Niacinamide 20,000 ppm
Two percent, and the functional active named on the Korean registration. Everything else on this list is supporting it.

GENOSYS
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Serum · Dull and uneven skin tone
Twelve vitamins. Four of them at a dose.
The carton prints the number beside every one, and the ladder is worth reading: niacinamide at 20,000 ppm, panthenol at 10,000, stable vitamin C at 1,000, vitamin E at 300, and then eleven more measured in parts per billion. Korea registers this as a whitening functional cosmetic and names niacinamide as the active. Pat it in, morning and night.
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20,000
ppm niacinamide, the registered active
−28.0%
Surface melanin at two weeks, in the maker's trial
1,000
ppm stable vitamin C, printed on the carton
30ml
Dropper bottle, morning and night

What it does
Melanin is made, then handed to the cells above, then shows up as tone. The serum works at more than one point on that chain, which is why the ingredient list looks the way it does.
MELAZERO® and stable vitamin C at 1,000 ppm work on the synthesis end. Licorice root sits alongside them.
Niacinamide at 20,000 ppm. This is the largest active in the bottle and the one Korea registers the whitening claim on.
Panthenol at 10,000 ppm, which is the reason a vitamin serum this loaded does not have to leave the face tight.

The ladder
Very few brands print how much of each vitamin they used, and there is a reason for that. This carton prints all fifteen. Four are in parts per million and eleven are in parts per billion, and once you can see that laid out, the phrase twelve vitamin complex means something honest rather than something vague.
Two percent, and the functional active named on the Korean registration. Everything else on this list is supporting it.
One percent of provitamin B5. It is the comfort half and the reason the texture reads as a glow rather than a sting.
A tenth of a percent of one of the more stable vitamin C derivatives. A real but modest dose, and the page will not pretend otherwise.
The patented complex, and unusually for a branded name it is not a trace: the two botanicals are at four hundred and one hundred parts per million.
Glutathione, biotin, folic acid, B6, B12, B1, B2, beta-carotene, inositol, linoleic acid. Real, listed, printed with their doses, and not doing the work. The carton says so before we do.

How to use
Morning and night
Start on clean skin with a toner down first.
On the face, avoiding the eye area. The carton asks for patting rather than rubbing.
The manufacturer is direct about this: it contains active vitamins and you may feel a sting. Use a small amount to begin with and give your skin time to adjust. If the irritation carries on, stop.
Non-negotiable with a brightening serum. Working on tone without protecting from UV is working against yourself.
The carton warns the colour can darken with air exposure without the product changing how it works. The manufacturer suggests the fridge.
Not for use during pregnancy. That warning is on the carton, on the Turkish panel rather than the English one, and it belongs where you can actually see it.
See it in the bottle

