What Can You Do to Keep Your Metabolism High?

Although metabolism does tend to shift with age, decades of research demonstrate that such changes are not set in stone. By regularly checking the key biomarkers that reveal your muscle mass, mitochondrial health, thyroid function, inflammatory status, and glucose regulation, you can detect subtle signs of slowdown and respond with precisely targeted interventions. Below are several evidence-based approaches that, when integrated thoughtfully, can preserve—and even enhance—your metabolic ...

 Iodization of Salt in 1924 Increased American IQs 15 Points

Iodine deficiency is the leading cause of preventable mental retardation in the world today. The condition, which was common in the developed world until the introduction of iodized salt in the 1920s, is connected to low iodine levels in the soil and water. We examine the impact of salt iodization on cognitive outcomes in the US by taking advantage of this natural geographic variation. Salt was iodized over a very short period of time beginning in 1924. We use military data collected during W...