One thing I find about fitness and nutrition information, is you need to, as people say, take it with a grain of salt. One article may say one thing, while another may say something else. I've found to get as much info as I can, and make my own decisions.
This is an interesting read. If you've kept your New Year's Resolution to get in shape and need some questions answered, or have got frustrated, given up, and need a kick, check this out: