Even marshmallows, if they're made with only regular corn syrup and not high - fructose corn syrup, should be okay in moderation, since corn syrup is high in glucose, not fructose. (thehungrycaterpillar.net)
High fructose corn syrup is a particularly processed form of sugar derived from regular corn syrup, and has been pinpointed as a definite contributor to diabetes and obesity (4). (detoxdiy.com)
I used 3 unsweetened and one semi-sweet square and regular corn syrup as that's what I had on hand. (myrecipes.com)