True
Food technologists who have worked on these 3 in1s tell me they wouldn't drink the stuff.

It's actually not that hard to figure out. Apart from the 3in1 having high sugar content what makes it even worse is the non-dairy creamer. It's the nasty chemical stuffs that renders non-dairy creamer unhealthy. While there's no specific evidence saying 3in1 is bad but there are tons of studies regarding the side effects of non-dairy creamer.

And it's not just 3in1 alone, even you can find non-dairy creamer in so freaking many commercial products. It could be your well-loved boba tea (except the fresh milk series), the condensed milk used in many beverages and desserts and that includes your favorite teh tarik and ice cream unless it is dairy-based ice cream imported from NZ (that's why they cost more), the creamer in Maggi curry, "milky" juice such as banana, papaya and honeydew milk, just to name a few here.