How does the section titled ‘Category 2: the known health risks of BCS3L-1’ problematically appeal to authority? It seems to about as much as appealing to known

How does the section titled ‘Category 2: the known health risks of BCS3L-1’ problematically appeal to authority? It seems to about as much as appealing to known results that swallowing vast quantities of lead is a bad idea would. (The other sections certainly appeal to authority, although not obviously fallaciously to me, but that would be to go over quite tired ground about medical regulation.)