Rare Beauty Perfect Strokes Matte Liquid Liner - Black Versus Physician's Formula Eye Booster Ultra Fine Eyeliner - Blackest Black
Updated on January 15, 2024
Overview
What they are
These products are both vegan, cruelty-free, and reef safe eyeliners. They have a total of 8 ingredients in common
Suited For
They're both likely to be good for dry skin
Free From
They both do not contain any harsh alcohols, common allergens, fragrances, parabens or silicones
What's Inside
They both contain oils and sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Rare Beauty Perfect Strokes Matte Liquid Liner 14 ingredients
Physician's Formula Eye Booster Ultra Fine Eyeliner 18 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Rare Beauty Perfect Strokes Matte Liquid Liner 14 ingredients
Physician's Formula Eye Booster Ultra Fine Eyeliner 18 ingredients
Benefits
Concerns
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningAcrylates/Ethylhexyl Acrylate Copolymer
Propylene Glycol
Humectant
Laureth-21
CleansingAcrylates/Dimethylaminoethyl Methacrylate Copolymer
PEG-40 Hydrogenated Castor Oil
Emulsifying
Phenoxyethanol
Preservative
Sodium Dehydroacetate
Preservative
Sodium Laureth-12 Sulfate
Cleansing
Caprylyl Glycol
EmollientEthylhexylglycerin
Skin ConditioningC11-15 Pareth-7
EmulsifyingButylene Glycol
Humectant
Potassium Sorbate
Preservative
Dextran
Acetyl Tetrapeptide-3
Skin Protecting
Trifolium Pratense Flower Extract
Astringent
CI 77266
Water, Acrylates/Ethylhexyl Acrylate Copolymer, Propylene Glycol, Laureth-21, Acrylates/Dimethylaminoethyl Methacrylate Copolymer, PEG-40 Hydrogenated Castor Oil, Phenoxyethanol, Sodium Dehydroacetate, Sodium Laureth-12 Sulfate, Caprylyl Glycol, Ethylhexylglycerin, C11-15 Pareth-7, Butylene Glycol, Potassium Sorbate, Dextran, Acetyl Tetrapeptide-3, Trifolium Pratense Flower Extract, CI 77266
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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 GlycolWe don't have a description for Laureth-21 yet.
Peg-40 Hydrogenated Castor Oil is derived from castor oil and polyethylene glycol (PEG). It is used as a emollient and emulsifier.
As an emulsifier, it helps prevent ingredients from separating. It also helps make the other ingredients more soluble; it is often used to solubilize fragrances. This increases spreadability and elongates shelf life in a product.
Emollients help soothe and soften the skin. They do 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.
This ingredient may or may not be vegan, depending on the source.
Peg-40 Hydrogenated Castor Oil may not be fungal-acne safe. We recommend speaking with a professional if you have any questions or concerns.
Learn more about PEG-40 Hydrogenated Castor OilPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent 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.
Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Another role of this ingredient is preventing a product from melting or freezing. Propylene glycol also adds antimicrobrial properties to a product, elongating product lifespan.
This ingredient is considered an organic alcohol and commonly added into both cosmetics and foods.
Those with sensitive skin or conditions may develop a rash when using this ingredient.
Learn more about Propylene GlycolThis ingredient is a preservative with antimicrobial properties. It is the sodium salt of dehydroacetic acid.
It is especially effective at preventing bacterial and fungal growth in low concentrations.
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. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterWe don't have a description for CI 77266 yet.
Ingredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Rare Beauty Perfect Strokes Matte Liquid Liner 14 ingredients
Physician's Formula Eye Booster Ultra Fine Eyeliner 18 ingredients
Reviews
Here's what our community thinks
