Ingredients for the Parsley Collagen Mask 1 handful of fresh parsley 1 tablespoon of natural yogurt (plain and unsweetened) 1 teaspoon of fresh lemon juice 1 teaspoon of olive oil or honey (for optimal hydration) How to prepare and use the mask Preparing the parsley Wash the parsley thoroughly and chop it finely. Using a spoon, mash it into a paste or blend it until smooth. Mix the ingredients Add the yogurt, lemon juice, and olive oil (or honey) to the parsley puree.