Sulfates (SLS & SLES) These harsh detergents strip natural oils, causing dryness, itchiness, and irritation.
Parabens Preservatives like methylparaben and propylparaben can disrupt hormones and trigger allergic reactions on the scalp.
Alcohol (Denatured & Isopropyl Alcohol) Found in many styling products, these alcohols dry out the scalp, leading to flaking and sensitivity.
Fragrances & Synthetic Perfumes Artificial fragrances contain chemicals that can cause itching, redness, and even allergic reactions.
Formaldehyde-Releasing Preservatives Ingredients like DMDM hydantoin and diazolidinyl urea release formaldehyde, a known scalp irritant.
Propylene Glycol Commonly used in shampoos, this ingredient can cause scalp inflammation and allergic reactions in sensitive individuals.