Why can increasing vitamin B1 leave some people dizzy, unusually thirsty, or with a racing heart? This clip explores how thiamine deficiency may disrupt the balance of potassium and sodium inside cells, and why restoring B1 can create a sudden shift in potassium demand. That electrolyte change may help explain some of the unexpected symptoms people report when increasing thiamine.

In 19th-century Japan, polished white rice became a status symbol among those who could afford it. But removing the outer layers of rice also stripped away much of its vitamin B1. This clip explains how heavy reliance on polished rice became associated with beriberi, including swelling and serious cardiovascular problems, revealing how food processing can turn a staple food into a nutritional problem.

Digestive symptoms don't always mean the digestive organs themselves are the root problem. Your stomach, pancreas, and other digestive organs rely on signals from the brain to know when to produce acid, enzymes, and other digestive secretions. This clip explains why treating the gut alone may miss the system controlling it.