Interesting claim(s) indeed coming from PhD graduate Linda Bacon. Here they are:
Claim 1: On average "overweight" people live longer than "normal" weight people.
True or false? False.
“Being overweight can extend life rather than shorten it,” spiked the headlines of The Independent on the 2nd of January 2013. A study was published in the peer-reviewed The Journal of the American Medical Association and concluded:
Grade 1 obesity overall was not associated with higher mortality, and overweight was associated with significantly lower all-cause mortality.
National Health Service the healthcare system for England found that the study was "limited" and said:
The bottom line is that being obese (all categories combined) increased the chance of dying compared to those with a normal BMI. This was not the case for overweight individuals or the lowest category of obesity (grade 1) on its own.
It is important to consider that individual risk factors for developing disease and death will vary person to person and BMI is only one of many measures used to assess the risk of developing disease in the future.
Even if you choose to ignore the limitations of this research, it would be unwise to interpret its findings as proof that being overweight is ‘healthy’ – rather it may be slightly less unhealthy than perceived.
Long story made short, being overweight isn't necessarily an unhealthy thing. However, the Phd graduate didn't make a distinction between correlation and causality.
Correction of the claim: "Overweight" people might live longer than "normal" weight people.
Claim 2: No study has ever shown that weight loss prolongs life.
True or False? False.
According to rbmc.org:
A new study recently reported in the Journal of the American Medical Association finds that weight loss surgery appears to prolong life for severely obese adults. Among 2,500 obese adults who underwent bariatric surgery, the death rate was about 14 percent after 10 years compared with almost 24 percent for obese patients who didn’t have weight-loss surgery, researchers found.
Additionally, Weight-loss surgery appeared to prolong life for severely obese adults, a new study of U.S. veterans found here.
Correction of the claim: Some studies suggest that weight loss (resulting from surgeries) might prolong life.
Claim 3: Biology dictates that most people regain the weight they lose, even if they continue their diet and exercise programs.
True or false? True.
Source: Approximately 10-20% of subjects are able to maintain a weight loss of at least 5% after 5 years
Another research: The results of other research also look grim; five years after completing structured weight loss programs, people only maintain a 3% weight loss.
In-depth article I recommend.
Claim: Eat what you want, when you want choosing pleasurable foods that make you feel good.
Implying that fast (or comfort) food is okay after alleging the following claims isn't made of good faith. Whether it makes you fat or not, fast (sugary or comfort) food is still as unhealthy as ever. Skeptics are well aware of temporal trends in fast-food restaurants, sodium, saturated fats, and trans fat content. If you eat what you want, you might risk yourself to type 2 diabetes and other endless diseases. It's important to realize that a large number of diseases are directly attributable to obesity.
People get quite literally being deceived into destroying their health potential by junk food companies seeking revenue or people selling books advocating in eating whatever you want and choosing pleasurable foods that make you feel good.
This answer has been tweeted to Dr. Bacon.