1. Manganese
Manganese, while necessary in small amounts, can lead to severe neurological issues when consumed in high doses. "High levels of manganese can actually lead to Parkinson’s-like symptoms like tremors," Love cautions. He references the National Institutes of Health's guidelines, stating, "The upper limit for manganese is 11mg a day for healthy adults, so make sure you stay well below that level." Monitoring manganese intake is crucial to avoid these potentially debilitating effects.
2. Iron
Iron is an essential mineral, but high doses can have adverse effects on the brain. "High levels of iron can lead to memory loss, as well as loss of cognition, and iron in excess amounts actually increases aging," Love explains. He advises that iron supplements should only be taken if a blood test confirms a deficiency. "Unless you’ve gotten a blood test that has tested you low for iron, you probably don’t need an iron supplement," he states. Love notes that while some individuals, such as vegans, may benefit from iron supplementation, most people do not need it. All in all, it's always best to get your iron directly from the foods you eat.
3. Copper
Copper is another mineral commonly found in multivitamins, but excessive copper can be harmful. "High levels of copper actually increase free radicals and this can cause oxidative stress and damage in your brain," Love warns. To counteract the negative effects of copper, he recommends ensuring adequate intake of zinc, either through supplements or zinc-rich foods. "Zinc actually counteracts the free radicals of copper and that helps protect your brain," Love explains, highlighting the balancing act required to maintain optimal brain health.
Bottom line
Navigating the world of nutritional supplements can be challenging. Dr. Robert Love's warnings about manganese, iron, and copper emphasize the importance of moderation and the potential risks associated with excessive intake. By staying informed and adhering to recommended guidelines, individuals can make safer choices that support long-term cognitive health. Remember, when it comes to supplementation, more isn't always better, and maintaining a balanced approach is key to preserving memory and preventing neurological decline.