Yes, you can use The Ordinary Salicylic Acid and Niacinamide together in your skincare routine. Both ingredients offer unique benefits for the skin and can be used in combination to address different concerns.

Salicylic acid is a beta-hydroxy acid (BHA) that exfoliates the skin and helps unclog pores. It is particularly effective for oily and acne-prone skin as it can penetrate the pores and remove excess sebum and dead skin cells. Salicylic acid also has anti-inflammatory properties, which can reduce redness and swelling associated with acne.

Niacinamide, on the other hand, is a form of vitamin B3 that offers multiple benefits for the skin. It helps regulate sebum production, improves the skin's barrier function, and reduces the appearance of pores. Niacinamide also has anti-inflammatory and antioxidant properties, making it beneficial for acne-prone and sensitive skin.

When using these two ingredients together, it's important to layer them correctly. Start by cleansing your face and applying the salicylic acid, allowing it to fully absorb into the skin. Then, apply the niacinamide serum on top. The salicylic acid will exfoliate the skin and help the niacinamide penetrate more effectively.

However, it's worth noting that some individuals may experience sensitivity or irritation when using these ingredients together, especially if they have sensitive or compromised skin. If you are new to using these products or have sensitive skin, it's best to introduce them slowly and patch test before applying them to your entire face. Additionally, always follow the instructions provided by The Ordinary and consult with a dermatologist if you have any concerns.