Summer Fridays Midnight Ritual Retinol Renewal Serum Versus Sunday Riley Good Genes All-In-One Lactic Acid Treatment

Summer Fridays Midnight Ritual Retinol Renewal Serum Versus Sunday Riley Good Genes All-In-One Lactic Acid Treatment

This anti-aging serum is formulated around Retinyl Linoleate and Retinol to soften the look of wrinkles and refine skin texture.

This smoothing treatment is formulated around Squalane and Lactic Acid to refine skin texture and brighten dull-looking skin.

What's inside

Key Ingredients

No key ingredients

Benefits

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Ingredients Side-by-side

Water

Glycerin

Squalane

Caprylic/Capric Triglyceride

Cetearyl Alcohol

Glyceryl Stearate Se

Simmondsia Chinensis Seed Oil

Propanediol

Sorbitan Stearate

Sclerotium Gum

Retinyl Linoleate

Retinol

Avena Sativa Bran Extract

Centella Asiatica Extract

Niacinamide

Bisabolol

Rosa Canina Fruit Oil

Persea Gratissima Oil

Prunus Amygdalus Dulcis Oil

Butyrospermum Parkii Butter

Sodium Hyaluronate

Ricinus Communis Seed Oil

Hydrogenated Castor Oil

Glycine Soja Oil

Tocopherol

Tocopheryl Acetate

Phytic Acid

Synthetic Beeswax

Copernicia Cerifera Cera

Maltodextrin

Caprylhydroxamic Acid

1,2-Hexanediol

Sodium Benzoate

Potassium Sorbate

Levulinic Acid

Sodium Levulinate

Citric Acid

Sodium Hydroxide

Water, Glycerin, Squalane, Caprylic/Capric Triglyceride, Cetearyl Alcohol, Glyceryl Stearate Se, Simmondsia Chinensis Seed Oil, Propanediol, Sorbitan Stearate, Sclerotium Gum, Retinyl Linoleate, Retinol, Avena Sativa Bran Extract, Centella Asiatica Extract, Niacinamide, Bisabolol, Rosa Canina Fruit Oil, Persea Gratissima Oil, Prunus Amygdalus Dulcis Oil, Butyrospermum Parkii Butter, Sodium Hyaluronate, Ricinus Communis Seed Oil, Hydrogenated Castor Oil, Glycine Soja Oil, Tocopherol, Tocopheryl Acetate, Phytic Acid, Synthetic Beeswax, Copernicia Cerifera Cera, Maltodextrin, Caprylhydroxamic Acid, 1,2-Hexanediol, Sodium Benzoate, Potassium Sorbate, Levulinic Acid, Sodium Levulinate, Citric Acid, Sodium Hydroxide

