Angel Planells, registered dietitian nutritionist; national media spokesperson, Academy of Nutrition and Dietetics.
James Powers, MD, Vanderbilt University Medical Center, Nashville; associate director, Tennessee Valley VA Geriatric Research, Education & Clinical Center (GRECC).
U.S. Department of Agriculture and U.S. Department of Health and Human Services: Dietary Guidelines for Americans, 2020-2025, 9th Edition, December 2020.
Public Health Nutrition: “Energy requirements and aging.”
Merck Manual, Consumer Edition: “Undernutrition,” “Effects of Aging on the Digestive System.”
National Institutes of Health, Office of Dietary Supplements: “Calcium,” “Vitamin D.”
National Osteoporosis Foundation: “Calcium: An Important Nutrient that Builds Stronger Bones.”
Academy of Nutrition and Dietetics: “Special Nutrient Needs of Older Adults.”
MedlinePlus: “Protein in diet,” “Proton pump inhibitors.”
Ageing Research Reviews: “Hypertension and Aging.”
Cleveland Clinic. “Esophageal Strictures.”