Versus

One Thing Peptide Retinal Serum Versus K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng

Serum
Serum
Korean Brand South Korea
Korean Brand South Korea

Updated on April 21, 2025

Overview

What they are

These products are both reef safe serums. They have a total of 23 ingredients in common

Cool Features

They both contain niacinamide, peptides, retinoid and Vitamin C

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 harsh alcohols, common allergens, fragrances, 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

About this product

About this product

At a glance

Click on any of the items below to learn more

Key Ingredients

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Peptide Retinal Serum

Water

Skin Conditioning

Butylene Glycol

Humectant
1 / 0 Helps hydrate Dry Skin Icon

Niacinamide

Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps fight Acne IconHelps brighten skin Icon

Caprylic/Capric Triglyceride

Masking

Dipropylene Glycol

Masking

Cetyl Ethylhexanoate

Emollient

Propanediol

Solvent

Vinyldimethicone

Silicon Icon

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Glyceryl Polymethacrylate

1,2-Hexanediol

Skin Conditioning

Betaine

Humectant
Helps hydrate Dry Skin IconHelps reduce irritation IconGood for Dark Spots Icon

C14-22 Alcohols

Emulsion Stabilising

Cetearyl Olivate

Not safe for Fungal Acne Icon

Glyceryl Stearate

Emollient
1 / 0 Not safe for Fungal Acne Icon

Hydroxyacetophenone

Antioxidant
Antioxidant Icon

Propylene Glycol

Humectant
0 / 0 Helps hydrate Dry Skin IconMay worsen Eczema IconMay worsen Rosacea Icon

Sorbitan Olivate

Emulsifying
Not safe for Fungal Acne Icon

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Emulsion Stabilising

Tromethamine

Buffering

C12-20 Alkyl Glucoside

Emulsifying

Ethylhexylglycerin

Skin Conditioning

Polyacrylate Crosspolymer-6

Emulsion Stabilising

Adenosine

Skin Conditioning
Good for Minimizing Pores IconGood for Scar Healing Icon

Hydrolyzed Gardenia Florida Extract

Antioxidant
Antioxidant Icon

Hydrolyzed Malt Extract

Skin Conditioning

Hydrolyzed Viola Tricolor Extract

Skin Protecting

Sodium Polyacrylate

Absorbent

Dextrin

Absorbent

Disodium EDTA

Sodium Polyacryloyldimethyl Taurate

Emulsion Stabilising

Gardenia Florida Fruit Extract

Skin Conditioning

Hyaluronic Acid

Humectant
Hyaluronic Acid IconHelps with Anti-Aging IconGood for Scar Healing IconHelps brighten skin Icon

Hydrolyzed Hyaluronic Acid

Humectant
Hyaluronic Acid IconHelps with Anti-Aging IconGood for Scar Healing IconHelps brighten skin Icon

Sodium Hyaluronate

Humectant
0 / 0 Hyaluronic Acid Icon

Hydrogenated Polydecene

Emollient

Carbomer

Emulsion Stabilising
1 / 0

Hydrogenated Lecithin

Emulsifying

Polyglyceryl-10 Oleate

Skin Conditioning
Not safe for Fungal Acne Icon

Sodium Lactate

Buffering

Trideceth-10

Cleansing

Palmitoyl Tripeptide-5

Skin Conditioning
Peptide IconHelps with Anti-Aging IconNot safe for Fungal Acne Icon

Polysorbate 20

Emulsifying
0 / 0 Not safe for Fungal Acne Icon

Sodium Ascorbyl Phosphate

Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconGood for Minimizing Pores IconHelps brighten skin Icon

Palmitoyl Tripeptide-1

Skin Conditioning
Peptide IconNot safe for Fungal Acne Icon

Palmitoyl Tetrapeptide-7

Skin Conditioning
Peptide IconHelps with Anti-Aging IconNot safe for Fungal Acne Icon

