Here are five that lead to diet and health failure. 

I love all of them because, sadly, most people believe them. And, in my presentations and books, I enjoy debunking each one.

Here we go ...

1. Eat Less, Exercise More

Truth ... this lie has led to a tremendous amount of deprivation. Oh yeah, and try exercising off that fast-food lunch. Call me after your two-hour jog. Sadly, many nutritionists perpetuate this lie. A favorite saying of mine: If I'm hungry, I eat and don't think twice about calories. I got this saying from someone who practices healthy eating.

2. Everything in moderation

Truth ... When it comes to food intake, this word has no definition. Moderation to you might be excess to someone else. Most people who struggle with their weight tell me: "Everything in moderation." Replace moderation with rarely or occasionally. 

This weekend, I had the most amazing corn-beef sandwich - flown in from Carnegie Deli. The great news: When you indulge rarely, no harm/no foul.

3. It takes willpower to lose weight

Truth: No it doesn't. How long can your willpower last? Not too long. Dr. David Katz says it takes skillpower. No doubt, just a few skills will go a long way. 

Here's one of my favorite quotes: Good habits are as addictive as bad habits and a lot more rewarding. Changing a few bad habits will go a long way.

4. Eating food with health benefits is expensive

That's not a lie ... it's Bull$&!%. A day of healthy eating can cost about 11-bucks. Come on, most people pay about half that for their latte-capa-frappochino.

5. Americans have the best health care and we live longer

Truth: Watch about one minute of this video.

Bonus Myth: I wrote Feed Your Head at my local Dunkin Donuts. Its slogan: America Runs on Dunkin.

Truth: While its donuts might taste great, America gets fat on Dunkin.

Want to learn more? Just sign up for 101 Incredible Diet, Health, and Lifestyle Tips. When you do, you will get Feed Your Head at no additional charge.

In an article - Scapegoats, Saints, and Saturated Fats: Old Mistakes in New Directions - written by Dr. David Katz, he observes:

"In the past 30 years in the U.S. the proportion of energy from consumed fat has fallen from 40% to 30% (although absolute fat consumption has remained the same), yet obesity has rocketed."

The author of the commentary, Dr. Malhotra, adds the “yet” at the end of this line as if to indicate this is a surprise outcome. We cut dietary fat, but got fatter! But in implying this, he also seems to be implying that he failed to read what he just wrote. Re-read his line.

If the percent of calories from fat went down, but total fat intake did not (this is exactly what he is saying, and yes, it is true)- it leads inexorably to only one conclusion: total calorie intake went up, diluting down the percent of calories coming from fat. Can you imagine not rolling your eyes at a statement, pretending to be provocative, that read: “our calorie intake went up and yet we got fatter!” The only reasonable reaction to that assertion is: duh!

It seems pretty clear that most journalists covering this story ignored the implications of this line. But more surprisingly, the author himself ignored the implications of what he wrote. We never really cut our fat intake-we simply diluted it as a percent of total calories by eating more sugar and starch. So we kept the saturated fat, replaced some of it in time with trans fat, and applied a generous icing of starch and high-fructose corn syrup. And yet, amazingly, we didn’t wind up healthier. Well then, yes, clearly saturated fat must be good for us! Or not.

I have listened to and watched much discussion about the Obamacare website. Ironically, comedienne Jon Stewart has the best analysis.