Aaron Hengist, PhD (he/him/his)

Postdoctoral Visiting Fellow
National Institutes of Health
Bethesda, Maryland, United States

Aaron Hengist is a Postdoctoral Visiting Fellow at the National Institute of Diabetes and Digestive and Kidney Diseases Intramural Research Program. His research focuses on human metabolic physiology and energy balance in response to dietary and lifestyle interventions, with a particular focus on macronutrient manipulation. His work integrates tightly controlled inpatient feeding studies with free-living interventions, incorporating metabolic phenotyping, indirect calorimetry, stable isotope tracers, and continuous biowearable monitoring. He is currently leading a randomized controlled trial investigating the metabolic effects of ketogenic diets and nicotinamide riboside, alongside investigating the effects of ultraprocessed food intake and time restricted eating.

Presentation(s):

• (OR07-02-26) Photograph-Based AI Features in Calorie-Tracking Apps Underestimate Energy Content of Meals

  Saturday, July 25, 2026
  4:42 PM - 4:54 PM ET

  Disclosure(s): No relevant financial relationship(s) with ineligible companies to disclose.

• Ultra-Processed Foods and Chronic Disease: Current Research and Future Priorities

  Monday, July 27, 2026
  10:30 AM - 12:00 PM ET

  Disclosure(s): No relevant financial relationship(s) with ineligible companies to disclose.

• Ultra-Processed Foods, Energy Intake, and Obesity Risk: Mechanistic Insights From Controlled Feeding and Neuroimaging Studies

  Monday, July 27, 2026
  10:57 AM - 11:21 AM ET

  Disclosure(s): No relevant financial relationship(s) with ineligible companies to disclose.

• Questions and Answers - Ultra-Processed Foods and Chronic Disease: Current Research and Future Priorities

  Monday, July 27, 2026
  11:55 AM - 12:00 PM ET

  Disclosure(s): No relevant financial relationship(s) with ineligible companies to disclose.