I don’t have tiktok now, but years ago I downloaded it (i think before it was called musically), I used it for a day or two, and I remember after an hour or so of using it I get nauseous like how you might get on a boat, not severe enough to puke but still not comfy that you need to go for a walk or something to feel better. I deleted it and never used it again. And I don’t use any mainstream social media either since all bow have these shorts, if it’s not text based like rss or hn, it will be YouTube on videos at least 20min duration.