of azelaic acid. It is obtained by reacting
the chloride of azelaic acid with two molecules of glycine (an amino acid) and potassium hydroxide. It is less studied than azelaic acid, but the available research suggests that it also can be effective in reducing skin redness, hyperpigmentation and blemishes. There are claims that it is more bio-available and more effective than azelaic acid, but no comparison study is available. Potassium azeloyl diglycinate is better soluble in water compared with azelaic acid. Because of this property, products with potassium azeloyl digclycinate can have a nicer texture
Evens skin tone
What does the product description say?
lactic acid
3.4% -
5.1%
Irritation risk:
Concentration: Effectiveness: HIGH
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)
potassium azeloyl diglycinate
2.1% -
3.1%
Irritation risk:
Concentration: Effectiveness: HIGH
A derivative of azelaic acid. It is obtained by reacting
the chloride of azelaic acid with two molecules of glycine (an amino acid) and potassium hydroxide. It is less studied than azelaic acid, but the available research suggests that it also can be effective in reducing skin redness, hyperpigmentation and blemishes. There are claims that it is more bio-available and more effective than azelaic acid, but no comparison study is available. Potassium azeloyl diglycinate is better soluble in water compared with azelaic acid. Because of this property, products with potassium azeloyl digclycinate can have a nicer texture
Exfoliation
What does the product description say?
lactic acid
3.4% -
5.1%
Irritation risk:
Concentration: Effectiveness: HIGH
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)
salix nigra bark extract
0.8% -
1.2%
Irritation risk:
Concentration: Effectiveness:
LOW
A plant extract that might contain salicylic acid
Moisturizing
What does the product description say?
lactic acid
3.4% -
5.1%
Irritation risk:
Concentration: Effectiveness: HIGH
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)
glycerin
0.2% -
0.7%
Irritation risk:
Concentration: Effectiveness: HIGH
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
lactobacillus
1.1% -
1.7%
Irritation risk:
Concentration: Effectiveness: HIGH
A non-living ingredient made by fermentation with the bacteria Lactobacillus. It can help attract water to the upper layer of the skin and might help reduce inflammation
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Anti-aging
lactic acid
3.4% -
5.1%
Irritation risk:
Concentration: Effectiveness:
MEDIUM
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)
Honesty check
How honest is this product?
Promise | Can it deliver? |
---|---|
Exfoliation | |
Evens skin tone | |
Moisturizing | |
Anti-blemish |
Total Promises Fulfilled score:
87/100.
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Can it cause trouble?
- Overall product irritation risk
- Acne & comedogenic risk ingredients: 1
Potential irritants
Comodogenic ingredients
cocos nucifera fruit extract
0.4% -
0.9%
Irritation risk: Comedogenicity: High
Works for:
Moisturizing
An emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic
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Price | |||||||||||
WIMJ similarity score |
71%
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71%
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71%
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70%
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70%
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70%
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69%
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66%
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64%
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64%
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Key ingredients | Common: Other: | Common: Other: | Common: Other: | Common:
Other:
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Irritancy | IRRITANCY
HIGH
| IRRITANCY
MEDIUM
| IRRITANCY
LOW
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MEDIUM
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HIGH
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MEDIUM
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MEDIUM
| IRRITANCY
LOW
| IRRITANCY
HIGH
| IRRITANCY
HIGH
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HIGH
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Potential Irritants |
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Ingredients & concentrations
All ingredients
Key Actives
lactic acid
3.4% -
5.1%
Irritation risk:
Works for:
Evens skin tone,
Exfoliation,
Moisturizing,
Anti-aging
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)
lactobacillus ferment
2.7% -
4%
Irritation risk:
Works for:
Moisturizing,
Anti-oxidation,
Anti-inflammatory,
Reduces irritation
A fermentation product created by bacteria Lactobacillus. The fermented product has anti-bacterial properties and might be helpful in calming down inflammation, but studies are lacking. Helps attract water to the upper layer of the skin. Can be used as a preservative
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Potential irritants
parfum
0.1% -
0.3%
Irritation risk:
An aromatic blend of unspecified and possibly irritating ingredients
limonene
0.05% -
0.1%
Irritation risk:
A common frangrance that can easily irritate skin, especially if exposed to air, light or heat
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Comodogenic ingredients
cocos nucifera fruit extract
0.4% -
0.9%
Irritation risk: Comedogenicity: High
Works for:
Moisturizing
An emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic
All ingredients
lactic acid
3.4% -
5.1%
Irritation risk:
Works for:
Evens skin tone,
Exfoliation,
Moisturizing,
Anti-aging
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
Ingredient list view
Water, Polysorbate 20, Lactic acid, Lactobacillus ferment, Potassium azeloyl diglycinate, Sodium hydroxide, Ethylhexylglycerin, Lactobacillus, Levulinic acid, Salix nigra bark extract, Cucumis sativus fruit extract, Sodium benzoate, Cocos nucifera fruit extract, Caprylic/capric triglyceride, Glycerin, Sodium levulinate, Parfum, Citric acid, Potassium sorbate, Limonene, Linalool
Sources
- Epidermal and dermal effects of topical lactic acid
- Dual Effects of Alpha-Hydroxy Acids on the Skin
- The effect of probiotics on immune regulation, acne, and photoaging
- Comparison of clinical and histological effects between lactobacillus-fermented Chamaecyparis obtusa and tea tree oil for the treatment of acne: an eight-week double-blind randomized controlled split-face study
- Use of Probiotics for Dermal Applications
- Clinical and instrumental assessment of the effects of a new product based on hydroxypropyl chitosan and potassium azeloyl diglycinate in the management of rosacea
- A Preliminary Clinical Evaluation of a Topical Product for Reducing Slight Rosacea Imperfections
- Azeloyl-Glycine: A new active in skin disequilibrium
- Formulation and evaluation of the cream made from potassium azeloyl diglycinate as an anti-aging