Copper Tripeptide-1

Skin Conditioning
Peptide IconGood for Skin Texture IconHelps with Anti-Aging Icon

Palmitoyl Pentapeptide-4

Skin Conditioning
Peptide IconHelps with Anti-Aging IconNot safe for Fungal Acne Icon

Acetyl Hexapeptide-8

Humectant
Peptide IconHelps with Anti-Aging Icon

Macadamia Ternifolia Seed Oil

Emollient
Oil IconNot safe for Fungal Acne Icon

Phosphatidylcholine

Emulsifying

Cholesterol

Emollient
0 / 0 Helps hydrate Dry Skin Icon

Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate

Skin Conditioning

Aluminum/Magnesium Hydroxide Stearate

Emulsion Stabilising

Brassica Campestris Sterols

Emollient
Not safe for Fungal Acne Icon

Retinal

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

Potassium Cetyl Phosphate

Emulsifying

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Antioxidant
Antioxidant Icon
Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng

Panax Ginseng Root Extract

Emollient
Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation Icon

Water

Skin Conditioning

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Dipropylene Glycol

Masking

Caprylic/Capric Triglyceride

Masking

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, Masking, Skin Conditioning

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.
  • It has mild preservative properties.

Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.

Smoothing

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
Masking, Skin Conditioning

This ingredient is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.

It helps thicken a product's formula and makes it easier to spread by dissolving clumping compounds.

Caprylic Triglyceride is made by combining glycerin with coconut oil, forming a clear liquid.

While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this.

Learn more about Caprylic/Capric Triglyceride
Masking, Solvent

Dipropylene Glycol is a synthetically created stabilizer and solvent. It is a part of the glycol class in the alcohol family.

Dipropylene Glycol helps dissolve and evenly distribute ingredients. It also helps decrease viscosity and thin out texture.

As a masking agent, Dipropylene Glycol can be used to cover the smell of other ingredients. However, it does not have a scent.

Studies show Dipropylene Glycol is considered safe to use in skincare.

Learn more about Dipropylene Glycol
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, Solvent

1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse. 

It is a:

  • Humectant, drawing moisture into the skin
  • Emollient, helping to soften skin
  • Solvent, dispersing and stabilizing formulas
  • Preservative booster, enhancing the antimicrobial activity of other preservatives 
Humectant, Skin Conditioning

Betaine is a common humectant (a substance that promotes retention of moisture). It's known to be gentle on the skin and can help balance hydration.

This ingredient is best for improving hydration and soothing irritated skin. Studies also show it helps even out skin tone.

Fun fact: Betaine is naturally created in the skin and body. The kind found within cosmetic products can be either plant-derived or synthetic.

Learn more about Betaine
Buffering, Masking

Tromethamine helps balance the pH and improve the texture of a product. It is synthetically created.

As an emulsifier, Tromethamine prevents oil and water ingredients from separating. This helps stabilize the product and elongate a product's shelf life. Tromethamine also makes a product thicker.

Tromethamine helps balance the pH level of a product. Normal pH level of skin is slightly acidic (~4.75-5.5). The acidity of our skin is maintained by our glands and skin biome. Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.

Oral Tromethanmine is an anti-inflammatory drug but plays the role of masking, adding fragrance, and/or balancing pH in skincare.

1,3-Propanediol, 2-amino-2-(hydroxymethyl)-

Learn more about Tromethamine
Skin Conditioning

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.

Skin Conditioning

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

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
Emulsion Stabilising, Gel Forming

Carbomer is a polymer of acrylic acid. Its main role is to create a gel consistency.

A high amount of carbomer can cause pilling or balling up of products. Don't worry, most products contain 1% or less of carbomer.

Emulsifying, Skin Conditioning

Hydrogenated Lecithin is created from the hydrogenation of lecithin (a group of phospholipids). Hydrogenation is a chemical reaction between hydrogen and another element.

