What did the researchers do? They wanted to see if high carb, low fat diets we're actually as healthy as believed and whether they actually helped people lose weight. They also looked at calorie levels and wanted to see if increasing calories increased weight gain. Alongside this they compared the results to a high fat diet with an increase in weight. I bet you're all thinking pretty much the same - low fat, low calorie = weight loss and health increase. Wrong!
Just as we advise all our clients to avoid high carb foods, eat more fat and don't worry about the calories the researchers found this to be the best way to lose weight and increase health and fitness. The low fat diet caused the subjects to put weight on and also messed around with their blood levels more than he high fat diet. How? Basically high carb means your body will be exposed to high levels of glucose (carbs get broken down into this). High level of glucose = high insulin levels = glucose stored in body as fat. Also, high insulin for a long period of time will lead to insulin resistance and diabetes. High carbs for a prolonged period of time are now thought to be more of a cause of heart disease than high fat in our diet. This is what we've been advising our clients for a long time now.
On the other hand the high fat diet helped people lose weight, even when calories we're increased way beyond the 'normal' recommended values. How? Insulin is key again. High fat means less carbs which in turn means less insulin. This means less sugar is being stored as fat in your body. What happens to the fat you eat? Well, unlike carbs a large proportion of it is used to build you body - your brain, some hormones and your nerves all require vast quantities of fat to function correctly (another concern about the low fat diet!). What's left is used as a preferred energy source, rather than sugar. Very little gets wasted or dumped into storage, which is what happens to carbs.
There are many other benefits to high fat diets too including better vitamin levels, prevention of brain diseases and it's even been shown to reduce the propensity of things like strokes! Yes, high fat diets have shown to reduce stroke likelihood.
Now I know this is completely against the current healthy eating advice from our government, but that hasn't changed in the last 60 years really, and in the last 60 years obesity, diabetes and heart disease keep rising. I wonder why???
Do a bit more research yourself or ask me some personal questions if you want to know more. One of the keys is avoiding highly processed fats like vegetable oils. Just as in my normal advice - processed food is generally bad, natural food is general good.