I am thinking about adding apple cider vinegar to my Physiogel Dermo cleanser which has the following ingredients: Aqua, PEG-75, Cetearyl Alcohol, Disodium Phosphate, Sodium Cocoyl Isethionate, Methylparaben, Citric Acid, Butylparaben, Propylparaben, Parfum.
Let's say I mix 1tablespoon of apple cider vinegar to a 150ml physiogel bottle. Will the ph level of it drop and will it syill be safe to use on facial skin?