What can cause an allergic reaction to hair products?

Certain hair products can indeed cause allergic reactions, particularly those containing specific chemicals. Hair color chemicals, for instance, often include compounds like para-phenylenediamine (PPD) which are well-documented for causing allergic responses in sensitive individuals. Fragrances added to hair products can also contain allergenic substances that provoke skin reactions.

While natural ingredients and organic oils may seem less likely to cause allergies, they can still lead to reactions in some individuals, particularly if they are sensitive to certain plants or essential oils. Silicones are generally well-tolerated and are not commonly associated with allergies. Therefore, the presence of hair color chemicals and certain fragrances in hair products is the primary concern when it comes to allergic reactions, making it essential for both stylists and clients to be aware of ingredient safety in hair care.