Healthy Eating Archive

A healthy diet is key to a healthy gut microbiome, which helps the immune system function well and reduces chronic inflammation among other important tasks. And increasing evidence suggests that fiber and fermented foods can play important roles in gut health.

New guidelines for managing atrial fibrillation focus on lifestyle habits to prevent and control the disorder. One recommendation is for people to limit alcohol to one drink per day, or ideally less. Another is for people who are overweight or obese to lose weight, either by striving for a body mass index no greater than 27 or by shedding at least 10% of their body weight. The guidelines also suggest that people get three to four hours of exercise per week. And people with afib who snore should consider getting tested for sleep apnea.

Every bodily function relies on protein. People's protein needs are based on age, body size, activity levels, and overall health. Harvard experts advise people to consume between 1.2 and 2.0 grams of protein each day for every kilogram (2.2 pounds) of body weight. Women need more protein at certain times, including pregnancy and breastfeeding. People who are competitive athletes or trying to build muscle should also eat higher amounts of protein. Older adults should consume higher amounts to combat age-related muscle loss.

A 2023 study suggests that avoiding low-quality carbohydrates such as refined grains, sugar-sweetened drinks, and starchy vegetables may help middle-aged adults avoid weight gain.

In a 2024 study, people who reported eating plant-based diets were 39% less likely to have had COVID-19, compared with people who said they were meat eaters.

Whole or minimally processed foods tend to be best for heart health. But many processed foods—and even some that are ultra-processed—are also good options, provided people choose wisely. In three large studies, ultra-processed whole-grain bread, breakfast cereals, and yogurt were linked to a lower risk of type 2 diabetes and cardiovascular disease. Artificially and sugar-sweetened beverages, processed meats, and ready-to-eat dishes were linked to higher risks of those conditions.

Men's diets should include plenty of whole foods like fruits, vegetables, legumes, and whole grains, while avoiding high amounts of processed foods. However, men should be mindful about reading food labels when shopping to ensure they get more of the healthiest nutrients and much less of certain substances. In particular, men should focus on adding more fiber and decreasing their intake of sodium and added sugar.