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Quick Product Notes
(Click on Icons for more information)

Paraben-Free
Sulfate-Free
Alcohol-Free
Silicone-Free
EU Allergen-Free
Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients


Brightening from 3 Ingredient(s):
Glutathione Niacinamide Ascorbic Acid (Vitamin C)

Anti-Aging from 2 Ingredient(s):
Niacinamide Ascorbic Acid (Vitamin C)

Promotes Wound Healing from 2 Ingredient(s):
Panthenol Sodium Hyaluronate

Ingredients Related to Skin Types
Click on the arrow next to the Skin Type! Green = Good & Red = Bad

Dry Skin
6
1
Oily/Acne-Prone Skin
1
Sensitive Skin
1

Ingredient Safety Breakdown (EWG Health Ratings)

  • Low Risk
  • Moderate Risk
  • High Risk
  • Unknown
90%
0%
0%
10%

My Ingredient Notes

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Product Ingredient List

(Showing first 5 of 21 Ingredients)
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Ascorbic Acid (Vitamin C)
(Skin Conditioning, Masking, Fragrance, Antioxidant, Ph Adjuster, Buffering Agent)
Brightening
Brightening
Anti-Aging
Anti-Aging
Good for Dry Skin
Good for Dry Skin
2
Alcohol
(Solvent, Masking, Viscosity Controlling, Antifoaming Agent, Antimicrobial, Astringent)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
Alcohol
Alcohol
1
A
Niacinamide
(Skin Conditioning, Hair Conditioning, Smoothing)
Brightening
Brightening
Anti-Aging
Anti-Aging
3
B
Sodium Lactate
(Humectant, Buffering Agent, Exfoliant, Keratolytic)

Latest User Reviews

(Showing 3 of 4 Reviews)
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I expected more
Skin Type: dry Skin
Skin Concerns: Anti-Aging (Fine lines & Wrinkles), Dehydrated Skin

I feel that it has helped in my routine, but I thought it would have faster results.
I have not had a bad reaction or anything I can complain about, but since it is my first experience with vitamin C, I may not know the correct results so well.
But so far, I've been using it for a few weeks and it's helping in the routine, my skin absorbs quickly and the smell is fake orange juice, it does not bother me too much.
When I finish I will research on other brands and see the long term result to decide if I continue with this or change of brand.

Caused me lots of pimples
Skin Type: combination Skin
Skin Concerns: Post Inflammatory hyperpigmentation (PIH), Anti-Aging (Fine lines & Wrinkles), Fungal Acne (Malassezia), Sensitive Skin, Uneven Skin Tone

i used to use and love the C20 serum and i thought that since they have just rebranded, i would feel the same about this product. i am extremely disappointed that this has caused me severe breakout, several weeks before my wedding! i can't stress this enough-this product made my life miserable. i have clear skin and i only get pimples from time to time. but after using this, it made me break out so much. pimples that have puss in them, which i never had before. i dont know which ingredient made me breakout. will never recommend this product. such a disaster.

Allergic reaction
Skin Type: dry Skin
Skin Concerns: Post Inflammatory hyperpigmentation (PIH), Acne, Blackheads, Large Pores, Dehydrated Skin, Uneven Skin Tone, Whiteheads/Closed Comedones

I've tried both OST C20 and C21.5 and was satisfied with how they made PIH disappear (C20 results were better!). I wanted to try this version but got a severe allergic reaction, my face became red, swollen and was itching so bad (I didn't patch test because I didn't think it'd happen, stupid me!). Make sure to PATCH TEST!! I don't think that I even have a sensitive skin but please make sure to patch test (wow!I said it 3 times!).
P.S. I just noticed some other reviewer had a similar reaction. I'm trying to figure out which ingredient caused it so, If you have any idea, please tell us orz
I gave it 1 star because of the allergic reaction. It may work for you, tough!