The INKEY List Polyglutamic Acid Hydrating Serum Versus Bliss Renew & Smooth Night Serum

See how these products line up with your preferences

Here's our complete breakdown comparing the ingredients, attributes, and more of The INKEY List Polyglutamic Acid Hydrating Serum versus Bliss Renew & Smooth Night Serum .

Published on July 02, 2021

Overview

What they are

These products are both vegan, cruelty-free, and reef safe serums. They have a total of 7 ingredients in common

Suited For

They're both likely to be good for dry skin and brightening skin

Free From

They both do not contain any harsh alcohols, common allergens, parabens or sulfates

What's Inside

They both contain silicones

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.

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The INKEY List Polyglutamic Acid Hydrating Serum

Bliss Renew & Smooth Night Serum

Serum British Brand United Kingdom

Serum American Brand United States

Serum

Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.

Serum

Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.

Price

Shop

Buy Polyglutamic Acid Hydrating Serum

Starts at $15.00

Shop

Buy Renew & Smooth Night Serum

Starts at $22.99

Ingredient Info

Click any item below to learn more and view relevant ingredients.

The INKEY List Polyglutamic Acid Hydrating Serum 25 ingredients

Bliss Renew & Smooth Night Serum 34 ingredients

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

At a glance

Click on any of the items below to learn more

The INKEY List Polyglutamic Acid Hydrating Serum 25 ingredients

Bliss Renew & Smooth Night Serum 34 ingredients

Benefits

Hydrating (2)

Brightening

Concerns

May Worsen Oily Skin

Acne Trigger

Notable Ingredients

AHA

PHA

Vitamin E

Benefits

Hydrating (4)

Good For Oily Skin

Redness Reducing (2)

Reduces Irritation (2)

Skin Texture (2)

Reduces Large Pores (2)

Anti-Aging (4)

Dark Spots (2)

Scar Healing (2)

Acne Fighting

Brightening (3)

Concerns

May Worsen Oily Skin

Irritating (3)

Rosacea (2)

Eczema

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Ingredients Compared

Ingredients that are highlighted in purple are present in both products.

The INKEY List Polyglutamic Acid Hydrating Serum 25 ingredients

Bliss Renew & Smooth Night Serum 34 ingredients

Water • Glycolic Acid • Aloe Barbadensis Leaf Juice • Glycerin • Propanediol • Sodium Hydroxide • Polyacrylate Crosspolymer-6 • Gluconolactone • Saccharum Officinarum Extract • Dipropylene Glycol • Tocopherol • Pyrus Malus Fruit Extract • Citrus Aurantium Dulcis Fruit Extract • Citrus Limon Fruit Extract • Camellia Sinensis Leaf Extract • Glycyrrhiza Glabra Root Extract • Squalane • Salix Nigra Bark Extract • Nymphaea Alba Flower Extract • Helianthus Annuus Seed Oil • Avena Sativa Kernel Oil • Sodium Palmitoyl Proline • Xanthan Gum • Acacia Senegal Gum • Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer • Polyglyceryl-4 Laurate/Succinate • Lauryl Glucoside • Dimethicone • Sodium Citrate • Phenoxyethanol • Potassium Sorbate • Sodium Benzoate • Citric Acid • Parfum

Ingredients Side-by-side

Ingredients that are highlighted in purple are present in both products.

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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.

Water

What it does: Skin Conditioning, Solvent

Community Rating: Loved

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 Water

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 1.

Bliss Renew & Smooth Night Serum contains this as ingredient number 1.

Dimethicone

What it does: Emollient, Skin Conditioning, Skin Protecting

Community Rating: Very Disliked

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.

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 2.

Bliss Renew & Smooth Night Serum contains this as ingredient number 28.

Glycerin

What it does: Humectant, Skin Conditioning, Skin Protecting, Solvent

Community Rating: Loved

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

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 5.

Bliss Renew & Smooth Night Serum contains this as ingredient number 4.

Phenoxyethanol

What it does: Preservative

Community Rating: Very Disliked

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.

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 8.

Bliss Renew & Smooth Night Serum contains this as ingredient number 30.

Propanediol

What it does: Solvent

Community Rating: Liked

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 Propanediol

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 12.

Bliss Renew & Smooth Night Serum contains this as ingredient number 5.

Sodium Benzoate

What it does: Masking, Preservative

Community Rating: Disliked

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 Benzoate

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 14.

Bliss Renew & Smooth Night Serum contains this as ingredient number 32.

Potassium Sorbate

What it does: Preservative

Community Rating: Disliked

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 Sorbate

The INKEY List Polyglutamic Acid Hydrating Serum contains this as ingredient number 18.

Bliss Renew & Smooth Night Serum contains this as ingredient number 31.

Here's what our community thinks of the ingredients in these two products.

The INKEY List Polyglutamic Acid Hydrating Serum 25 ingredients

Bliss Renew & Smooth Night Serum 34 ingredients

28% are loved or liked

20% have mixed ratings

44% are disliked or very disliked

8% have no rating yet

41% are loved or liked

9% have mixed ratings

41% are disliked or very disliked

9% have no rating yet

Usage

Here's some more info on how this product is used by our community.

When to use

The INKEY List Polyglutamic Acid Hydrating Serum 25 ingredients

Bliss Renew & Smooth Night Serum 34 ingredients

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Reviews

Here's what our community thinks

The INKEY List Polyglutamic Acid Hydrating Serum 25 ingredients

4.0 /5

from 2 ratings

Absorbs Well (1) Great Value (1) Hydrating (1) Light Scent (1) Pilling (1) Works Well (1)

Lapaki

2 months ago · Dry Skin

Review

I've been checking out products with Polyglutamic Acid, since it can hold up to four times more moisture than Hyaluronic Acid. The serum smells...

I've been checking out products with Polyglutamic Acid, since it can hold up to four times more moisture than Hyaluronic Acid. The serum smells slightly chemical like many INKEY List products. It is quite good and leaves my dry skin very hydrated and moisturized. Would probably buy it again, if it weren't for the pilling. [Updated: Rating]