As far as I know NUUN has never used any artificial flavors or colors….. the reformulation looks like they've replaced the sorbitol with dextrose and are using monk fruit and stevia as sweeteners now. I'm not a big fan of stevia as I taste it as leaving a rather nasty aftertaste even when present in relatively small amounts, so the new NUUN may not please me. I don't know about monk fruit, I'm not sure if I've ever tried anything with it.