Beauty of Joseon Glow Serum vs Glow Deep Serum: which do you pick?

How the two serums differ

The split is in the actives. The Glow Serum is built around propolis and niacinamide. Propolis is the resin bees collect from tree buds; in a serum it behaves as a humectant, drawing water into the skin, with a little antioxidant activity on the side. It is also the source of the faint, slightly tacky finish. Niacinamide, a form of vitamin B3, is the better-studied of the pair: it helps calm redness, supports the skin’s barrier and reins in oil. A 2006 study of 2% niacinamide measured a drop in sebum over four weeks. That is the concentration and the timeline worth keeping in mind: it eases oil down gradually, without stripping the skin.

The Glow Deep Serum swaps that pairing for rice extract and alpha-arbutin. Rice bran, a long-standing Korean skincare staple, brings amino acids and vitamins for a soft radiance. Alpha-arbutin is the brightening half: a plant-derived compound built around hydroquinone, the ingredient long used for pigment, with a sugar attached to it. The proposed mechanism is that it slows tyrosinase, the enzyme skin uses to make melanin, which is what shows up as dark spots. A 2021 review in Antioxidants sets out that model and is careful about where it lands, putting arbutin “somewhere between the advantages of efficacy and the disadvantages of side effects”: it rarely causes dermatitis, but the same review flags that hydroquinone can be released from it during use. Worth knowing, and not a reason to avoid it.

So the two bottles aim at different problems. One works on hydration, oil and the overall look of tired skin. The other works on color, evening out the patches of extra pigment that sun and old blemishes leave behind. The shared word “Glow” hides that difference more than it should.

Who each one suits

If your skin reads oily, congested or just dull and dehydrated, the Glow Serum is the better fit. Propolis handles the hydration, niacinamide works on the oil and the look of your pores, and the whole thing sits light enough to wear morning and night without adding grease. It’s also the cheaper way to get both of those actives in one step.

If your main issue is tone, whether that is old acne marks, sun-driven patches or a complexion that just looks blotchy in color, the Glow Deep Serum is the one to reach for. Alpha-arbutin is one of the gentler routes to fading that kind of dark spot, and the rice extract adds a soft glow while it works. Give it a clear few weeks before you judge it. Gentle brightening is slow brightening, and the trial evidence for this family of ingredients runs in months rather than days.

Can you use both?

Yes, and plenty of people do. The two serums don’t clash. One works on water and oil, the other on pigment, and neither active is harsh enough to cause a problem layered with the other. The simplest way to run both is one in the morning and one at night, or the Glow Serum first as the lighter layer, then the Glow Deep over the top. If you go that route, keep each layer thin so they sink in and don’t pill, or roll into little flecks, under sunscreen.

Sunscreen matters here, and doubly so with the Glow Deep. Alpha-arbutin fades the pigment you already have, but sunlight keeps making more of it, and no serum can fade a spot faster than the sun re-darkens it. So a brightening step does very little without daily sun protection over it. Daily sunscreen is the whole reason a brightening routine gets anywhere; the AAD puts the floor at broad-spectrum SPF 30, worn whether or not the sky looks threatening.

The answer

The Glow Serum, with its propolis and niacinamide, is the one for skin that’s dull, dehydrated or prone to oil and congestion — it hydrates, calms redness and keeps shine in check. The Glow Deep Serum, with its rice and alpha-arbutin, is the one for evening out tone and softening old dark spots, as long as you give it the few weeks it needs and keep your sunscreen up. If you can’t decide, start with whatever bothers you most when you look in the mirror. That’s the bottle to buy first.