Sucaryl. I just did some minor research to see if it was still being produced, but no, not in the United States. You can however find it in other countries. I don't use much sugar, but I use real organic sugar when I do use it. All of these artificial sweeteners make me cringe. But back to the suit, love the stripes and it fits her so beautifully, don't you think? One of the advantages of authentic vintage swimwear is accentuating your curves in a sexy but modest way.