The American Society for Parenteral and Enteral Nutrition (ASPEN) is a US-based professional organization.

Its members include dieticians, nurses, pharmacists, physicians and scientists who are involved in providing clinical nutrition to patients.

[5] ASPEN was founded on June 5, 1975.

[6] It was officially incorporated on November 30, 1976.

[8] The society runs an annual meeting, the ASPEN Nutrition Science & Practice Conference.