K-beauty, read closely — ingredients, textures, and the choices between them.
numbuzin
A 30mL tone-focused serum with niacinamide, tranexamic acid, glutathione and several vitamin C ingredients. This is No.5+ Glutathione Vitamin Concentrated Serum, not the separate 10g TXA Advanced Ampoule Concentrate.
| Exact product | No.5+ Glutathione Vitamin Concentrated Serum |
|---|---|
| Pack | 30mL dropper bottle |
| Distinct product | TXA Advanced Ampoule Concentrate · 10g |
| Use timing | Morning / evening in brand graphic |
Consider it for: You want a tone-focused serum and are comparing its disclosed ingredients and four-week results with the elasticity-focused No.9 essence.
Based on brand information and published sources, not a hands-on review.
01 / TEXTURE
A dropper serum. The current packshot identifies Glutathione Vitamin Concentrated Serum; the brand also shows a packaging-change graphic stating that the formula is unchanged. That packaging statement does not make the separate TXA Advanced Ampoule the same product.
03 / YOUR ROUTINE
Apply an appropriate amount, spread gently along the skin and pat lightly until absorbed, following the matching Olive Young U.S. 30mL listing. A brand gallery graphic allows morning and evening use; use the current bottle for any additional directions.
Do not borrow concentrations, directions or images from the separate TXA Advanced Ampoule. The brand’s irritation-test statement does not establish that every sensitive-skin user will tolerate this serum.
CHOOSING THIS FORMULA
The 30mL serum and 10g ampoule concentrate have separate product pages and ingredient lists. Similar numbers and dark-spot positioning do not establish that they are interchangeable. Check the complete product name and pack size before comparing concentrations or following directions.
The brand reports skin-tone evenness and dark-spot change as separate four-week endpoints. A change in evenness does not mean that percentage of dark spots disappeared. The published text does not provide enough measurement detail to compare those figures directly with results from another brand’s study.
FORMULA NOTES
| Ingredient | Role or purpose | Formula detail |
|---|---|---|
| Niacinamide · tranexamic acid | Tone-focused ingredients | Presence confirmed in the serum list |
| Glutathione · vitamin C ingredients | Antioxidant / tone positioning | Individual concentrations not adopted from other SKUs |
| Panthenol · ceramide NP · sodium hyaluronate | Conditioning and hydration ingredients | Part of the combined serum formula |
Official ingredient list ↗. Ingredient roles explain the formula. Product-specific measurements appear below.
BRAND-REPORTED EVIDENCE
| Outcome | Reported result | Timing / context |
|---|---|---|
| Skin-tone evenness | +18.90% | 4 weeks |
| Dark-spot measure | −9.65% | 4 weeks |
Current U.S. brand-page results. Sample size, population, testing institution, comparator and measurement methods are not disclosed. Promotional before-and-after images are not treated as independent confirmation of these numbers.
Brand results and available test conditions ↗ON THE LABEL
Water, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Vaccinium Vitis-Idaea Fruit Extract, Behenyl Alcohol, Pentylene Glycol, Glycerin, Chondrus Crispus Extract, Butyrospermum Parkii (Shea) Butter, 3-O-Ethyl Ascorbic Acid, Saccharum Officinarum (Sugarcane) Extract, Carbomer, Alpha-Arbutin, Bisabolol, Tromethamine, Ethylhexylglycerin, Bifida Ferment Lysate, Adenosine, Hydrogenated Lecithin, Allantoin, Sodium Hyaluronate, Xanthan Gum, Glutathione, Disodium EDTA, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Ceramide NP, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Beta-Glucan, Dipotassium Glycyrrhizate, Tocopherol, Ascorbic Acid, Ascorbyl Glucoside, Tocopheryl Acetate, Hydroxypropyl Cyclodextrin, Ubiquinone, Thioctic Acid, Tremella Fuciformis (Mushroom) Extract, Potassium Hydroxide
Original ingredient list ↗COMMON QUESTIONS
No. No.9 NAD+ BIO Lifting-sil Essence is a separate elasticity-focused essence with a different ingredient list.
Official product reference ↗No. TXA Advanced Ampoule Concentrate is a separately named product with a separate formula.
Official product reference ↗The gallery includes a Dark Spot Serum concentration graphic whose version relationship is not explained in the page text. This guide does not transfer those numbers to the separate ampoule.
Official product reference ↗RELATED PRODUCT OPTIONS
04 / THE NEXT STEP
Check the size, full ingredient list, price, stock and delivery to your address on the seller’s page.
SIDE BY SIDE
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Explore the productSources checked: 2026-10-23
Product details follow the linked global / US sources. Check the label sold in your country for ingredients and directions.
YOUR NEXT STEP
numbuzin · No.5+ Glutathione Vitamin Concentrated Serum · 30mL
US / global product information
Keep this product selected while you compare another option. Read the listed differences before checking the seller’s current terms.
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Your notes and saved routine stay in this browser. They are private records, not public reviews or a test of a product’s effects.
Calculations use complete ingredient lists for the stated market and product version. Listed names do not establish concentrations, equivalent effects or allergy suitability.
Explore products in the same use group with overlapping ingredient lists, then compare their texture, directions and ingredient differences.
Candidates share the page’s language, market context and use group and have a complete ingredient list available. Names are normalized for spacing and reviewed synonyms; duplicate names count once.
The default order divides shared names by all distinct names across both lists: 10 shared names out of 20 distinct names gives 10 ÷ 20. You can instead order by the number of shared names. Up to five candidates are shown.
Ingredient overlap does not establish equivalent effects or a cheaper substitute. Concentrations, ingredient order, finished-product tests and feel are not part of this calculation. Missing lists are not treated as missing ingredients.
EQQUALBERRY
27 shared · 20 only in this product · 32 only in candidate
79 distinct names across both lists
Candidate ingredient source ↗ · 2026-10-22
Beauty of Joseon
17 shared · 30 only in this product · 13 only in candidate
60 distinct names across both lists
Candidate ingredient source ↗ · 2026-10-23
Anua
19 shared · 28 only in this product · 26 only in candidate
73 distinct names across both lists
Candidate ingredient source ↗ · 2026-10-23
medicube
16 shared · 31 only in this product · 16 only in candidate
63 distinct names across both lists
Candidate ingredient source ↗ · 2026-10-31
PURITO SEOUL
17 shared · 30 only in this product · 20 only in candidate
67 distinct names across both lists
Candidate ingredient source ↗ · 2026-10-23
The products below share listed ingredient names. This does not establish equal concentrations or effects.
Water, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Vaccinium Vitis-Idaea Fruit Extract, Behenyl Alcohol, Pentylene Glycol, Glycerin, Chondrus Crispus Extract, Butyrospermum Parkii (Shea) Butter, 3-O-Ethyl Ascorbic Acid, Saccharum Officinarum (Sugarcane) Extract, Carbomer, Alpha-Arbutin, Bisabolol, Tromethamine, Ethylhexylglycerin, Bifida Ferment Lysate, Adenosine, Hydrogenated Lecithin, Allantoin, Sodium Hyaluronate, Xanthan Gum, Glutathione, Disodium EDTA, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Ceramide NP, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Beta-Glucan, Dipotassium Glycyrrhizate, Tocopherol, Ascorbic Acid, Ascorbyl Glucoside, Tocopheryl Acetate, Hydroxypropyl Cyclodextrin, Ubiquinone, Thioctic Acid, Tremella Fuciformis (Mushroom) Extract, Potassium Hydroxide
Ingredient source ↗ · 2026-10-23 · US product listing
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