I’m very careful with strong skincare actives because using too many at once can quickly turn a good routine into an irritated one.

Instead, I rotate different formulas depending on what my skin needs that evening and always keep the rest of my routine simple.

Haruharu Wonder Black Rice Night Knight Retinol Serum

When I want to introduce retinol without making my nighttime routine feel too aggressive, I reach for Haruharu Wonder Black Rice Night Knight Retinol Serum. The packaging actually says “for beginners,” which perfectly describes how I like to use it: slowly and consistently rather than every single night.

I apply a small amount after cleansing and let it absorb before following with moisturizer. Retinol is the active I choose when my main goal is smoother-looking texture, a more refined appearance and gradual support for firmer-looking skin. I prefer starting with just a few evenings per week and increasing frequency only if my skin feels comfortable.

Purito Seoul Azelaic Acid Kojic Tea Tree Serum

This is the serum I gravitate toward when my skin looks uneven or I’m dealing with post-breakout marks. Purito Seoul Azelaic Acid 10 Kojic Tea Tree Serum combines azelaic acid with kojic acid and tea tree, so I see it as my more clarifying option.

The texture feels easy to layer, and I usually apply it before moisturizer. I especially like azelaic acid in routines focused on redness, blemish-prone areas and uneven tone.

I personally wouldn’t layer this with every strong active in my collection on the same evening. Alternating products keeps my routine much easier to control.

Arencia Retinal Booster Shot

Arencia Face & Eye Moisturizer Retinal Booster Shot is the option I use when I want my routine to focus more on firmness and the eye area. The formula is labelled with a Retin-A complex and caffeine, which immediately makes it feel like a targeted nighttime treatment rather than a basic moisturizer.

I use only a small amount, especially around the eyes, and avoid applying it too close to the lash line. Because retinal belongs to the vitamin A family, I treat this as another active night and keep the rest of my skincare calm and uncomplicated.

How I Rotate Them

The biggest lesson I’ve learned with active skincare is that more isn’t always better. I don’t use all three products together. Instead, I choose one main active depending on whether I’m focusing on texture, uneven tone or firmness.

That approach keeps my routine much more comfortable and also makes it easier for me to understand which product is actually making a difference. And whenever retinoids are part of my evening routine, sunscreen the next morning is non-negotiable for me.