numbuzin No.5+ Glutathione Vitamin Mask Review | Texture, Ingredients & Honest Take
【Glutathione & Niacinamide, each at 50,000ppm】The eye-catching yellow film sheet mask everyone’s talking about
My honest take on the texture, ingredients, and experience
※This post contains affiliate links.
ℹ️ Note: in Korea, this product is registered under a dual “brightening / anti-wrinkle” functional cosmetic classification. This system is based on Korean regulations and doesn’t mean the same claims or classification are recognized elsewhere. This review isn’t asserting any specific medical effect — it’s simply sharing hands-on experience with a Korean product.
- What numbuzin’s Glutathione Vitamin Mask actually looks and feels like
- What the Korean functional labeling actually means
- How to use it correctly
- Real reviews — the good and the not-so-good
- Drawbacks and things to watch for
- Where to buy it
Purchased and used in Korea. I checked how well the sheet clung to my skin, whether the dye transferred, and how my skin looked afterward.
For anyone who wants an even, all-over brightening boost.
numbuzin’s (넘버즈인) “5번 비타민C 뿌려만든 글루타치온 필름팩” (No.5+ Glutathione Vitamin Concentrated Mask) is a sheet mask made with a yellow film sheet sprayed with vitamin C powder, packed with a concentrated glutathione and niacinamide ampoule. It’s positioned as a “brighten every corner” mask.
#넘버즈인
#GlutathioneMask
#KoreanSheetMask
✅ Worth trying if you…
- Want even, all-over skincare
- Are curious about vitamin C and glutathione sheet masks
- Deal with dullness after sun exposure
- Want to try a single-use mask
❌ Maybe skip if you…
- Are worried about dye transfer onto clothes or towels
- Expect immediate brightening results
- Have sensitive skin and are wary of new products (patch test first)
- Want the simplest possible ingredient list
※ Purchased and tested in Korea for this review.
- ① What Is numbuzin’s No.5+ Glutathione Vitamin Mask? First Look
- ② Features & Ingredients of the Glutathione Vitamin Mask
- ③ How to Use It Correctly
① What Is numbuzin’s No.5+ Glutathione Vitamin Mask? First Look
Sheet Mask
▲ The front: “Glutathione + Vitamin C,” “Brightening & Glowing,” 27ml, No.5 Mask
▲ The back: ingredients, directions, and full ingredient list (in Korean and English)
💬 My honest first impression
Opening the pack, a vivid orange-to-yellow film sheet was soaking in a generous amount of essence. The sheet felt sturdier and thicker than a lot of other masks I’ve tried, and it clung to my face with a cool, snug fit.
The color is quite intense, so I had to be careful that dripping essence didn’t get on my clothes or towel. After leaving it on for 10-20 minutes and removing it, my skin had a slight yellow tint for a moment, but it faded as I patted it in. Results vary from person to person, but it’s easy to treat this as a special-occasion mask 😊
| Brand | numbuzin (넘버즈인) |
|---|---|
| Product | 5번 비타민C 뿌려만든 글루타치온 필름팩 |
| Size | 27ml, single sheet (multi-packs also sold) |
| Certification | Dual functional cosmetic — brightening / anti-wrinkle (Korean standard) |
| Made in | South Korea |
Check the price on OLIVE YOUNG →
② Features & Ingredients of the Glutathione Vitamin Mask
Here’s a breakdown based on the packaging and official brand information.
Made with vitamin C powder
Not just dyed — the yellow film sheet is actually made by spraying vitamin C powder onto the material.
50,000ppm glutathione + 50,000ppm niacinamide
The sheet is soaked in a concentrated ampoule with glutathione and niacinamide, each at 50,000ppm.
Multiple test claims on the label
The packaging references tests related to trouble-prone skin, dullness from UV exposure, dark spots and pigmentation, skin tone brightening, and low irritation.
Dual functional cosmetic — brightening & anti-wrinkle
Registered under Korean standards for two functional claims: skin brightening and wrinkle improvement.
💊 Key Ingredients (per official packaging)
According to the brand’s official English ingredient list, the notable ingredients include:
- Niacinamide
- Glutathione
- Ascorbic Acid & Sodium Ascorbyl Phosphate (Vitamin C and its derivative)
- Arbutin
- Hyaluronic Acid
- Ceramide NP
- Centella Asiatica Extract
- Adenosine
The base also includes ingredients like Water and Methylpropanediol.
※ The above is a general introduction based on packaging claims, not an independent lab analysis by this blog. Results vary from person to person. Please check the full ingredient list on the packaging or the retailer’s product page for the most accurate details.
