# Brightening serum for uneven tone, 2-week test: HEEDA Serum

- By Naeum (https://superchart.com/en/@after-the-order/)
- Written Dec 13, 2025
- Updated Sep 11, 2026
- Products › Beauty products
- Product provided: I received this product to try. [type=provided]
- English edition: https://superchart.com/en/@after-the-order/heeda-glutathione-daily-glow-serum-9c59/
- Also in: [한국어](https://superchart.com/ko/@after-the-order/heeda-glutathione-daily-glow-serum-9c59/index.md)

## In short

HEEDA Glutathione Even & Glow Serum is a 30ml Korean brightening serum I used morning and night for over two weeks. Its watery texture absorbed without stickiness and sat well under makeup; on my skin, my tone and redness marks looked more even, though the result was subtle.

## Good to know

- **Product**: HEEDA Glutathione Even & Glow Serum
- **Volume**: 30ml
- **Testing period**: More than 2 weeks
- **Skin type**: Suitable for all skin types
- **Function**: Functional brightening cosmetic
- **Shelf life after opening**: Recommended for use within 12 months
- **Where to buy**: Search “HEEDA Serum” on Coupang

*Prices as written by the tester on Dec 13, 2025 · not updated automatically*

## What are the texture and morning application like?

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum-9c59/heeda-glutathione-daily-glow-serum-01-7e5lu-1200.webp)

It was a clear, transparent, watery serum. It flowed lightly when dispensed onto my hand, but once applied, it absorbed quickly without stickiness. My skin felt fresh on the surface and hydrated underneath, without an oily film left behind.

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-02-1thk2-966.webp)

I used it before makeup in the morning and did not experience pilling. In the evening, it absorbed comfortably even when I layered it twice, which made it easy to use as a daily serum.

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-03-1u4mc-575.webp)

## How did my skin tone feel after more than two weeks?

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-04-ejux3-563.webp)

On my skin, I noticed an overall more even-looking tone before any sense that only certain areas had brightened. As redness and dark-spot marks looked more refined, my skin gave a slightly cleaner-looking impression.

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-05-h581n-966.webp)

Rather than an overly brightening effect, it was closer to making my skin look naturally clearer. I also liked that I could use it every day without irritation even when my skin condition was inconsistent.

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-06-1rk13-966.webp)

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-07-1ss7h-966.webp)

## What ingredients and product details are provided?

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-08-17crg-966.webp)

According to the original post, glutathione and niacinamide are presented as the key ingredient combination. It comes in a 30ml size and was labeled as suitable for all skin types and as a functional brightening cosmetic. It is recommended for use within 12 months of opening.

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-09-1uwfv-541.webp)

## Who might this suit?

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-10-z91ce-561.webp)

- Those concerned that their skin tone looks uneven
- Those whose makeup seems to catch on dark-spot marks and redness
- Those looking for a brightening serum with less stickiness
- Those who want daily inner-glow care rather than dramatic tone-up effects

![Brightening serum for uneven tone, 2-week test: HEEDA Serum](https://img.superchart.com/images/heeda-glutathione-daily-glow-serum/heeda-glutathione-daily-glow-serum-11-1cila-966.webp)

I was satisfied with it as a serum I could add to my daily skincare routine comfortably, rather than expecting a dramatic short-term change. Skin reactions and perceived results vary from person to person, so it is best used according to your own skin condition.

## Products

- HEEDA Glutathione Even & Glow Serum 30ml — HEEDA
- 2주 이상, 아침·저녁 사용
- 쿠팡 — '희다 세럼' 검색 후 구매 안내

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Superchart · https://superchart.com/en/@after-the-order/heeda-glutathione-daily-glow-serum-9c59/ · https://superchart.com/llms.txt