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What active ingredients can be used together? How to determine an active ingredient in a product and why does pH play an important role? Today, everything you need to know about combining the main active ingredients in skin care. #combinationofingredients __________________________________________________________ ➤ I'm on Instagram: / katya.novotochina ➤ Guide to acids: • ACIDS FOR THE FACE Guide to AHA, BHA and... ➤ How to choose salicylic acid: • How to choose SALICYLIC ACID BY TYPE... ➤ Vitamin A and retinoids: • VITAMIN A for the face: retinol, retinoic... _________________________________________________ ☑️ Discounts and coupons (if you want to give both yourself and me a gift, you can use my codes when purchasing ????): Iherb: 5% with code AOT7524 ☑️ Products from the video: Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant http://bit.ly/324xrap COSRX BHA Blackhead Power Liquid: http://bit.ly/2F7DPDC ☑️ Time codes for the video: 0:00 What is this video about? 1:10 How to determine the asset in a product 2:00 Main types of assets 3:35 Why you can’t combine some products 4:19 Concentration of ingredients 8:41 pH level of products 10:25 How to combine assets with each other _________________________________________________