A new court trial will rule whether fluoride may have negative cognitive effects. Zinc is the underappreciated workhorse. Ayahuasca makes us die (in the good way). Fiber delays Huntington’s disease symptoms. Ginkgo biloba helps to treat stroke after-effects. And leafy greens could be better than mouthwash.

Every week we discover inspiring, informative, and sometimes shocking health-related news. From new studies to insightful analysis, here is what you need to know this week:

  • Does fluoride added to drinking water negatively affect cognitive functioning? A new trial underway in San Francisco is a groundbreaking battle over whether fluoride decreases IQ, particularly in babies and children. The outcome may determine the future of U.S. public policy regarding the addition of fluoride to drinking water. Science
  • Zinc plays an important and wide-ranging role in our health and wellness. From immunity to wound healing to hormonal health, zinc is often an under-utilized supplement. Frank Lipman M.D.
  • Ayahuasca usage induces personal death subjective experiences that create strong, long-lasting psychological effects. A new study showed that over half of the participants felt subjective personal death during their psychedelic treatment. Frontiers in Psychiatry
  • Dietary fiber can delay the symptoms of Huntington’s disease. A new study reveals that those diagnosed with the disease may be able to utilize diet to reduce symptoms. The researches said: “For the first time we’ve shown that high-fiber intake not only enhanced gastrointestinal function, it also improved cognition and behavior.” Brain, Behavior, and Immunity
  • Ginkgo biloba may help with recovery following a stroke. New research shows that the components of ginkgo biloba, when injected intravenously to patients recovering from clot-based stroke in the first two weeks shows up to 20% improvement when compared to those patients who weren’t treated with the traditional Chinese herb. International Stroke Conference
  • Leafy greens may be better than mouthwash in treating gum disease and other oral health maladies. Ongoing research shows that the nitrates found in leafy green vegetables may have fewer negative side effects combined with the same positive outcomes as traditional mouthwash products. The Conversation