Frederik Holst (1791–1871) was a Norwegian medical doctor. He was the first person to defend his doctoral thesis in Norway, in 1817, about the then common and now extinct skin disease "Radesyke".[1][2] He is regarded as an important pioneer in medicine in Norway.[1] He was appointed town physician in Christiania from 1817, and professor from 1824. His works had significant influence on the treatment of prisoners and of patients with mental disorders.
In 1831, he was elected a member of the Royal Swedish Academy of Sciences.