Versus

Biossance Squalane + Retinol Night Serum Versus Sunday Riley A+ High-Dose Retinol Serum

Serum
Serum
American Brand United States
American Brand United States

Overview

What they are

These products are both cruelty-free and reef safe serums. They have a total of 5 ingredients in common

Cool Features

They both contain retinoid and Vitamin E

Suited For

They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive 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 oils

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

Click any item below to learn more and see relevant 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

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
A+ High-Dose Retinol Serum

Water

Skin Conditioning

Propanediol

Solvent
Helps hydrate Dry Skin Icon

Dimethyl Isosorbide

Solvent

Triheptanoin

Skin Conditioning

Dimethicone

Emollient
1 / 0 Silicon Icon

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconGood for Scar Healing IconHelps brighten skin Icon

Pentylene Glycol

Skin Conditioning

Hexyldecanol

Emollient

Disiloxane

Skin Conditioning
Silicon Icon

Cetyl PEG/PPG-10/1 Dimethicone

Emulsifying
Silicon Icon

Diheptyl Succinate

Emollient

Propylene Carbonate

Solvent

Hydroxypinacolone Retinoate

Skin Conditioning
Retinoid IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps fight Acne IconHelps brighten skin Icon

PPG-24-Glycereth-24

Emulsifying

Phenyl Trimethicone

Skin Conditioning
Silicon Icon

Retinol

Skin Conditioning
Retinoid IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps fight Acne IconHelps brighten skin IconMay worsen Rosacea Icon

Ubiquinone

Antioxidant
Antioxidant IconHelps with Anti-Aging IconGood for Dark Spots Icon

Honey Extract

Humectant
Helps hydrate Dry Skin IconHelps with Anti-Aging Icon

Sodium Hyaluronate Crosspolymer

Humectant
Hyaluronic Acid IconHelps hydrate Dry Skin IconGood for Scar Healing Icon

Algae Extract

Emollient
May worsen Oily Skin Icon

Zingiber Officinale Extract

Skin Conditioning

Opuntia Ficus-Indica Fruit Extract

Skin Conditioning

Bisabolol

Masking
Helps reduce Skin Redness IconHelps reduce irritation IconGood for Dark Spots Icon

Butyrospermum Parkii Butter

Skin Conditioning
Helps hydrate Dry Skin IconMay worsen Oily Skin IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Phospholipids

Skin Conditioning
Helps hydrate Dry Skin Icon

Saccharomyces Cerevisiae Extract

Skin Conditioning

Lecithin

Emollient
Helps hydrate Dry Skin Icon

Sodium Acrylates Copolymer

Hydrogenated Polyisobutene

Emollient
1 / 2

1,2-Hexanediol

Skin Conditioning
Helps hydrate Dry Skin Icon

4-T-Butylcyclohexanol

Masking
Fragrance IconHelps reduce Skin Redness IconHelps reduce irritation Icon

Polyglyceryl-10 Stearate

Skin Conditioning
Not safe for Fungal Acne Icon

Caprylyl Glycol

Emollient

Helianthus Annuus Seed Oil

Emollient
0 / 0 Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Sorbitol

Humectant
0 / 0 Helps hydrate Dry Skin Icon

Cetylhydroxyproline Palmitamide

Skin Conditioning

Polysilicone-11

Benzoic Acid

Masking
Preservative IconMay worsen Eczema Icon

Dehydroacetic Acid

Preservative
Preservative Icon

Sodium Phytate

Glyceryl Polyacrylate

Polysorbate 80

Emulsifying
0 / 0 May worsen Oily Skin IconNot safe for Fungal Acne Icon

Hydroxyphenyl Propamidobenzoic Acid

Skin Conditioning

Stearic Acid

Cleansing
2-3 / 0 May worsen Oily Skin IconNot safe for Fungal Acne Icon

Brassica Campestris Sterols

Emollient
Not safe for Fungal Acne Icon

Pvp

Emulsion Stabilising
0 / 0

Capryloyl Glycerin/Sebacic Acid Copolymer

Skin Conditioning

Sodium Benzoate

Masking
Preservative Icon

Alcohol

Antimicrobial
Alcohol IconCan worsen Dry Skin IconMay worsen Oily Skin IconMay cause irritation IconMay worsen Eczema IconMay worsen Rosacea Icon

Potassium Phosphate

Buffering

Decyl Glucoside

Cleansing

Phenoxyethanol

Preservative
Preservative Icon

Hexylene Glycol

Emulsifying
0-2 / 0-1

Potassium Sorbate

Preservative
Preservative Icon

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing Icon

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Skin Conditioning, Solvent

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 Water
Humectant, Skin Conditioning, Skin Protecting

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin
Skin Conditioning

Retinol is a gold-standard ingredient for anti-aging. It is a form of Vitamin A and belongs to the class of retinoids that also includes tretinoin.

Why is retinol famous?

It has the most scientific studies backing up its skin benefits out of all the non-prescription ingredients.

Retinol is proven to:

This is why retinol is effective at removing wrinkles, fading dark spots, treating acne, and reducing the appearance of pores.

Studies show retinol is less effective when exposed to UV. Be sure to look for appropriate packaging to keep your retinol potent (similar to Vitamin C).

Using retinol or any retinoids will increase sun-sensitivity in the first few months. Though studies show retinoids increase your skin's natural SPF with continuous use, it is best to always wear sunscreen and sun-protection.

We recommend speaking with a medical professional about using this ingredient during pregnancy.

Retinol may cause irritation in some people, so be sure to patch test. Experts recommend 'ramping up' retinol use: start using this ingredient once a week and work up to using it daily.

Read about Tretinoin

Learn more about Retinol
Antioxidant, Masking, Skin Conditioning

Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.

Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.

Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.

You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.

There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.

Learn more about Tocopherol
Preservative

Phenoxyethanol 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.

When to use

29 Routines
0% use in am
100% use in pm
72% use every day
When to use See routines that use it ->
159 Routines
4% use in am
96% use in pm
69% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

Biossance Squalane + Retinol Night Serum 23 ingredients

5.0 /5
from 1 rating

Sunday Riley A+ High-Dose Retinol Serum 55 ingredients

5.0 /5
from 1 rating
reneelovesherskin's avatar

reneelovesherskin

2 years ago
Review

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 Show more