Versus

Isntree Hyper Vitamin C 23 Serum Versus Tirtir Pure Vitamin C24 Serum

Serum
Serum
Korean Brand South Korea
Korean Brand South Korea

Updated on May 21, 2024

Overview

What they are

These products are both cruelty-free, fungal acne (malassezia) safe, and reef safe serums. They have a total of 5 ingredients in common

Cool Features

They both contain Vitamin C

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, reducing pores, scar healing, dark spots and better texture

Free From

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

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

Key Ingredients

Benefits

Ingredients Side-by-side

found in both products

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
Antioxidant, Buffering, Masking

Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.

Not only is vitamin C great for your overall health and immune system, it also has plenty of benefits on your skin.

Vitamin C is best used for brightening skin. It improves dark spots, acne scars, and hyperpigmentation. This is because it blocks the process of skin darkening when exposed to UV.

Remember: Vitamin C should not replace sunscreen!

Your skin uses vitamin C to build collagen. Collagen is one key component in having a strong skin barrier and plump skin. Vitamin C also plays a role in regulating collagen, thus making it effective in improving wrinkles and fine lines.

Ascorbic acid shows potent antioxidant activity. As an antioxidant, it helps fight free-radicals. Free-radicals are molecules that may damage your skin cells. These antioxidants also protect skin against UV damage.

The best formulations include Vitamin E and/or ferulic acid. These two ingredients help stabilize and provide a boost in the benefits of ascorbic acid. This is because ascorbic acid becomes unstable when exposed to UV and air. In fact, you can tell your ascorbic acid has oxidized when it turns an orange-yellow color.

Ascorbic acid is generally compatible with other ingredients. However, using ascorbic acid with other active ingredients might cause irritation. Two ingredients: copper ions and benzoyl peroxide, will inactivate ascorbic acid completely.

Read more about other types of Vitamin C:

Foods rich with vitamin C include oranges, strawberries, broccoli, bell peppers, and more. When consuming Vitamin C, your skin receives a portion of the nutrients.

Learn more about Ascorbic Acid
Solvent

Another all-star ingredient is propanediol. Propanediol 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.

Learn more about Propanediol
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
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 

When to use

105 Routines
81% use in am
19% use in pm
82% use every day
When to use See routines that use it ->
105 Routines
77% use in am
22% use in pm
88% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

Isntree Hyper Vitamin C 23 Serum 17 ingredients

5.0 /5
from 4 ratings
Works Well (3) Absorbs Well (3) Great Value (2)
Lapaki's avatar

Lapaki

10 months ago
Review

I've reintroduced this powerful vitamin C serum back into my routine because my hyperpigmentation has re-emerged. After only a few weeks of use, the dark spots and uneven skin tone have already faded and are much less visible.

Gradually increasing the vitamin C concentration in my routine, I've tried various other serums before - this one is the most effective so far. I'm not sure if I should Show more

#great value
#light
#absorbs well
#no scent
ChienYun_CY's avatar

Chien Yun Ang

1 year ago
Review

No irritation, no weird smell
I switched from Cosrx's Vitamin C 23 serum to this. I prefer this to Cosrx. It has no smell, no irritation and gentle to my skin. If you are a fan of Cosrx Vitamin C serum (but loathe the smell), you may want to try this too.

Tirtir Pure Vitamin C24 Serum 18 ingredients

4.3 /5
from 3 ratings
Absorbs Well (1) Light (1) Light Scent (1)
Ilyouko's avatar

Alisa

4 months ago
Review

Oh my gosh. This product is genuinely so amazing. I was first introduced to it by an influencer thats very acne prone named brute choi and im SO glad i was influenced. Not only is it NOT COMEDOGENIC ANNND FUNGAL ACNE SAFE but also works wonders on the skin??? To be dead serious, i used this product with no expectations after trying the Axis-y dark spot serum because that one took a fat while to Show more

#light
#absorbs well
#works well
zedisdead's avatar

Zed Isdead

2 months ago
Review

It’s not a bad vitamin c - it doesn’t smell bad or sting my sensitive skin. It does leave a weird texture on my face though, like I’ve applied an oil or something. Odd.

#sticky
#light scent