If you are one of those yo-yo dieter, you may want to read the issue discussed at Med Journal Watch.

Try to lose weight and you may end up heavier than before; it seems that you must avoid low blood sugar levels in order to prevent the yo-yo.

This is the conclusion of two Canadian studies about blood sugar levels and weight gain.

Read it all at Med Journal Watch.

[In Photo: The Yo-yo Diet Syndrome available from Amazon]