Which is more effective: adapalene gel or salicylic acid?
Generally speaking, it is not accurate to simply compare which is better between adapalene gel and salicylic acid. For treating mild to moderate acne, adapalene gel usually offers superior efficacy; whereas for improving skin roughness, blackheads, or mild keratin buildup, salicylic acid may be more suitable. The detailed analysis is as follows:

For mild to moderate acne accompanied by comedones (blackheads and whiteheads) and inflammatory papules, adapalene gel is generally more effective. This type of acne is associated with abnormal follicular keratinization and inflammation. Adapalene gel helps regulate keratinization of hair follicles, reduces the formation of microcomedones, and also has anti-inflammatory properties. With consistent use, it gradually improves acne symptoms and is suitable for long-term acne management.
For rough skin texture, enlarged pores with blackheads, or mild accumulation of dead skin cells, salicylic acid may be a better choice. Salicylic acid is lipid-soluble, enabling it to penetrate deeply into pores, dissolve excess oil and debris, soften dead skin cells, and effectively address blackheads and skin roughness. It gently clears pore blockages and provides more targeted treatment for these specific skin concerns.
When cleansing the skin, use a gentle facial cleanser and avoid excessive scrubbing. Choose lightweight, hydrating skincare products according to your skin type to maintain a healthy balance of oil and moisture. Always apply sunscreen when going outdoors during daytime to minimize UV-induced skin irritation. While using these products, the skin may become more sensitive. It's recommended to gradually build tolerance, and if any discomfort occurs, discontinue use immediately and consult a dermatology professional.