That’s a good point, thistle, but I think there is difference there. People’s beliefs about this have a lot to do with ignorance of nutrition because there is so much conflicting information out there nowadays. It’s hard to know what’s good for you and what’s not. I think that going out of your house each day might technically be a risk, because you don’t know exactly what is going to happen to you each day. Risks are okay. You can’t live without taking at least some risks. The problem lies when you know beyond a shadow of a doubt that something is harmful and you do it anyway, and not for a valiant reason like to save someone else’s life, but only because you simply want what is bad for you. Eating fake sugar (or even real white sugar, for that matter) would be more like looking out your window, noticing that there is an axe murderer on your porch, and opening the door to let him in because you want to see his cute outfit. Bad idea, and most certainly sinful. There is no risk there. There is just plain danger. Fake sugar and white sugar and are always bad. They always do harm, though it may be imperceptible for a while. You don’t necessarily feel sick the first time you eat sugar but over time it weakens your body more and more. Eventually you get diabetes or cancer or heart disease or whatever. Granted, it’s not the same level of danger as the axe murderer because it isn’t immediate danger. But it’s danger in the distance. You are making yourself sick on purpose, and without a care in the world. I would call that at least venially sinful.