TurnBackClock’s assessment is inspired by established healthy-aging research and public-health guidance. The scoring system itself is an educational model created for this website — it was not developed or validated by the organizations listed below.
- World Health Organization — Healthy Ageing and Functional Ability
https://www.who.int/news-room/questions-and-answers/item/healthy-ageing-and-functional-ability - WHO — Promoting Physical Activity and Healthy Diets for Healthy Ageing
https://www.who.int/europe/publications/i/item/WHO-EURO-2023-8002-47770-70520 - National Institute on Aging — What Do We Know About Healthy Aging?
https://www.nia.nih.gov/health/healthy-aging/what-do-we-know-about-healthy-aging - NIA — Health Benefits of Exercise and Physical Activity
https://www.nia.nih.gov/health/exercise-and-physical-activity/health-benefits-exercise-and-physical-activity - NIA — Healthy Eating, Nutrition, and Diet
https://www.nia.nih.gov/health/healthy-eating-nutrition-and-diet - NIA — Sleep
https://www.nia.nih.gov/health/sleep - WHO — Social Connection and Loneliness
https://www.who.int/health-topics/ageing/reducing-social-isolation-and-loneliness-among-older-people