What are Demodex mites? Why do they live in my skin and hair follicles? “100% of people over 18 years of age appear to host at least one Demodex species…” – Research article by North Carolina State University & Fordham University, USA. Most people have never heard of Demodex mites in humans, let alone that they are likely to be responsible for most hair and skin problems. Demodex mites are parasites that live in hair follicles. Studies show the Demodex hair mites to be associated with numerous t