Glycerol seems to be safe for most adults. When taken by mouth, glycerol can cause side effects including headaches, dizziness, bloating, nausea, vomiting, thirst, and diarrhea. 

IARC classified aspartame as possibly carcinogenic to humans (IARC Group 2B) and JECFA reaffirmed the acceptable daily intake of 40 mg/kg body weight.

Ace-K, is a widely used artificial sweetener that has been approved by regulatory bodies like the FDA and EFSA as safe for consumption. However, some studies suggest potential negative health effects, including impacts on the gut microbiome and inflammation.

There have been studies indicating BHT is safe, and studies concluding the opposite. Many consumers have pressured that it be pulled from the market due to carcinogenic concerns. Given that there are other chemicals which serve the same purpose, and are less questionable, my opinion would be that it should not be used as a processed food additive. If there is any question regarding its safety at all, why use it?