Add 2 drops of the serum to your moisturiser for beginners or sensitive skin. Experienced users can apply 2-4 drops of the serum after face wash and follow up with a moisturiser. Use 3 times a week or daily. Can also be used as a spot treatment 2-3 times a day.
Note : Not suitable for dry acne prone skin as BHA is drying to the skin. When skin gets dry or when the skin barrier is damaged, Actives don't work as intended. So follow up with a moisturiser or a few drops of Squalane (it is non comedogenic light oil). Also you can increase frequency of use if it doesn't dry your skin and decrease frequency if it dries your skin. Can be used in the morning too if needed.
Note : As it is a product with actives that is completely free of any oils / emollients, it's important to add a few drops of your favorite oil or Squalane (it is non comedogenic). Or follow up with a fatty moisturizer. This is especially important if you have dehydrated oily skin or damaged barrier to avoid any chance of irritation from active ingredients.