Diet and nutrition Archive

A study published by JAMA Network Open found that people taking vitamin D supplements were less likely to have a cancer that spread from the original tumor site to another part of their body or one that proved fatal. However, this risk reduction was only seen in people who were at a normal weight, not those who were overweight or obese. The study did not find that people who took vitamin D were less likely to develop cancer over all compared with those who did not.

The latest update to the Dietary Guidelines for Americans states that many people are not getting enough of four essential nutrients: calcium, potassium, dietary fiber, and vitamin D. But how much of these nutrients should you aim for and what are some good sources for them?

Some fermented foods contain probiotics, beneficial microorganisms that can live in your intestines. These microorganisms help you stay healthy, potentially improving your immune function and reducing damaging inflammation. Eating prebiotics—high-fiber foods that are a source of nutrition for these healthful microorganisms—is essential to help these beneficial microorganisms grow and thrive.

For decades, high intake of fat was thought to cause weight gain, heart disease, and maybe even cancer. The solution? Go low-fat, which often meant consuming more carbs and more sugar. But nutritionists now suggest people actually need adequate amounts of "good" unsaturated fat, and less "bad" saturated fat, for optimal health. Following popular heart-healthy diets, like the Mediterranean and MIND diets, and making simple dietary changes can help people get adequate amounts of good fats.

People should be cautious about weight-loss diets that restrict a specific category of food (such as carbohydrates, fats, or even animal products) without focusing on the overall quality of the foods. Diets with lots of ultra-processed foods or red meat may contribute to poor heart health. But people can lose weight on less-extreme versions of either low-carb or low-fat diets, as long as they focus mostly on unprocessed or minimally processed foods.

Studies show that people who regularly adhere to the Mediterranean diet lower their risk of cardiovascular disease, many types of cancer, and cognitive decline with age. But it’s possible that this healthy diet can be made even healthier. New research suggests that making the diet "greener" by boosting amounts of dark green vegetables, green tea, and plant proteins high in the micronutrients known as polyphenols offers even greater benefits.

Fatty liver disease is a condition caused by irritation to the liver, and one specific type is triggered by metabolic risk factors. Following a healthy diet can prevent or possibly even reverse it.

People who follow a combination of healthy diet plans that share similar traits may have a lower risk of death from cardiovascular disease and cancer.

There’s no evidence that maintaining a healthy lifestyle will suddenly boost the immune system. However, it’s clear that healthy lifestyle habits contribute to overall health, supporting the body’s ability to fight infections instead of creating new problems. Healthy habits that help maintain a robust immune system include getting seven to nine hours of sleep per night, exercising, reducing stress, eating a healthy diet, not smoking, drinking alcohol only in moderation, maintaining a healthy weight, and getting underlying conditions under control.

Healthier eating starts with food shopping, and supermarkets are full of choices that are both nutritious and less so. But trips to a grocery store don't have to feel overwhelming or be budget-blowing; it just takes a little planning, strategy, and thinking ahead.