③ How to Use It Correctly
Cleanse and prep your skin
Cleanse your face and apply toner to prep your skin before use.
Unfold and apply starting at the eyes
Unfold the sheet, line up the eye area first, then press it onto the rest of your face.
Leave on for 10-20 minutes, then remove
After 10-20 minutes, remove the sheet and gently pat any remaining essence into your skin.
✅ Tips for best results
- Line up the eye area first when applying
- Leave on for 10-20 minutes
- Pat in any remaining essence
⚠️ Things to watch for
- Stop use if redness, swelling, or itching occurs with sun exposure
- Avoid areas with cuts or active inflammation
- Keep out of reach of children
- Avoid contact with eyes
④ numbuzin Glutathione Vitamin Mask Reviews — What People Are Saying
Here’s a category-by-category look at trends I’ve seen across Korean e-commerce sites and social media.
| Category | General trend |
|---|---|
| Adherence | Many say the sheet clings well to the face |
| Skin after use | Some say their skin looked brighter afterward |
| Dye transfer | Some mention the deep color needs careful handling |
| Value | Buying multi-packs is often mentioned as better value |
| Speed of results | Mixed opinions — some don’t notice a fast difference |
⑤ Drawbacks & Things to Watch For
❶ Watch out for dye transfer
Because of the vivid orange-to-yellow sheet, dripping essence can transfer color onto clothing, towels, or bedding. Laying down a towel around your neck or applying it over a sink can help.
❷ The “brightening / anti-wrinkle” claim is Korea-specific
The functional claims on the packaging follow Korean regulatory standards. They don’t guarantee equivalent effects under other countries’ cosmetic classifications, so treat this as reference information only.
❸ How it feels can vary sheet to sheet
Since it’s a single-use mask, it can take a few tries to know whether it agrees with your skin. Starting with just a couple of sheets is a good idea.
⑥ Where to Buy It
numbuzin’s No.5+ Glutathione Vitamin Mask is sold at OLIVE YOUNG in Korea, along with the brand’s official online store.
| Retailer | Notes | Details |
|---|---|---|
| 🌿 OLIVE YOUNG Global | Official・Direct ship | Ships genuine products directly from Korea. Confirmed carrying this line. |
Reference price (per sheet): around ₩3,500 (approx. $2.40 USD)
※ Prices fluctuate with exchange rates and promotions. Buying a multi-pack usually brings the per-sheet cost down. Please check the official retailer for the latest price.
🌿 OLIVE YOUNG Global
Ships genuine products directly from Korea. No worries about parallel imports or counterfeits.
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⑦ FAQ
Q. Is this okay for sensitive skin?
A. It’s not guaranteed to work for everyone. Do a small patch test first, and stop use if you notice any irritation.
Q. Does this really brighten skin?
A. The functional claims on the packaging are based on Korean standards and aren’t a guarantee of results for everyone. Some reviewers mention their skin looking brighter right after use, but results vary from person to person.
Q. Will the yellow color stay on my skin or clothes?
A. Right after removing it, you may notice a temporary yellow tint on your skin, but most reviewers say it fades once patted in. Watch out for dye transfer onto clothing and towels.
Q. How often can I use it?
A. The packaging doesn’t specify a frequency. It’s worth using it as an occasional special-treatment mask while watching how your skin responds.
Q. Can I use numbuzin’s No.5+ mask every day?
A. There’s no set frequency on the packaging. Some people do use it daily, but it’s worth watching how your skin responds and adjusting as needed.
⑧ Final Verdict — Who Should Try This
- Looking for even, all-over skincare
- Curious about vitamin C and glutathione sheet masks
- Dealing with dullness after sun exposure
- Wanting to try a special-treatment sheet mask
👍 Overall — the good
- The vitamin-C-powder yellow sheet is a unique touch
- Concentrated ampoule with 50,000ppm each of glutathione and niacinamide
- Adheres well to the face
- Multi-packs bring good value
👎 Overall — the not-so-good
- Watch out for dye transfer
- The “brightening / anti-wrinkle” claim is Korea-specific
- Being single-use, it takes a few tries to know if it agrees with your skin
With its distinctive vitamin-C-powder yellow sheet, numbuzin’s mask is worth a look if you’re after an even, all-over brightening boost.
🔗 Related Reviews & Korean Skincare
Anua PDRN Hyaluronic Acid Capsule 100 Serum Review
A popular Korean serum for water-glow skin. Honest review of the texture with PDRN and hyaluronic acid.
※ This post is for general informational purposes and doesn’t guarantee any specific effect. If you experience any skin irritation, please see a dermatologist rather than self-treating. Prices change over time — please confirm current pricing before purchasing.
