Copied from another posting of this article:

The headline (and the article for that matter) are very sensationalist and I don’t think they’ve presented this in a balanced way. They are discussing how sorbitol behaves in zebrafish with limited data presented on human biochemistry, and they discuss it in a vacuum without quantifying the amount of sorbitol it takes to cause a problem. Yes, any substance in excess can be harmful, but the amount of sorbitol in food compared to the amount of high fructose corn syrup makes it the substantially lesser evil. The artificial sweeteners are vastly more potent than actual sugar, so you don’t need very much of it to get the same amount of sweetness. High fructose corn syrup is used in massive amounts in food and is much worse for you on the scale that either substance would be consumed.