# Isntree Hyper Vitamin C23 Serum 20ml

The Original Korean Formula serum from Isntree, 20ml formulated with Ethyl Ascorbyl Ether and Adenosine, shipped from California or direct from Korea.

- Brand: Isntree
- Product: Hyper Vitamin C23 Serum 20ml
- Price: $35.00
- Availability: In stock
- Size: 20 ml
- Market: Korean market, the version sold in Korea
- Made in: Republic of Korea
- EAN (barcode): 8809800940781
- Category: Serums & Ampoules

## Key benefits

- Ethyl Ascorbyl Ether, the vitamin this serum is built around
- Adenosine on the same list, an active
- Ascorbic Acid and Tocopherol on the same list, antioxidants
- Gardenia Florida Fruit Extract on the same list, a plant extract
- Polyglycerin-3 and Hydroxyethyl Urea further down the same list
- Panthenol further down the same list

## How it works

The Hyper Vitamin C23 Serum is a 20ml serum, used after toner and before moisturizer, morning and evening. The vitamin it is built around is Ethyl Ascorbyl Ether, named eighth on its own ingredient list. The same list carries Adenosine, Ascorbic Acid and Tocopherol, so the vitamin is not the only thing on it worth naming. How much of the Ethyl Ascorbyl Ether stays on the skin, and for how long, is decided by the serum format rather than by the list alone. This is the Original Korean Formula, the serum Isntree sells in Korea, Ethyl Ascorbyl Ether and all.

## How to use

1. Start with three drops every other morning and move to daily only once it feels comfortable.
2. Apply after toner on skin that is barely damp, then wait a minute before the next layer.
3. Always finish a morning routine that includes this with sunscreen as the last step.
4. Do not layer it with an exfoliating acid in the same routine, since two sharp products at once is what causes stinging.

## Ingredients

Water, Ascorbic Acid(23%), Propanediol, Betaine, 1,2-Hexanediol, Polyglycerin-3, Tromethamine, Ethyl Ascorbyl Ether, Hydroxyethyl Urea, Betula Platyphylla Japonica Juice, Ethylhexylglycerin, Adenosine, Disodium EDTA, Panthenol, Gardenia Florida Fruit Extract, Dextrin, Tocopherol

## FAQ

### Where does this serum go in my routine?

After toner and before moisturizer, morning and evening. Anything thinner than a serum goes on before it, and anything richer goes on after. If you are adding it to a routine you already like, give it a week on its own first, so what you see is the Ethyl Ascorbyl Ether and not three changes at once.

### Is this the Korean-market serum or a US version?

The Korean-market one, Ethyl Ascorbyl Ether and all. We match this serum to its Korean barcode before it reaches the shelf, which is the check that tells you which market release you are holding.

### What else is on the list besides Ethyl Ascorbyl Ether?

Adenosine, Ascorbic Acid and Tocopherol. The order they are printed in on this serum's panel is the order on the box, so you can see where Ethyl Ascorbyl Ether sits relative to them. Further down the same panel: Gardenia Florida Fruit Extract, Polyglycerin-3 and Hydroxyethyl Urea.

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Page: https://korean-pharmacy.com/products/isntree-hyper-vitamin-c23-serum-20ml