sugar into our food and drinks
Chocolate, candy, cake, desserts and sweets in general.
And I do prefer to base my conclusions on scientific studies
You should look some more up. It causes cancer over time. Will you get cancer from using a mobile phone for a year? Unlikely. Will you get cancer for being exposed to wifi waves, microwaves, mobile phones, computer chips, etc? Yes, although after several decades as their effects slowl build up.
less inhumane than for example some of the industrial slaughterhouses.
The experimentation itself isn't any less inhumane.
Why? We eat animals. We eat plants. We cultivate and change them based on what we humans as a civilization need.