any fun sized chocolate bar instead of fun sized-snickers bar?
In terms of GI, this swap is not appropriate. The nuts in the Snickers fun size bar help to lower the GI, so other fun size bars will affect blood glucose in different ways. However, in terms of calories, most fun size bars are quite similar. So, the general rule is make such swaps only on occasions, so you are better able to keep to the GiP rules.
