I'm not sure about artificial sweeteners. I know that in small doses they're probably safe but determining health effects of everything we eat is hard (we eat a lot of different stuff).

I use "splenda (sucralose) [1] the yellow packet" sometimes and I find I don't need very much at all for my tea, as they are significantly sweeter than the real thing. Its basically modified sucrose. [1]https://en.wikipedia.org/wiki/Sucralose

There is ongoing research about how the body reacts to "sweet taste" vs "carbs" in terms of insulin response. I find the less sweets I eat the less I crave them over time. [2] [2]https://www.health.harvard.edu/diabetes/ask-the-doctor-do-ar...