The Good: Generally based around whole foods. Good quality sources of protein (meat and fish), carbs (mainly vegetables) and fats (nuts, seeds and oils). I doubt anyone will disagree that’s a pretty solid foundation of any healthful diet. Filling your plate with each of those in relative proportions most of the time will probably see you losing weight without doing anything else.
The Bad: The complete avoidance or exclusion of certain foods, or food groups. Foods that potentially have healthful benefits such as grains and dairy. The goalposts for this diet also seem to move regularly, with regards which foods are deemed ‘paleo approved’. The Stupid: There’s a whole market that exists on ‘paleo approved’ versions of commonly wonderful tasting foods. Some of these concoctions, will not only leave you craving the actual thing, but some actually run higher in calories (and sugar) than their ‘less healthy counterparts. We’ll also blame cavemen for propping up the ‘gluten-free’ industry.