# Beauty of Joseon Light On Serum: Centella + Vita C

> Beauty of Joseon Light On Serum: Centella + Vita C pairs 3-O-ethyl ascorbic acid, a stabilised vitamin C derivative, with centella asiatica, panthenol and vitamin E in a fragrance-free 30ml serum launched in August 2023. It cost £14.50 on the brand’s UK-priced store on 25 September 2026.

- Canonical: https://thecastindex.com/beauty/beauty-of-joseon-light-on-serum-centella-vita-c
- Category: Skin prep
- Format: Vitamin C serum
- Finish: Lightweight, non-sticky
- Best for: A fragrance-free vitamin C derivative, morning and night
- Official: https://beautyofjoseon.com/products/light-on-serum-centella-vita-c
- Reviewed: 2026-09-25
- Method: evidence-led desk review of official specifications — not an implied hands-on test

## Should you buy this?

A fragrance-free K-beauty vitamin C with 3-O-ethyl ascorbic acid and centella, used morning and night, at £14.50. The brand does not state the vitamin C percentage, so compare it by format rather than strength.

Skip this if you want pure L-ascorbic acid with a stated strength, or to layer vitamin C with AHA, BHA or PHA exfoliants.

A light, non-sticky vitamin C layer that settles quickly under sunscreen — the K-beauty option in the brightening edit.

## The formula

Light On Serum pairs 3-O-ethyl ascorbic acid — a vitamin C derivative designed to resist oxidation — with centella asiatica, panthenol and vitamin E in a lightweight, non-sticky serum. Beauty of Joseon does not state the vitamin C percentage.

Ethyl ascorbic acid is more stable than L-ascorbic acid but has a smaller research base. The Cast Index treats it as a stable, everyday brightening step rather than a like-for-like alternative to pure vitamin C.

## Who it’s for

Readers who want a fragrance-free vitamin C that can be used morning and night, and anyone starting with vitamin C on a small budget.

## What should you check before buying?

Without a stated concentration, it is hard to compare directly with the percentage-led serums. Avoid layering it with AHA, BHA or PHA exfoliants, as the brand directs, and patch test if your skin is sensitive.

## How to use it

1. After cleansing and toning, apply to face and neck
2. Follow with moisturiser
3. Use morning and night, with sunscreen during the day
4. Do not mix with AHA, BHA or PHA products

## Questions and answers

### What type of vitamin C is in Beauty of Joseon Light On Serum?

3-O-ethyl ascorbic acid, a stabilised vitamin C derivative. The brand does not publish the percentage.

### Can I use Beauty of Joseon Light On Serum twice a day?

Yes. Beauty of Joseon directs morning and evening use, with sunscreen during the day.

### Can I use Light On Serum with exfoliating acids?

The brand advises against mixing it with AHA, BHA or PHA products.

## Explore the category

https://thecastindex.com/beauty/category/skin-prep