# Brightening serum for dull skin: HEEDA Glutathione Serum - By Yerin (https://superchart.com/en/@trial-basket-beauty/) - Written Aug 31, 2026 - Updated Sep 11, 2026 - Products › Beauty products - Product provided: I received this product and used it. [type=provided] - English edition: https://superchart.com/en/@trial-basket-beauty/heeda-glutathione-serum-daily-lightweight/ - Also in: [한국어](https://superchart.com/ko/@trial-basket-beauty/heeda-glutathione-serum-daily-lightweight/index.md) ## In short HEEDA Glutathione Serum is a 30 ml brightening serum I used for visible dark spots and a dull-looking skin tone in Korea. It felt smooth, light, and quick-absorbing with little stickiness, though I plan to watch for skin-tone changes after finishing the bottle. ## Good to know - **Product**: HEEDA Glutathione Serum - **Volume**: 30 ml - **When I used it**: During my morning skincare routine and as the final step of my evening routine - **Skin concerns**: Visible dark spots and a dull-looking skin tone - **Where to buy**: Search “HEEDA serum” on Coupang *Prices as written by the tester on Aug 31, 2026 · not updated automatically* ## Was it comfortable to use without stickiness? ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-01-1f4c6-900.webp) I do not like sticky formulas that feel as though they leave a film on my skin, but this serum spread smoothly when I dispensed it onto my hand and applied it. It felt like it absorbed faster than I expected, and it did not leave a heavy, cream-like finish, so I have been happy with how it feels so far. ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-02-av0j7-1200.webp) ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-03-1v5ci-900.webp) ## What skin concerns did I use it for? ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-04-1u6h6-900.webp) On days when my dark spots were noticeable and my skin tone looked dull, I used it because I wanted to keep up brightening care as well as hydration. I had previously tried a cream from the same functional line, but the serum felt lighter in both texture and use. ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-05-1pu8q-900.webp) ## How did I apply it morning and night? ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-06-1w3h0-900.webp) ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-07-1qmlg-900.webp) It did not feel burdensome to apply during my morning skincare routine, and at night I used it as the final step of my basic skincare routine. Even on days when applying skincare felt like a chore, I reached for it because it felt light. ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-08-24a3r-900.webp) ## What did I expect from brightening care? ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-09-1peho-900.webp) Rather than expecting dark spots or my skin tone to change dramatically in a short time from one cosmetic product alone, I see value in caring for my skin consistently alongside sun protection. According to the original post, this product was reported to the Ministry of Food and Drug Safety as a functional whitening cosmetic, and results from a low-irritation test and a sensitive-skin use test are available. I plan to keep using one bottle and observe any changes in my skin tone myself. ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-10-8n5ds-900.webp) ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-11-2o18a-900.webp) ## What have I liked most so far? ![Brightening serum for dull skin: HEEDA Glutathione Serum](https://img.superchart.com/images/heeda-glutathione-serum-daily-lightweight/heeda-glutathione-serum-daily-lightweight-12-z5qp5-900.webp) So far, I have liked its fresh application, non-sticky finish, and texture that is easy to use every day. This is a personal use record that may be useful if you prefer a lighter, absorbent feel over a heavy, sticky serum. ## Products - HEEDA Glutathione Whitening Tone Care Glow Serum, 1 x 30 ml — HEEDA - 쿠팡 — '희다 세럼' 검색 후 구매 --- Superchart · https://superchart.com/en/@trial-basket-beauty/heeda-glutathione-serum-daily-lightweight/ · https://superchart.com/llms.txt