Cos De BAHA Arbutin 5%+Niacinamide Serum — arbutin interrupts pigment production; niacinamide slows pigment transfer to the surface. Running both at 5% means this serum works on two points in the same process, and it does so without the sting that acids bring.
That makes it a sensible pigmentation option for skin that cannot tolerate a strong vitamin C or an aggressive acid routine.
Best for
Freckling, sun spots, post-blemish marks, and generally uneven tone.
How to use Cos De BAHA Arbutin 5%+Niacinamide Serum
Apply to clean skin morning and night before moisturiser. Consistent daily sunscreen is what makes the difference between visible results and none at all.
What is in it
Niacinamide
The appeal of niacinamide is how little it asks of your skin. It is stable, it does not need a low pH to work, and it does not make skin sun-sensitive. What it does is steady: firmer barrier function, less visible oil through the day, and a slow fade on post-blemish marks. Very high concentrations can feel warm on reactive skin, which is why most well-judged formulas sit between two and ten percent rather than chasing a bigger number. Background reading on niacinamide if you want the chemistry behind it.
Arbutin
Arbutin is a naturally occurring compound that releases hydroquinone very slowly in skin, which gives a meaningful part of hydroquinone’s effect on dark marks without the irritation or the rebound risk that comes with using the pure form unsupervised. It is gentle enough for long-term daily use and shows up constantly in Korean brightening formulas for that reason. Like every pigment ingredient, it is wasted without daily sunscreen.
Vitamin C
The trade-off with vitamin C is potency against stability. L-ascorbic acid has the strongest evidence behind it but degrades quickly and needs a low pH that some skin finds uncomfortable. Derivatives are gentler and last longer in the bottle, at the cost of converting less efficiently once applied. Either way, store it away from light, close it properly, and use it in the morning where its antioxidant effect earns its keep.
What to use it with
Seal this in with a moisturiser and apply it to skin that is still damp from a toner — both steps make a measurable difference to how much of the serum stays where you put it. From the rest of our range, Medicube AGE-R Glutathione Glow Capsule Cream and SKIN1004 Madagascar Centella Toning Toner are sensible companions, and both are stocked with the same cash-on-delivery terms.
Where it fits in your routine
A serum goes on after cleansing and toning, while skin is still slightly damp, and before anything heavier. That order matters more than people expect — the thinnest, most concentrated layer needs direct contact with skin, not a film of moisturiser in the way. Give it thirty seconds to absorb, then seal it in with a cream. If you are using more than one serum, the lighter one goes first.
Before you start
Keep this away from light and heat, and close it properly. Vitamin C oxidises with exposure — if the liquid turns deep yellow or brown, it has lost most of its potency and is worth replacing.
Common questions
Is Cos De BAHA Arbutin 5%+Niacinamide Serum authentic?
Yes. Euros Belle stocks sealed, unopened units sourced through the brand’s own distribution, and we do not sell testers, decants or refilled packaging. Every order is checked before it leaves us, and you are welcome to inspect the seal at the door before paying.
Can I pay cash on delivery?
Cash on delivery is the only payment method we offer — there is nothing to pay in advance and no card details to enter anywhere. You pay the delivery agent when the parcel reaches you. Inside Dhaka delivery is ৳70 and takes one to two days; outside Dhaka it is ৳130 and takes three to four.
Does the Dhaka climate affect it?
Heat and humidity shorten the working life of most cosmetic formulas, and actives like vitamin C and retinoids are the first to suffer. Keep the product capped, out of direct sun, and away from the hottest corner of a bathroom. A cool cupboard is better than a windowsill, and better than a fridge for most textures.
How should I store it?
Somewhere cool and out of direct sunlight, with the cap closed properly. Bangladesh’s heat and humidity shorten the life of most formulas, and a bathroom shelf directly above a hot shower is the worst place in the house for anything active.
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