Recently, retinol ingredients have become trendy, so I tried using various products as well.

I have tried using a wide range from low to high concentrations.

But I think sensitive people should be careful when using it.

I find it a bit burdensome to apply even the very low concentration every day, so I use it every other day.

For localized areas, products like Iope 0.3 or even 1% products like Stiva are also okay.

It seems similar, but when using the entire face for definitive purposes, I think it's better to always choose the one with a lower concentration.