The Ordinary Niacin Serum

This is The Ordinary Niacinamide 10% + Zinc 1% 30ml. I’ve gone through quite a few bottles of this, and it’s a great serum to use in spring, summer, and autumn. The Ordinary promotes it as a sebum-controlling tone-up serum, but honestly, I don't really notice any tone-up effect; however, when used during seasons with active sebum production, it does reduce oiliness a bit compared to other products. Although I haven't felt any dramatic results yet, the reason I continue to use it is its reliable active ingredient content, clean texture, and good value for money. Since I’ve rarely seen actual results on blemishes or skin tone from products claiming to have whitening functions, I’m using this just as a preventative measure, and I’m satisfied. When I first used it, it felt a slight stinging sensation, but I got used to it quickly and it was fine. It comes in two sizes, 30ml and 60ml, but personally, I recommend the smaller size. As you use it, the contents can get a bit thick, and white residue tends to dry and stick to the opening. I think it’s better to just use the small size cleanly and open a new one. The Ordinary's biggest strength used to be its value for money, so it's annoying that they keep gradually raising the prices, but since the price is still reasonable, I think I'll keep using it for a while.