Wednesday, February 26, 2014
Monday, February 24, 2014
Tuesday, February 18, 2014
When you first take a bite of sugary cereal, your taste receptors that respond to sweetness, found at the tip of your tongue, send a signal to the portion of your brain called the cerebral cortex.
This signal activates ‘the reward system’ and causes you to want to take another bite. Excessive activation of this reward system, Dr. Avena suggests, can cause ‘loss of control, craving and intolerance to sugar.’
Monday, February 17, 2014
and adverse effects on cardiometabolic risk factors, the harm seen is
generally no greater than that seen with glucose (with the same few
exceptions), as long as the comparison remains matched for the excess
Friday, February 14, 2014
The basic premise
The Carbohydrate Hypothesis, as attacked by Guyenet, looks basically like this:
Excessive amounts of carbohydrates (especially refined carbs / sugar) increases insulin and results in fat gain.
Guyenets argues in his post that carbs are not necessarily the cause of increased insulin, and insulin certainly do not result in gaining weight (maybe the opposite!). Basically he says that while low carb works, the theory to explain it is wrong.
However, as every doctor who has ever treated diabetics with insulin (and their patients) probably knows, injecting insulin certainly does tends to increase fat gain. And in untreated type 1 diabetics, with no insulin, weight plummets. Guyenet does not mention that.
Thin people usually have low insulin levels, obese people usually have high levels of insulin. Guyenet does not believe that is significant.
In short: Carbohydrates drives insulin, which drives fat.