Here's our complete breakdown comparing the ingredients, attributes, and more of Sunday Riley A+ High-Dose Retinol Serum versus Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment .
Published on August 21, 2022
Overview
Cool Features
They both contain Vitamin E
Suited For
They're both likely to be good for fighting acne, dry skin, brightening skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any common allergens, parabens or sulfates
What's Inside
They both contain harsh alcohols, fragrances and silicones
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Serum
Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.
Facial Treatment
Facial treatments are specially designed to treat a skin concern. Acne treatments and anti-aging products are common examples of facial treatments.
Price
Ingredient Info
Sunday Riley A+ High-Dose Retinol Serum 55 ingredients
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment 46 ingredients
Contains Alcohol
Ingredients in this product that are types of alcohol:
Contains Silicon
Ingredients in this product that are types of silicon:
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Cruelty Free
This product is cruelty-free 🎉
Contains Alcohol
Ingredients in this product that are types of alcohol:
Contains Silicon
Ingredients in this product that are types of silicon:
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Oil Free
This product is free of oils 🎉
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Not Reef Safe
Ingredients in this product that are not reef safe:
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Not Cruelty Free
This product is not cruelty-free 😥
At a glance
Click on any of the items below to learn more
Sunday Riley A+ High-Dose Retinol Serum 55 ingredients
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment 46 ingredients
Notable Ingredients
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Benefits
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Concerns
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Notable Ingredients
This product contains 1 ingredient that may have this attribute:
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Benefits
This product contains 2 ingredients that may have this attribute:
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Concerns
This product contains 2 ingredients that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
Sunday Riley A+ High-Dose Retinol Serum 55 ingredients
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment 46 ingredients
Water • Propanediol • Dimethyl Isosorbide • Triheptanoin • Dimethicone • Glycerin • Pentylene Glycol • Hexyldecanol • Disiloxane • Cetyl Peg/Ppg-10/1 Dimethicone • Diheptyl Succinate • Propylene Carbonate • Hydroxypinacolone Retinoate • Ppg-24-Glycereth-24 • Phenyl Trimethicone • Retinol • Ubiquinone • Honey Extract • Sodium Hyaluronate Crosspolymer • Algae Extract • Zingiber Officinale Extract • Opuntia Ficus-Indica Fruit Extract • Bisabolol • Butyrospermum Parkii Butter • Phospholipids • Saccharomyces Cerevisiae Extract • Lecithin • Sodium Acrylates Copolymer • Hydrogenated Polyisobutene • 1,2-Hexanediol • 4-T-Butylcyclohexanol • Polyglyceryl-10 Stearate • Caprylyl Glycol • Helianthus Annuus Seed Oil • Sorbitol • Cetylhydroxyproline Palmitamide • Polysilicone-11 • Benzoic Acid • Dehydroacetic Acid • Sodium Phytate • Glyceryl Polyacrylate • Polysorbate 80 • Hydroxyphenyl Propamidobenzoic Acid • Stearic Acid • Brassica Campestris Sterols • Pvp • Capryloyl Glycerin/Sebacic Acid Copolymer • Sodium Benzoate • Alcohol • Potassium Phosphate • Decyl Glucoside • Phenoxyethanol • Hexylene Glycol • Potassium Sorbate • Tocopherol
Water • Niacinamide • Isononyl Isononanoate • Dimethyl Isosorbide • Tranexamic Acid • Dimethicone • Propanediol • Pentylene Glycol • Caprylic Acid • Alpha-Arbutin • Glyceryl Stearate • C9-12 Alkane • Cetyl Alcohol • Butyrospermum Parkii Butter • Citric Acid • Kojic Acid • Morus Alba Root Extract • Resveratrol • Scutellaria Lateriflora Extract • Hydrangea Arborescens Root Extract • Squalane • Hydrolyzed Vegetable Protein • Phenoxyethanol • Peg-100 Stearate • Tocopheryl Acetate • Polyacrylate Crosspolymer-6 • Peg-75 Stearate • Ceteareth-20 • Steareth-20 • Silica • Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer • Dimethiconol • Coco-Caprylate/Caprate • Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer • Titanium Dioxide • Sodium Phytate • Diethylhexyl Syringylidenemalonate • Potassium Sorbate • Sodium Benzoate • Polysorbate 60 • Polysorbate 20 • T-Butyl Alcohol • Caprylic/Capric Triglyceride • Caprylyl Glycol • Hexylene Glycol • Sorbitan Isostearate
Ingredients Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 1.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 1.
Propanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.
Propanediol is not likely to cause sensitivity and considered safe to use.
It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 2.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 7.
Dimethyl Isosorbide is a solvent and helps deliver actives into your skin. It is created from sorbitol.
As a solvent, dimethyl isosorbide helps dissolve other ingredients. This helps ensure even distribution of an ingredient. It may also be used to decrease the thickness of a product.
Studies show dimethyl isosorbide is able to penetrate skin to deliver other ingredients into the skin, making them more effective.
Learn more about Dimethyl IsosorbideSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 3.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 4.
Dimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.
Dimethicone has been found increase absorption in skin, boosting the benefits of other ingredients. While there is concern for the safety of dimethicone, the levels used in skincare are safe for use.
Sunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 5.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 6.
Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can help thicken or emulsify a product. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 7.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 8.
Butyrospermum Parkii Butter is a plant lipid from the fruit of the Shea Tree. It is an effective skin hydrator and emollient.
Emollients help soothe and soften your skin. It does this by creating a protective film on your skin. This barrier helps trap moisture and keeps your skin hydrated. Emollients may be effective at treating dry or itchy skin.
Shea butter is rich in antioxidants. Antioxidants help fight free-radicals, or molecules that may harm the body. It is also full of fatty acids including stearic acid and linoleic acid. These acids help replenish the skin and keep skin moisturized.
While Shea Butter has an SPF rating of about 3-4, it is not a sunscreen replacement.
Shea butter may not be fungal acne safe. We recommend speaking with a professional if you have any concerns.
Learn more about Butyrospermum Parkii ButterSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 24.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 14.
Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 33.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 44.
Sodium Phytate is the synthetic salt form of phytic acid. Phytic acid is an antioxidant and can be found in plant seeds.
Sodium Phytate is a chelating agent. Chelating agents help prevent metals from binding to water. This helps stabilize the ingredients and the product.
Sunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 40.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 36.
Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
Sodium Benzoate is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoateSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 48.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 39.
Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent germ and microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Sunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 52.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 23.
Hexylene Glycol is a surfactant. Glycols are a class of alcohols. Hexylene Glycol is a surfactant and emulsifier.
As a surfactant, Hexylene Glycol helps gather dirt and oil on your skin to be washed away.
As an emulsifier, Hexylene Glycol helps keep water and oil together. This prevents them from separating in a product. Hexylene Glycol also thins out the texture of a product by lessening viscosity.
Hexylene Glycol has a small molecular weight.
Learn more about Hexylene GlycolSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 53.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 45.
Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
Potassium sorbate is potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.
Potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.
Potassium sorbate is often used with stronger preservatives.
Learn more about Potassium SorbateSunday Riley A+ High-Dose Retinol Serum contains this as ingredient number 54.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment contains this as ingredient number 38.
Here's what our community thinks of the ingredients in these two products.
Sunday Riley A+ High-Dose Retinol Serum 55 ingredients
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment 46 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Sunday Riley A+ High-Dose Retinol Serum 55 ingredients
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment 46 ingredients
Reviews
Here's what our community thinks
Sunday Riley A+ High-Dose Retinol Serum 55 ingredients
reneelovesherskin
Definitely high-dose retinol!
This is a powerful retinol serum that is no joke. I tried easing into it by going every other night, then moved to...
Definitely high-dose retinol!
This is a powerful retinol serum that is no joke. I tried easing into it by going every other night, then moved to every night. I ended up with signs of a damaged skin barrier (redness) on my chin. I'm going to lay off this on my chin for a couple weeks, then try again, but stick to every other night. I like that I'm getting a strong dose of an excellent skincare ingredient, but I need to take care not to overdo it.
Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment 46 ingredients
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