This is something else you may stumble upon and I should point out that it is an emerging study - I am sure there will be more information coming to light at the time of publishing this book. Metabolic Syndrome or Syndrome X was first noticed in 1988. It is a collection of symptoms that came to be first known as Syndrome X, and then was referred to as Metabolic Syndrome. The WHO already has an MS (multiple sclerosis) and didn't like the sound of SX - they want it to be referred to as Insulin Resistance Syndrome (IRS), but here in Australia we call it Metabolic Syndrome or Syndrome X. Basically, this is a condition where the person has abnormally high BSLs and insulin in the blood all the time. The problem is that the cells are not accepting the sugar.
This is commonly seen in obese or overweight people who also present with high cholesterol and triglycerides levels and hypertension (high blood pressure). What happens is when the person is pumping out lots of insulin, usually because of eating high GI carbs all the time, the body gets tired of being bombarded with the glucose and the insulin and starts to resist it. The glucose and insulin just float around in the blood instead of being absorbed and you are left with abnormally high insulin and blood sugar levels all the time. So how does this apply to the GI if you have this condition? In the short term, it means the difference between a person who can eat plenty of moderate carbs and still have the weight come off and a person who finds the weight comes off slowly or not at all.
Occasionally on our website forum, we will have a person who eats lots of moderate carbs and seems to be able to bend the rules and not have it affect them. This sort of person probably does not have this condition. However occasionally there's a person who does everything right, but may be leaning a little more towards the moderate carbs. In some cases this sort of person can plateau or find their weight loss hang or slow for no obvious reason. This is usually because the person is affected by metabolic syndrome and the result is they get a slightly higher rise in the BSLs than normal. What this means in real terms is that, if the safety margin for moderate carbs is a GI of 50 or below, this person may find that their personal safety margin may be 40 or below.
In practice that's the reason behind 'being moderate with the moderate carbs, just in case a person goes overboard and starts eating tonnes of moderate carbs to compensate for the lack of sugar in their diet and brings themselves undone. If the person has Metabolic Syndrome then they are getting more 'bang for your buck' when they eat moderate carbs. They have to take it easy with the moderate carbs and eat more of the low GI or excellent carbs.