Also, most people get less sunlight in the winter. That is a problem because the sun is a major source of vitamin D, which is essential for immune system health. Physical activity, another factor, ...
Increases in U.S. Life Expectancy Forecasted to Stall by 2050, Poorer Health Expected to Cause Nation's Global Ranking to Drop Dec. 6, 2024 — The U.S. is forecasted to fall in its global ...