Your comment seems unnecessarily antagonistic.
I'm a bit sorry to come across as rude, but this advice and then your later dismissal of ketogenic diets reflects the extraordinary ignorance that inflicted us with the food pyramid and war on fat 40 years ago.
I'm not sure how I dismissed ketogenic diets (I was on one for a year!) besides calling them a 'fad', which they certainly are.
Understanding and controlling the insulin cycle is key to understanding nutrition and its role in weight control. I tried "eating less" for years before I gave a low carb diet a try and permanently changed the way I ate and thought about food.
This is definitely important! But it might not be necessary, as proven by the fact that people have lost significant amounts of weight without doing so.
If you had actually read the article about which you added a comment, then you would have read a process of discovery paralleled by myself and an extraordinary number of others.
I did read the article, and I'm not sure why you assumed otherwise. Most of my comment runs in parallel with the post (particularly being conscientious about what you do with your body.), though I don't think a process of discovery which leads one to assume multivitamins are 'snake oil' is particularly flawless.