Dr. Idriss Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin
Works for
MoisturizingGlycerin, Potassium azeloyl diglycinate + 10 moreWorks
“The Reducer Serum is sensitive-skin friendly and fragrance-free, containing two cartridges to ensure the highest level of formula freshness.”
This product can help improve hydration of the skin with the two types of ingredients.
The first type is called “humectants”:
these ingredients help attract water.
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. The following ingredients in this product do the job:
glycerin, butylene glycol.
This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: butyrospermum parkii butter, caprylic/capric triglyceride.
Anti-oxidationSide benefit · Azelaic acid, Glycyrrhetinic acid + 4 moreWorks well
This product contains antioxidants (azelaic acid, glycyrrhetinic acid) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).
Evens skin toneSide benefit · Potassium azeloyl diglycinate, Azelaic acid + 1 moreWorks well
This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: azelaic acid, potassium azeloyl diglycinate
The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually can help even out the skin tone: glycyrrhetinic acid.
Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.
Anti-blemishSide benefit · Azelaic acid, Potassium azeloyl diglycinate + 1 moreWorks well
This product can help reduce breakouts and clogged pores because it contains the following ingredient: azelaic acid. This ingredient is used for treating acne and can have a noticeable effect.
In addition, this product contains potassium azeloyl diglycinate. It can help in reducing blemishes, even though it is less effective.
Anti-agingSide benefit · Butyrospermum parkii butter, Ascorbyl palmitateMay help
This product contains azelaic acid, glycyrrhetinic acid. These ingredients help neutralize free radicals in skin. By doing so, they might be able to prevent early signs of aging (like fine lines and wrinkles), at least to some extent. These ingredients will not be able to "reverse" signs of aging.
Can it cause trouble?
Irritancy11 flagged ingredientsMedium risk
Comedogenic2 ingredients rated 2 or more on the 0–5 pore-clogging scale2 flagged
User reviews
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Ingredients
Filter by role to see what each ingredient is doing.
Water~40–60%
Glycerin~3.8–5.7%
- Irritation risk
- Low
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
More about GlycerinPropanediol~3.3–5%
- Irritation risk
- Low
Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin
More about PropanediolPotassium azeloyl diglycinate~2.7–4%
- Irritation risk
- Low
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
More about Potassium azeloyl diglycinateAzelaic acid~2–3%
- Irritation risk
- Low
Is produced by a yeast that lives on normal human skin. It is used in medicine as a topical treatment for mild to moderate acne. It has a mild exfoliating effect. It can also help reduce hyperpigmentation, helps calm down inflammation and can help neutralize free radicals
More about Azelaic acidPentylene glycol~1.7–2.5%
- Irritation risk
- Medium
Used to preserve products, dissolve other ingredients and create a nice product texture
More about Pentylene glycolCaprylic/capric triglyceride~1.4–2.1%
- Irritation risk
- Medium
A good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin
More about Caprylic/capric triglycerideButyrospermum parkii butter~1.3–1.9%
- Irritation risk
- Low
- Comedogenicity
- 3/5
A great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals
More about Butyrospermum parkii butterDipropylene glycol~0.95–1.45%
- Irritation risk
- Low
Helps to dissolve other ingredients in a formulation. Slows down the rate of product drying
More about Dipropylene glycolCetearyl olivate~0.6–1.35%
Cetyl alcohol~0.55–1.25%
- Irritation risk
- Low
A non-drying alcohol that works to soften the skin and stabilize product formulations helping oil and water mix together
More about Cetyl alcoholSorbitan olivate~0.4–0.9%
Sodium acrylate/sodium acryloyldimethyl taurate copolymer~0.35–0.85%
- Irritation risk
- Low
Used to create a thicker product consistency
More about Sodium acrylate/sodium acryloyldimethyl taurate copolymerDimethicone~0.35–0.8%
- Irritation risk
- Low
A silicone that helps to reduce water loss from the surface of the skin. Can temporarily "fill in" lines and wrinkles, absorb oil, and create a nice product finish
More about DimethiconeSodium hydroxide~0.2–0.7%
Glycyrrhetinic acid~0.2–0.7%
- Irritation risk
- Medium
Active compound of licorice root. Works to calm down inflammation, as an anti-oxidant, and might be helpful in lightening the skin and reducing hyperpigmentation
More about Glycyrrhetinic acidHydroxyphenyl propamidobenzoic acid~0.15–0.7%
- Irritation risk
- Low
Might help to reduce inflammation in skin, but solid research is lacking
More about Hydroxyphenyl propamidobenzoic acidSalix alba bark extract~0.15–0.6%
- Irritation risk
- High
A plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect
More about Salix alba bark extractApricot kernel oil polyglyceryl-6 esters~0.15–0.65%
Proline~0.15–0.55%
Magnolol~0.1–0.5%
- Irritation risk
- Low
Honokiol~0.1–0.4%
- Irritation risk
- Low
Sodium phytate~0.1–0.4%
Ascorbyl palmitate~0.1–0.35%
- Irritation risk
- Medium
Being a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.
