A new study highlights how the United States might struggle to replace vital goods in an escalating trade war. When it comes to protectionist trade policies, the United States and other Western countries had better look hard before they leap. An unpublished study found that the United States is heavily dependent on China for the supplies of three essential vitamins: folic acid, or B 9 ; niacinamide, or B 3 ; and biotin, or B 7 . While there are potential solutions that could reduce this