Here's a nutshell answer from Dr. Oz to the question of why we* gain weight after reaching fifty or if not gaining weight, finding it harder, much harder to lose weight than it was in our 20s,30s, & 40s:
By age 50, you’re burning 200 fewer calories every day than you did at age 30. This is caused by estrogen loss that occurs during menopause. Unfortunately, your body turns to alternative sources, such as fat cells in the belly, which can produce estrogen. Fat cells grow bigger, resulting in an expanding waistline. ...Women in their 50s need to consume alternative sources of estrogen, like phyto-estrogens, such as flaxseed.On this same topic is an excellent post about this very thing over at Cranky Fitness.
* Women, that is. Men can blame their expanding waistlines at any age on beer.


