From: www.mendosa.com/insulin_index.htm

"When both have been tested together, the glycemic index is extremely good
at predicting the food's insulin index. In other words, a low-GI food has a
low insulin index value and a high-GI food has a high insulin index value.
Furthermore, the level of glucose in the blood is directly related to
adverse reactions such as protein glycosylation (linkages between glucose
and protein) and oxidative molecules.

There are some instances, however, where a food has a low GI value but a
high insulin index value. This applies to dairy foods and to some highly
palatable energy-dense "indulgence foods." Some foods (such as meat, fish,
and eggs) that contain no carbohydrate, just protein and fat (and
essentially have a GI value of zero), still stimulate significant rises in
blood insulin.

At the present time, we don't know how to interpret this type of response
(low glycemia, high insulinemia) for long-term health. It may be a good
outcome because the rise in insulin has contributed to the low level of
glycemia. On the other hand, it may be not-so-good, because the increased
demand for insulin contributes to beta-cell "exhaustion" and the development
of type 2 diabetes. Until studies are carried out to answer these types of
questions, the glycemic index remains a proven tool for predicting the
effects of food on health."

Thankfully, Mendosa has revised his web site www.mendosa.com/ and includes
the glycemic *load* (in addition to the glycemic *index*) of foods:

"The glycemic load (GL) is a relatively new way to assess the impact of
carbohydrate consumption that takes the glycemic index into account, but
gives a fuller picture than does glycemic index alone. A GI value tells you
only how rapidly a particular carbohydrate turns into sugar. It doesn't tell
you how much of that carbohydrate is in a serving of a particular food. You
need to know both things to understand a food's effect on blood sugar. That
is where glycemic load comes in. The carbohydrate in watermelon, for
example, has a high GI. But there isn't a lot of it, so watermelon's
glycemic load is relatively low."
source: http://members.lycos.co.uk/ramendosa/gilists.htm

Rob