Opuntia Tuna Fruit Extract

Cypripedium Pubescens Extract

Opuntia Vulgaris Leaf Extract

Agave Tequilana Leaf Extract

Arnica Montana Flower Extract

Aloe Barbadensis Leaf Extract

Saccharomyces Cerevisiae Extract

Leuconostoc/Radish Root Ferment Filtrate

Lactic Acid

PPG-12/Smdi Copolymer

Butylene Glycol

Stearic Acid

Dimethicone

Phenyl Trimethicone

Disiloxane

Ceteareth-20

Glyceryl Stearate

PEG-100 Stearate

Stearyl Glycyrrhetinate

Glycyrrhiza Glabra Root Extract

Cymbopogon Schoenanthus Oil

Potassium Hydroxide

Phenoxyethanol

Xanthan Gum

Caprylyl Glycol

Chlorphenesin

Sodium Phytate

Water, Opuntia Tuna Fruit Extract, Cypripedium Pubescens Extract, Opuntia Vulgaris Leaf Extract, Agave Tequilana Leaf Extract, Arnica Montana Flower Extract, Aloe Barbadensis Leaf Extract, Saccharomyces Cerevisiae Extract, Leuconostoc/Radish Root Ferment Filtrate, Caprylic/Capric Triglyceride, Squalane, Lactic Acid, PPG-12/Smdi Copolymer, Propanediol, Butylene Glycol, Stearic Acid, Dimethicone, Cetearyl Alcohol, Phenyl Trimethicone, Disiloxane, Ceteareth-20, Glyceryl Stearate, PEG-100 Stearate, Stearyl Glycyrrhetinate, Glycyrrhiza Glabra Root Extract, Cymbopogon Schoenanthus Oil, Potassium Hydroxide, Phenoxyethanol, Xanthan Gum, Caprylyl Glycol, Chlorphenesin, Sodium Phytate

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Ingredients Explained

These ingredients are found in both products.

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

Caprylic/Capric Triglyceride (aka MCT Oil) is a lightweight emollient, solvent, and texture enhancer. It is considered a skin-softener by helping to prevent moisture loss.

Though it behaves like an oil, it is not technically one due to its chemical composition. One perk of this ingredient is that it is very stable, resistant to oxidation, and unlikely to go rancid.

In practice, that translates to a long shelf life and a consistently elegant skin feel.

While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this. Just patch test if you have concerns.

Fractionated coconut oil and MCT Oil are both listed as Caprylic/Capric Triglyceride according to INCI. This is because INCI names are based on the ingredient’s final chemical composition and not its marketing name or source.

This ingredient is treated as the gold standard fungal acne safe oil. Even though it is coconut derived, the problematic lauric acid is stripped out.

This leaves just caprylic (C8) and capric (C10) acid. These chain lengths actually trend antifungal; a 2020 study found caprylic acid was enough to disrupt Malassezia furfur cell membrane, with a caprylic acid derivative damaging membrane structures at concentrations as low as 0.2%.

Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.

Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.

It plays several roles in a formula:

Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products.

Multiple assessments have found it to be non-irritating and non-sensitizing to most people.

However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers.

Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy.

Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans.

Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients.

This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize.

A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acne safe.

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.

It’s often used to:

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.

Squalane is the hydrogenated and shelf-stable form of squalene (a lipid that naturally occurs in human sebum).

It is an emollient and skin conditioning agent that is able to integrate seamlessly into the skin's lipid barrier without clogging pores.

This is due to how structurally similar it is to what your skin already produces.

Though it is mostly an emollient that helps soften and hydrate skin, it also has some humectant and occlusive action. Humectants help the skin retain moisture while occlusives seal it in, making squalane a triple-threat moisturizer.

Research shows it has antioxidant capabilities that help protect against stressors like UV exposure, specifically UVA induced oxidative stress. This study also found that it supports collagen biosynthesis in human dermal fibroblasts.

No clinical study has reported significant adverse effects and irritation reactions are very rare from this ingredient (even at 100% concentration).

Overall, it's a fantastic ingredient for hydration and is suitable for all skin types.

This depends on the source. Squalane can be derived from both plants and animals. Most squalane used in skincare comes from plants.

Please note: the source of squalane is only known if disclosed by the brand. We recommend reaching out to the brand if you have any questions about their squalane.

Read more about squalene with an "e".

Though squalane is often called an oil, it’s technically not one. It is a hydrocarbon, meaning it is only made of carbon and hydrogen. True oils are triglycerides and made of fatty acids and glycerol.

The term “oil-free” isn’t regulated so companies can define it however they want. Some exclude all oils, while others just avoid mineral oil or comedogenic oils.

Squalane has a comedogenic rating of 1 from the original 1972 study that tested raw ingredients under occlusion on rabbit ears. This system is not standardized or peer-reviewed, and using the raw ingredients is very different from how diluted cosmetic formulations are used on human skin.

A comedogenic rating of 1 means it is "unlikely to clog pores" according to the original rating system.

The overall formula of a product matters more than the individual ingredients on whether or not it will cause clogged pores.

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. Remember to stay hydrated!

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