More about Ascorbyl palmitateBisabolol~0.1–0.3%
- Irritation risk
- Low
An active component of chamomile plant that historically has been used to calm down irritated skin. A recent study shows that bisabolol indeed can have some anti-inflammatory effect on skin, even though conclusive data is lacking. Bisabolol has a sweet floral scent and can be added to products for its aromatic properties
More about BisabololCapryloyl glycine~0.15–0.55%
- Irritation risk
- Low
Helps oil and water mix together, preserve cosmetic products, and attract water to the upper layer of the skin
More about Capryloyl glycineEthylhexylglycerin~0.1–0.3%
Butylene glycol~0.05–0.3%
- Irritation risk
- Low
Used to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin
More about Butylene glycolSorbitan oleate~0.1–0.3%
- Irritation risk
- Medium
- Comedogenicity
- 2/5
Helps oil and water mix together
More about Sorbitan oleatePolyglyceryl-6 caprylate~0.1–0.35%
- Irritation risk
- Medium
Helps oil and water mix together
More about Polyglyceryl-6 caprylateXanthan gum~0.1–0.3%
- Irritation risk
- Low
Used to create a thicker product consistency
More about Xanthan gumPolysorbate 80~0.1–0.35%
Polyglyceryl-10 oleate~0.1–0.3%
- Irritation risk
- Low
Helps soften the upper layer of the skin
More about Polyglyceryl-10 oleateIsohexadecane~0.15–0.5%
- Irritation risk
- Low
Improves the texture of the product and helps soften the skin. Helps oil and water mix together and can be used as a cleansing agent
More about IsohexadecaneSorbitan palmitate~0.05–0.25%
- Irritation risk
- Medium
Helps water and oil mix together and stabilize the product formulation
More about Sorbitan palmitateSodium bicarbonate~0.1–0.4%
Phenoxyethanol~0.05–0.15%
- Irritation risk
- Low
A preservative. It helps prevent bacterial growth in cosmetic products
More about PhenoxyethanolCi 19140~0.01–0.05%
Ci 42090~0.01–0.05%
Ingredient list view
Water, Glycerin, Propanediol, Potassium azeloyl diglycinate, Azelaic acid, Pentylene glycol, Caprylic/capric triglyceride, Butyrospermum parkii butter, Dipropylene glycol, Cetearyl olivate, Cetyl alcohol, Sorbitan olivate, Sodium acrylate/sodium acryloyldimethyl taurate copolymer, Dimethicone, Sodium hydroxide, Glycyrrhetinic acid, Hydroxyphenyl propamidobenzoic acid, Salix alba bark extract, Apricot kernel oil polyglyceryl-6 esters, Proline, Magnolol, Honokiol, Sodium phytate, Ascorbyl palmitate, Bisabolol, Capryloyl glycine, Ethylhexylglycerin, Butylene glycol, Sorbitan oleate, Polyglyceryl-6 caprylate, Xanthan gum, Polysorbate 80, Polyglyceryl-10 oleate, Isohexadecane, Sorbitan palmitate, Sodium bicarbonate, Phenoxyethanol, Ci 19140, Ci 42090
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Worth comparing, line by line.
Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.
| Dr. IdrissLeft Un-Red Reducer Face Serum for Redness and Blemish Prone SkinYOUR PRODUCT | Dr. IdissLeft Un-Red Reducer Serum | Biodroga MD10% Azelaic Skin Booster Serum | SKIN 1004.Azelaic Acid 10 Ampoule | |
|---|---|---|---|---|
| Match | — | 100% | 91% | 87% |
| Price | $68.00 | — | — | $21.60−$46.40 |
| Shared key ingredients | — | 7 of 7 | 3 of 7 | 3 of 7 |
| Key difference | — | — | — | Panthenol |
| Irritancy | Medium | Medium | Low | Low |
| Drying alcohol | — | — | — | — |
| View product | Shop | Shop | Shop |
More alternatives: Mario Badescu Clarifying SerumNEORETIN | Discrom control Pigment Neutralizer Serum | Cantabria Labs
Sources cited in this review
Every concentration estimate and effectiveness label is anchored to one of these 15 studies and safety reviews.
- 1
- 2
- 3
- 4Azeloyl-Glycine: A new active in skin disequilibriumresearchgate.net
- 5
- 6
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