Which ingredient helps the look of blemished-looking skin?

For blemish-prone, congested-looking skin, a few ingredients pair well. Salicylic acid is oil-soluble, so it concentrates inside the sebum-rich pore lining and loosens the bonds between dead cells (a desmolytic action), which helps refine the look of pores and the appearance of blackheads and whiteheads. Azelaic acid supports a calmer, clearer-looking complexion: it is bacteriostatic, helps normalize the shedding of cells that line the pore, and calms the look of redness. Niacinamide adds a soothing, anti-redness quality that supports the look of reddened, blemish-prone skin. Introduce one active at a time, keep to a daily sunscreen, and see a doctor if breakouts are persistent. The concentration that matters is in the app. This is cosmetic reference for the look of skin, not treatment advice.