It’s certainly true – at least in theory and sometimes in practice – that all calories are created equal. “From the standpoint of body weight,” adds Marion Nestle, PhD, of NYU, “a calorie is a calorie no matter what it comes from. You can gain weight eating too much healthy food as well as unhealthy. From the standpoint of health, it’s better to eat your veggies…. It’s just a lot easier to overeat calories from junk food than healthy food. But it can be done.”
Just 10 extra pounds add 40 pounds of pressure on your knees and other lower body joints. That can wear them out quicker. Extra fat can also cause inflammation -- when chemicals in your body damage your own tissues over time, including your joints. Losing even a little weight can ease these effects. If you keep it off, you’re much less likely to get arthritis later in life.