Trichology Course aimed at practitioners who desire more knowledge about hair but do not want to become fully qualified trichologists. This is offered by home-study but also taught in America and Singapore. A Chinese version of this course is available. Registered members of the IAT can use the letters "IAT" after their name. Members are controlled by a code of ethics. Trichology Trichology is the branch of dermatology that deals with the scientific study of the health of hair and scalp. Trichologists are hair and scalp specialists (one type of skin specialist) who diagnose the causes of hair fall, hair breakage,
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"