Instead, he favoured voluntary medical insurance and public health testing.

[1] He wrote the Preface for Lloyd Paul Stryker's Courts and Doctors, published in 1932.

[1] In 1937, Heyd was awarded honorary degree of doctor of science by Temple University.

[8] Heyd's comment has been widely cited in anti-fluoridation literature as an argument from authority because he was a former President of the AMA.

[7] However, Heyd was President of the AMA for two years in the 1930s long before evidence of the effectiveness from fluoridation was available to examine.