Detailed answer

For whitehead-prone skin, a toner containing salicylic acid is highly recommended. Salicylic acid is a beta-hydroxy acid that helps to exfoliate the skin and unclog pores, preventing the formation of whiteheads. It also has anti-inflammatory properties, which can reduce redness and irritation often associated with whiteheads. Look for toners with a concentration of 0.5% to 2% salicylic acid for optimal results. However, it's important to note that everyone's skin is different, so it's advisable to do a patch test and consult with a dermatologist or skincare professional before incorporating any new product into your skincare routine.