Possible mechanism behind "Atkins" style diets

[n2doc]

'Proof' behind high protein diets

Scientists say a gut hormone could explain why high protein diets can aid weight loss.
PYY is released when a person eats protein-rich foods and sends signals to the brain indicating fullness. The Medical Research Council team at University College London believe their findings could help tackle obesity. But dieticians said much more work was needed before people could be advised to make long-term changes to their eating habits.

Many popular diets, including the Atkins, employ high protein foods. Although there has been evidence to suggest high protein diets are effective in achieving and maintaining weight loss, the reasons for this have been unclear. Although PYY was discovered more than 20 years ago, its role is still debated. Dr Rachel Batterham and colleagues have shown that low levels of PYY can result in obesity.

Dietary control

High protein diets lead to highest PYY levels in the body and the greatest curb in hunger in both obese and normal weight people. Overall, however, the PYY levels were lower in the obese individuals than in the normal weight individuals. The associated reduction in appetite was also smaller when the person was obese. The researchers decided to engineer mice that were genetically unable to produce PYY in order to study the long-term effects of a high protein diet. The engineered mice ate more than normal mice and became obese, even when they were offered protein-rich foods. When the researchers gave the mice PYY to treat their deficiency, their food consumption went down to normal levels, as did their weight. When they withdrew the PYY treatment, the mice ate more and became obese again.

Long-term commitment

The researchers said small tweaks to meals - a couple of spoonfuls less of potato and an extra slice of meat - could make a difference. Dr Batterham said: "We have proved that if you do not have PYY you become obese, and if you give it back then you lose the weight again." She said the next step was to do longer studies in humans. "It's not a diet that you would go on for a few months. You would go on it for life. "We need to check that it would be compatible with lifestyle and look at the safety aspect."


http://news.bbc.co.uk/2/hi/health/5302054.stm

[saracat]

1. It has worked for me! And I have added back fruits and yogurt and

LC tortillas. I lost 55 pounds and have kept it off for two years. I just don't eat sugar and grain at this point! It amazes me how many refuse to even try this way of eating and think it is unhealthy! I have never eaten so "healthily" in my life. I eat more fruit and veggies than ever before! And lots of Greek yogurt. And yams and sweet potatoes.

[phillinweird247]

2. Same hear........

I'm on a starch free diet to conrtol inflammation for ankylosing spondylitis (Arthritis of the spine)
and I eat and feel way healthier.no grain no pain I'm convinced humans were never meant to eat grains but thanks to agriculture this has become the norm. boss coming got to cut it short!!