The proof
One clinical and one panel, both run by the manufacturer, and both about tone.
Two weeks is what was measured, so two weeks is what the page claims. There is no four-week or six-week figure and no wrinkle, pore or firmness study behind this bottle.
What is in it
Fifty-five entries, and the useful thing about this one is that fifteen of them arrive with their dose attached.
Two percent, and the largest active in the bottle. Korea registers this serum as a whitening functional cosmetic and names niacinamide as the functional ingredient, so this is not a supporting act.
The patented melanin complex. Unusually for a branded name it is not a trace: the two botanicals sit at four hundred and one hundred parts per million respectively, in a glycol carrier.
One percent of provitamin B5, printed on the carton. It is the comfort half, and the reason a serum this loaded with actives can still read as a glow.
A tenth of a percent of one of the more stable vitamin C derivatives. A real but modest dose, working at the synthesis end alongside MELAZERO.
Glutathione, biotin, folic acid, B6, B12, B1, B2, beta-carotene, inositol and linoleic acid, each printed on the carton with its dose. They complete the count of twelve. They are not doing the work.
Four botanicals at 0.01% each, with six more at 0.0015%. Present and listed, and named here rather than credited with an effect.
Aqua (Water), Butylene Glycol, Glycerin, 1,2-Hexanediol, Niacinamide (20,000 ppm), Dipropylene Glycol, Sorbitol, Methyl Gluceth-10, Panthenol (10,000 ppm), Eriobotrya Japonica Leaf Extract, Mentha Viridis (Spearmint) Extract, 3-O-Ethyl Ascorbic Acid (1,000 ppm), Tocopherol (300 ppm), Sodium Ascorbyl Phosphate (50 ppb), Glutathione (1 ppb), Biotin (1 ppb), Folic Acid (1 ppb), Pyridoxine (1 ppb), Cyanocobalamin (0.1 ppb), Linoleic Acid (0.01 ppb), Riboflavin (0.01 ppb), Beta-Carotene (0.01 ppb), Inositol (0.01 ppb), Thiamine HCl (0.01 ppb), Glycyrrhiza Uralensis (Licorice) Root Extract, Centella Asiatica Extract, Andrographis Paniculata Extract, Propolis Extract, Forsythia Suspensa Fruit Extract, Aloe Barbadensis Leaf Extract, Nelumbo Nucifera Seed Extract, Arctium Lappa Seed Extract, Lonicera Japonica (Honeysuckle) Flower Extract, Anemarrhena Asphodeloides Root Extract, Coptis Chinensis Root Extract, Psidium Guajava Leaf Extract, Sasa Quelpaertensis Extract, Opuntia Ficus-Indica Stem Extract, Gluconolactone, Brassica Campestris (Rapeseed) Sterols, Cholesterol, Ethylhexylglycerin, Macadamia Ternifolia Seed Oil, Citrus Aurantium Bergamia (Bergamot) Fruit Oil, Hydrogenated Lecithin, Carbomer, Xanthan Gum, Propanediol, Disodium EDTA, Tromethamine, Potassium Cetyl Phosphate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate, Polyglyceryl-10 Oleate, Polyglyceryl-10 Stearate, Polyglyceryl-10 Laurate, C12-14 Pareth-7, Limonene, Linalool.
Every ingredient, in the same order as the box in your hand, ppm and ppb figures included.
Is it for you
For external use only, and keep it clear of the eye area. Stop and speak to a doctor if redness, swelling or irritation appears.
Complete the routine
A serum is a step. These are the products it sits between, and you can add any of them here.
3This productLog in to shop
Specification
Questions
It is twelve vitamins, and the carton prints how much of each. Four of them are in parts per million: niacinamide at 20,000, panthenol at 10,000, stable vitamin C at 1,000 and vitamin E at 300. The other eleven are in parts per billion, some as low as a hundredth of one. The count is honest, the hierarchy matters more, and we would rather you saw the ladder than the number twelve.
Both, in the useful sense. It is a patented complex and its composition is on record: loquat leaf extract and spearmint extract in a glycol carrier. Unlike most branded complexes, it is not a trace here. The loquat is at 0.04% and the spearmint at 0.01%, so four hundred and one hundred parts per million respectively.
It might, and the manufacturer says so rather than hiding it. Use a small amount to start and let your skin get used to it. If the stinging carries on rather than settling, stop using it. That is their instruction and it is a sensible one.
The serum is the treatment step and the cream is the finish. This is where the niacinamide dose and the MELAZERO sit, so if you are buying one for tone, buy this one.
Yes, and it is the single most important thing on this page. A brightening routine without daily SPF is a tap running into a bath with the plug out.
Probably not. The carton says the colour can change on exposure to air while the effect stays the same, which is normal for vitamin formulas. Close the cap properly and keep it somewhere cool. If the smell or texture changes, that is different, so stop.
The batch on file came back at 5.94, inside a 6.1 plus or minus 0.5 specification.

The number that matters is on the box.
MULTI VITA RADIANCE SERUM
Niacinamide at 20,000 ppm, a patented melanin complex that is not a trace, and a two-week measurement to show for it.