
Published: 2026.06.19
Last updated: 2026.06.19
Most sellers shelve their retinal SKUs in summer. The logic is sun sensitivity. But that logic assumes the customer skips sunscreen, and in summer they don't. Our June order data shows the gap. Celimax's Vita-A Retinal Shot moved more volume than any sunscreen in our top five this week, and it grew 10% versus May.
Retinal is the faster, gentler relative of retinol. Its one real drawback in summer is photosensitivity. It can leave skin more reactive to UV. Daily sunscreen cancels that drawback. So the moment a customer commits to summer SPF, a nighttime retinal stops being risky and becomes logical. Protection by day, treatment by night.
That is the summer skincare trend hiding under the obvious one. The sunscreen is not only the product. It is the thing that unlocks the next product. When you sell the SPF, you have already qualified that buyer for an active they can now use safely.
Build depth on SPF first, because it carries the routine and sells on its own. Beauty of Joseon's Relief Sun Aqua-fresh holds a 39% reorder rate and grew 25% over May. Reorder rate is the share of a product's buyers who order it again, so a high one is demand you can plan around. Round Lab's birch juice sunscreen ran even harder on momentum, up 12x versus May.
Then add the active on top. The retinol category is growing toward US$1.2 billion by 2030, and a gentle Korean retinal is the easiest entry point for shoppers new to actives. For a korean skincare wholesale buyer, that pairing turns one sunscreen sale into a two-product basket.
Here is how we'd weight your order this week:
Sell the pairing, not the SKU. Position retinal as the nighttime half of a daytime SPF routine.
Stock SPF deep first. It makes the active safe and moves on its own.
Choose gentle retinal over retinol for first-time users. Lower irritation means a cleaner second order.
These are the products buyers are pairing across SEOUL4PM right now:
Beauty of Joseon Relief Sun Aqua-fresh — 39% reorder rate, up 25% vs May. View product →
Round Lab Birch Juice Moisturizing Sunscreen — up 12x vs May. View product →
Celimax Vita-A Retinal Shot Booster — this week's top order volume, the nighttime active to pair on top. View product →
Stock the day-and-night set together: SPF to protect, retinal to treat.
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