If you've wondered why some anti-aging serums use "retinal" instead of the more familiar "retinol," the answer comes down to speed and science. Both are forms of vitamin A that target wrinkles, fine lines, and uneven skin tone, but retinol needs two conversion steps inside the skin before it becomes active—while retinal needs only one. That single step makes a bigger difference than it sounds: studies show retinal converts to its active form roughly 11 times faster than retinol, meaning it starts working on aging skin and hyperpigmentation sooner, often with less irritation along the way.
That efficiency is exactly why KSECRET built its SEOUL 1988 line around retinal rather than standard retinol. True to the principles of Korean skincare, the formulas are designed to deliver potent results without compromising the skin barrier—so your skin looks visibly smoother and brighter, without the redness and flaking that often comes with harsher actives.
Like all retinoids, retinal belongs in your night time skincare routine: apply after cleansing and before moisturizer, since sunlight breaks it down and can increase sun sensitivity. Stay consistent at least for 2 weeks, and don't be surprised if "what's your secret?" becomes a question you hear often.
Ready to see the difference for yourself? Try SEOUL 1988's Retinal Liposome 2% Serum for your everyday routine, or reach for the Retinal Liposome 4% Eye Cream to target the delicate eye area.