# Brightening serum for oily winter skin: HEEDA Glutathione Serum

- By Chabun (https://superchart.com/en/@out-and-back/)
- Written Jan 13, 2026
- Updated Sep 11, 2026
- Products › Beauty products
- Product provided: I received this product and used it for two weeks.
- English edition: https://superchart.com/en/@out-and-back/heeda-glutathione-oily-skin-winter-serum/
- Also in: [한국어](https://superchart.com/ko/@out-and-back/heeda-glutathione-oily-skin-winter-serum/index.md)

## In short

HEEDA Glutathione Brightening Serum is a Korean brightening serum I used for two weeks on oily skin during winter. It absorbed lightly with little shine, and my skin tone and faint dark spots looked less noticeable, though they did not disappear completely.

## Good to know

- **Product**: HEEDA Glutathione Brightening Serum
- **Test period**: 2 weeks
- **Skin type and season**: Oily skin, winter
- **How I used it**: 1–2 pumps after toner, following cleansing
- **Where to buy**: Search “HEEDA serum” on Coupang

*Prices as written by the tester on Jan 13, 2026 · not updated automatically*

## Why I used it on oily skin in winter

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-01-15slx-1200.webp)

In winter, my skin felt dry on the surface but oily underneath, and I noticed both inner dryness and dullness after cleansing. I worry that oily products may cause breakouts, so I chose this serum while looking for something lightweight.

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-02-wc4ss-900.webp)

## Texture and finish

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-03-hjun8-900.webp)

When dispensed onto the back of my hand, it had a thin, lightweight water-glow texture. It spread over my skin with a moisturizing fit and absorbed quickly without leaving the surface overly shiny. It felt minimally sticky, heavy, or stuffy.

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-04-d96rw-900.webp)

## How I used it

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-05-1nspd-900.webp)

After cleansing, I used 1–2 pumps over my entire face after toner. Even when I layered it, it did not pill, and it felt light enough to use before makeup in the morning. At night, my skin felt comfortable when I used it before cream.

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-06-zxsn4-900.webp)

## How did my skin tone and dark spots look after two weeks?

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-07-1fhz2-900.webp)

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-08-1ufk8-900.webp)

After two weeks, my skin looked less dull and slightly clearer when I looked in the mirror after cleansing. Rather than my skin becoming white, it seemed more transparent because my overall skin condition looked more balanced.

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-09-ytas2-900.webp)

The faint hyperpigmentation on my cheeks and chin also looked less noticeable than before. It did not disappear completely in a short time, but I used less concealer when doing my makeup, and my bare skin tone felt a little more even.

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-10-1kmcm-900.webp)

## What suited oily skin in winter

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-11-102ks-900.webp)

Instead of an oily shine, I liked the moisturized look that seemed to softly come from within my skin. I reached for it on days when my skin looked rough in winter or foundation separation concerned me, but I wanted to avoid heavy moisture.

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-12-w321o-900.webp)

## Who might it suit?

![Brightening serum for oily winter skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-oily-skin-winter-serum/heeda-glutathione-oily-skin-winter-serum-13-13089-900.webp)

- People with oily skin concerned about inner dryness in winter
- Those looking for a brightening serum with minimal stickiness
- Those who want a natural, moisturized glow
- Those trying a glutathione serum for the first time

## Products

- HEEDA Glutathione Brightening Serum — HEEDA
- 2주, 겨울철 사용
- 쿠팡 — ‘희다 세럼’ 검색 후 구매

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Superchart · https://superchart.com/en/@out-and-back/heeda-glutathione-oily-skin-winter-serum/ · https://superchart.com/llms.txt