Numbuzin No.5+ Glutathione Vitamin Concentrated Serum
Glutathione rather than vitamin C, so it works on overall sallowness without the sting that makes people abandon brightening in a fortnight.
Choose an option
- Glutathione
- No Sting
- Overall Dullness
- Daily Use
Only 5 left in stock
Dullness is not the same as dark spots.
Targeted actives chase specific marks. Sallowness - the grey, tired cast that has no single location - is a different problem and needs a different ingredient. Glutathione works on overall tone, and it does it without the sting that makes people abandon vitamin C in a fortnight.
- No sting
- Daily tolerable
- Fragrance-free
How it feels
A light serum that absorbs without residue. No warmth or tingle on application, which is the practical difference from a vitamin C serum.
Key ingredients
Glutathione
An antioxidant that works on overall tone rather than individual marks - the reason it suits sallowness where a spot corrector does nothing.
Niacinamide
A second route to tone, working alongside the glutathione while supporting the barrier.
Vitamin Derivatives
Stable forms rather than L-ascorbic acid, which is why the formula does not sting or oxidise the way a traditional vitamin C serum does.
About the product
Numbuzin's No.5 Glutathione Vitamin Serum treats a problem most brightening products ignore.
Dark spots and sallowness are different concerns. A spot corrector goes after pigment in a specific place; sallowness is the overall grey, tired cast that has no single location and does not respond to targeted treatment. Glutathione is an antioxidant that works on overall tone, which is why it suits this problem where a stronger, more targeted active would not.
The practical advantage is tolerance. High-strength vitamin C is potent and stings, and a great many people abandon it within a fortnight. This formula uses stable vitamin derivatives alongside niacinamide rather than L-ascorbic acid, so there is no warmth, no tingle and no oxidising in the bottle.
One thing worth being clear about: topical glutathione is a different proposition from the injectable form people often ask about, and works gradually on the skin's surface rather than systemically.
Use once or twice daily after cleansing, before moisturiser. Daily sunscreen matters more to the outcome than the serum itself.
Why we stock it
Glutathione is the ingredient people here ask for by name, usually after seeing it as an injectable. A topical serum is a different proposition and we are careful to say so - but for overall sallowness rather than specific marks, it is the gentler route that people actually stay on.
Product information
- Brand
- Numbuzin
- Skin concerns
- dullness, dark-spots
Ingredients
Glutathione, Vitamin C Derivative, Niacinamide, Tranexamic Acid
Care & Use
How to Use
Apply 2-3 drops to clean skin morning and night, then moisturiser. Sunscreen daily.
- 1.
Apply 2-3 drops to
Apply 2-3 drops to clean skin morning and night, then moisturiser.
- 2.
Sunscreen daily
Sunscreen daily.
Product details
Product details
- Brand
- Numbuzin
- SKU
- numbuzin-no-5-glutathione-vitamin-serum-30ml-30-ml
- Barcode
- 8809652581774
- Volume
- 30 ml
Frequently asked questions
Is this the same as glutathione injections?
No. Topical glutathione works gradually on the skin's surface; injectable glutathione is a systemic treatment and a different category entirely. Expect surface tone change over months, not a whole-body effect.
How is it different from a vitamin C serum?
Vitamin C is more potent on specific marks but stings and oxidises. This works on overall dullness with no sting, which means most people actually keep using it.
How long until I see a difference?
Eight to twelve weeks of daily use for overall tone. Daily sunscreen through that period does more for the result than the serum.
Can I use it with other actives?
Yes - it pairs comfortably with niacinamide, peptides and hydrating products. If you use a retinoid, apply this in the morning and the retinoid at night.
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