This ingredient is an emollient and emulsifier. As an emollient, it helps soften skin by trapping moisture within. As an emulsifier, it prevents oil and water ingredients from separating.

Skin Conditioning

Polyglyceryl-10 Oleate isn't fungal acne safe.

Macadamia Ternifolia Seed Oil is the fixed oil obtained from Macadamia nut.

Macadamia seed oil is rich in fatty acids, including oleic acid (45-75%), palmitoleic acid (7-33%), and palmitic acid (6-12%). They also contain various B vitamins, iron, and magnesium.

Palmitoleic acid has been shown to help soothe inflammation and promote wound healing. It is also naturally found in the fat of our skin.

Macadamia seed oil may not be malassezia folliculitis, or fungal-acne, safe.

Learn more about Macadamia Ternifolia Seed Oil
Emollient, Emulsifying, Skin Conditioning

Cholesterol is a class of organic molecules called lipids. It helps hydrate your skin and is essential to having a healthy skin barrier.

Our skin naturally contains cholesterol in the outermost layer. Besides cholesterol, it also contains ceramides and fatty acids. Cholesterol makes up about 1/4 of your skin's outer layer and barrier. Your skin barrier is responsible for keeping allergens and microbes out. Having a healthy skin barrier is also responsible for keeping your skin firm and plump.

Our bodies use cholestrol to create vitamin D, steroid hormones, and more.

Learn more about Cholesterol

We don't have a description for Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate yet.

We don't have a description for Aluminum/Magnesium Hydroxide Stearate yet.

Emollient, Skin Conditioning

Brassica Campestris Sterols isn't fungal acne safe.

Skin Conditioning

Retinal is a form of retinoid. Retinoids are the gold-standard class of anti-aging ingredients.

Retinal has many benefits as other retinoids: improve skin texture, reduce large pores, reduce the effects of aging, reduce the visibility of dark spots, heal scars, and fight acne.

Studies show retinal may work at a faster rate than retinol due to its structure.

All retinoids have to be converted into retinoic acid before starting to work. Some retinoids take several steps of conversion before binding. Retinal is only one step away, making it more potent.

Like other retinoids, retinal may be irritating. It is best to ease into using this ingredient frequently.

Using the 'ramp up' method, start by using retinol once a week. This gives your skin time to adjust and decrease irritation. Once you feel ready, you can slowly increase the frequency of retinol use.

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

Learn more about Retinal

Potassium Cetyl Phosphate is the potassium salt of a mixture. This mixture consists of the esters from phosphoricacid and cetyl alcohol.

Potassium Cetyl Phosphate is an emulsifier and cleansing agent. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.

As a cleansing agent, Potassium Cetyl Phosphate helps gather oils, dirts, and pollutants from your skin. This makes it easier to rinse them away with water.

Learn more about Potassium Cetyl Phosphate

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate (long name, huh?) is a synthetic antioxidant.

It is used to help stabilize other antioxidants or prevent the color from changing in a product.

As an antioxidant, it helps fight free-radical molecules. Free-radical molecules are capable of damaging our cells and other genetic material. Thus, antioxidants may reduce the signs of aging.

This ingredient is oil-soluble.

Learn more about Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

When to use

298 Routines
4% use in am
96% use in pm
60% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

One Thing Peptide Retinal Serum 58 ingredients

Peptide Retinal Serum hasn't been rated yet.
Rate it now

K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng 41 ingredients

4.3 /5
from 6 ratings
Absorbs Well (6) Works Well (5) No Scent (4)
corissahughes's avatar

Corissa Hughes

11 months ago
Review

Worked almost right away, by smoothing my skin, giving me smaller pores and improved fine lines. Definitely a staple.

#great value
#absorbs well
#light scent
#works well
destiny19's avatar

destiny19

6 months ago
Review

been struggling a lot with closed comedones and acne. this product has helped reduced that and improves texture pretty fast

#absorbs well
#no scent
#works well