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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Numbuzin No.9 Secret Firming Serum versus Numbuzin No. 4 Collagen 73% Pudding Serum .

Published on March 07, 2023

Overview

What they are

These products are both cruelty-free and reef safe serums. They have a total of 14 ingredients in common

Cool Features

They both contain hyaluronic acid, niacinamide and peptides

Suited For

They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, oily skin, reducing pores, scar healing and dark spots

Free From

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

What's Inside

They both contain 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 South Korean Brand South Korea
Serum South Korean Brand South Korea

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 No.9 Secret Firming Serum

Starts at $19.60
Shop

Buy No. 4 Collagen 73% Pudding Serum

Starts at $19.60

Ingredient Info

Click any item below to learn more and view relevant 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

Notable Ingredients

Niacinamide
Hyaluronic Acid
Peptides (2)

Benefits

Hydrating (2)
Good For Oily Skin
Redness Reducing
Reduces Large Pores
Anti-Aging
Dark Spots
Scar Healing
Acne Fighting
Brightening (2)

Concerns

May Worsen Oily Skin (4)
Acne Trigger (2)

Notable Ingredients

Vitamin E
Niacinamide
Hyaluronic Acid (4)
Peptides (3)

Benefits

Hydrating (2)
Good For Oily Skin
Redness Reducing
Skin Texture
Reduces Large Pores
Anti-Aging (3)
Dark Spots
Scar Healing (3)
Acne Fighting
Brightening (4)

Concerns

Drying
Irritating (3)
Rosacea (2)
Eczema (2)
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Ingredients Compared

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

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.

1
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

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 1.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 3.

2
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

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 2.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 5.

3
What it does: Smoothing
Community Rating: Loved

Niacinamide has emerged as an all-star ingredient due to its many benefits.

It is known to treat acne by reducing inflammation. It also helps fade dark-spots and strengthen the skin by promoting the growth of the ceramide barrier.

Other benefits include smoothing wrinkles and minimizing redness.

The cherry on top? Niacinamide can also help build keratin, a protein that keeps skin firm.

When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.

Niacinamide can be mixed with other ingredients to boost benefits. For instance, it has shown to be effective when used with copper, folic acid, and zinc to treat acne.

Learn more about Niacinamide

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 6.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 7.

4
What it does: Humectant, Masking, Skin Conditioning, Solvent
Community Rating: Mixed

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

  • It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
  • It is a humectant, which means that it helps attract moisture into the skin.
  • It helps improve product application.

Overall, Butylene Glycol is a safe and well-rounded ingredient. It is unlikely to irritate skin, and works well with pretty much all other ingredients.

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 8.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 2.

5
What it does:
Community Rating: Liked

This form of hyaluronic acid is produced through fermentation.

According to a manufacturer, it has a positive charge by ionic binding to help moisturize and give hair a smooth feel. This is why you'll find this ingredient in shampoos and body washes.

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 11.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 35.

6
What it does: Skin Conditioning
Community Rating: Liked

Palmitoyl Tripeptide-5 isn't fungal acne safe and is a peptide.

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 13.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 41.

7
What it does: Humectant, Skin Conditioning
Community Rating: Loved

Acetyl Hexapeptide-8 is a peptide. A common name for this peptide is Argireline.

Argireline has a similar function to botox. It prevents muscle movement and contractions. By preventing muscles from moving, Argireline also prohibits the formation of fine lines and wrinkles. However, research is lacking in proving this ingredient to be as effective as botox.

Argireline tells our body to create more collagen. Collagen is a protein that makes connective tissue. Boosting collagen production leads to a healthier skin barrier. Having a healthy skin barrier means having firm and hydrated skin.

Read more about other common types of peptides here:

Learn more about Acetyl Hexapeptide-8

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 14.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 42.

8
What it does: Skin Conditioning
Community Rating: Loved

Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.

Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.

Studies have found adenosine may also help with wound healing.

In skincare products, Adenosine is usually derived from yeast.

Learn more about Adenosine

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 19.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 21.

9
What it does: Emulsifying
Community Rating: Very Disliked

Polyglyceryl-3 Methylglucose Distearate is created from the diester of stearic acid and the condensation product of methylglucose and Polyglycerin-3.

As an emulsifier, it is used to bind ingredients together. Many ingredients, such as oils and water, separate naturally. Emulsifiers prevent them from separating to ensure even consistency in texture.

One of the manufacturer for this ingredient states it is vegetable-based. It is also claimed to be stable at both high and low temperatures.

This ingredient may not be safe for fungal acne. We recommend speaking with a professional if you have any concerns.

Learn more about Polyglyceryl-3 Methylglucose Distearate

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 21.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 11.

10
What it does: Emollient, Emulsifying
Community Rating: Disliked

Glyceryl Stearate is a mix of glycerin and stearic acid.

Glyceryl Stearate is used to stabilize the mixing of water and oil ingredients. By preventing these ingredients from separating, it can help elongate shelf life. It can also help thicken the product's texture.

As an emollient, it helps soften skin and supports barrier-replenishing ingredients.

In cosmetics, Glyceryl Stearate is often made from vegetable oils or synthetically produced. The human body also creates Glyceryl Stearate naturally.

Learn more about Glyceryl Stearate

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 22.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 17.

11
What it does: Emollient, Humectant, Skin Conditioning
Community Rating: Liked

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 Glycol

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 30.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 38.

12
What it does: Skin Conditioning, Solvent
Community Rating: Mixed

1,2-Hexanediol is a multi-tasker ingredient. It acts as a preservative to increase shelf-life and can aid other preservatives in preventing microbe growth. 1,2-Hexanediol also helps the skin retain moisture as a humectant.

In products that are water-based, this ingredient can help stabilize perfumes and fragrances. It can also help make the texture of products softer and more smooth.

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 31.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 4.

13
What it does: Skin Conditioning
Community Rating: Mixed

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 32.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 28.

14
What it does:
Community Rating: Disliked

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA

Numbuzin No.9 Secret Firming Serum contains this as ingredient number 33.

Numbuzin No. 4 Collagen 73% Pudding Serum contains this as ingredient number 22.

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

32% are loved or liked
16% have mixed ratings
51% are disliked or very disliked
0% have no rating yet
51% are loved or liked
28% have mixed ratings
12% 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.

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