Welcome to a new year and a new decade that offer both opportunities and challenges in your pursuit of healthy living. 

 The foundation for vibrant health is a healthy immune system, and writer Julie Peterson focuses on the nutritional factors that go into building one in “Gut Check: Feeding the Immune System.” 

 Physical fitness is especially top of mind in the new year, and readers that have previously struggled to shed post-holiday pounds may be surprised (and pleased) to discover that moderation may be the key to burning fat. In “When Workouts Don’t Work: Why Less Is Sometimes More,” writer Marlaina Donato explains how stress-free exercise can deliver better results by optimizing the response of cortisol, a steroid hormone that plays a critical role in regulating metabolism. 

 The mind-body connection takes center stage in writer Ronica A. O’Hara’s take on “Eco-Therapy: Beyond the Nature Cure.” The physical benefits of spending time in nature are well documented; now a number of new studies suggest that nature-based interventions may serve as an effective alternative or additional form of treatment for a range of emotional and mental health issues. 

 Our focus on planetary health will complement our ongoing commitment to leave no stone unturned in all facets of personal health. This month, the eternal quest for the fountain of youth leads us to examine the factors that contribute not only to living long but living well. Writer Melinda Hemmelgarn’s January feature looks at the role of genes, environment and lifestyle factors; she offers age-defying strategies—from diet, exercise and sleep, to protecting your telomeres and adjusting our attitudes. 

 Here’s to a prosperous, productive and very healthy New Year! 

 Rebecca Young