It is very frustrating and it is way beyond just beef. There are mammal-sourced ingredients in so many products that you have to read the labels for everything and often check with the manufacturer to determine if ingredients such as glycerin, gelatin, magnesium stearate, etc are mammal-sourced or plant-sourced. Only organic sugar and some lot numbers from Domino Sugar are "safe". Others are filtered through bone char. Bottled water can be filtered through bone char. Many processed foods use whey (dairy) even when they claim dairy-free. It goes on and on. I thought this was bad enough but for many of us, this morphs into Histamine Intolerance which is another level altogether. You are probably aware but there are some good AGS support groups on FB and Alpha-Gal Info. org is an excellent reseource.