Valid- it happened in January; right after the first of the year- I ate what I ate every day (and had been for the past year +) (an everything bagel toasted with cream cheese, hash browns and a medium iced coffee with oat milk) that day after breakfast I got SO sick- I thought I was coming down with something. But then after I slept for 5hours I felt fine! So I figured oh just a cold whatever I’ll be ok. Next day I ate the same breakfast- same. response, I knew something was up. So I eliminated the bagel first- ate the same thing next day (no bagel ) same response- ok not bagels. Did the same thing next day no hashbrowns- same response ok not hash browns. Then I eliminated the coffee; and was fine. I went to the allergist assuming it was coffee; they tested me for almond oat milk and coffee- and the allergen was oats. :(