Aside from preservatives and detergents, there are many other ingredients in hair products that can cause skin problems for some of us—even natural, edible ingredients can be irritating. This is a short list of common irritants:

  • Fragrances/perfumes
  • Propylene glycol (PG)
  • Polyethylene glycol (PEG)
  • Polyquaternium(s)
  • Artificial colorings
  • Hair dyes
  • Herbal extracts and essential oils, henna
  • Acids (i.e. salicylic acid, acetic acid)
  • Proteins, hydrolyzed proteins, amino acids, peptides, plant starch