Jessica is a former writer and editor at Forbes Health with over a decade of experience in both lifestyle and clinical health topics. Before Forbes Health, Jessica was an editor for Healthline Media, ...

Learn how to calculate your calorie needs, create a sustainable deficit and lose weight without sacrificing muscle ...

Q: How many calories a day do I need to take in to gain mass and still not gain excess weight? I’m 16 and weigh 180 pounds. I train four or five days a week and have been gaining well over the past ...

You may have noticed that as the years go by, you either need to eat less or move more to feel and look your best. That's because calorie requirements change by age, with your metabolism beginning to ...