High-concentration niacinamide products are really effective for oil control.

I've tried Dior, Polar's Choice, Isol, and One Thing at least once, but even if it's just over 10%,

I can confirm that the oil regulation ability is somewhat effective. After removing blackheads, I use this as a basic skincare product.

The blackhead removal process definitely slows down. I was okay overall, but the price of Polar's Choice is...

It's too expensive, and the dinner includes Zinc Pichreon, which makes it feel overly dry and strangely sluggish, so I would recommend a product with about 20% Isol or a 10% One Thing product.