Leafy greens, such as chard, contain anti-nutrients like oxalates which can cause a burning sensation in the throat.

“chard is an interesting vegetable when I was when I was vegan I used to hate because it would give me some like scratchy feeling in the back of my throat I never like what is going on about yeah yeah yeah like charge-charge gives you this weird feeling in the back here throat like yeah what's that gonna do your gut it makes your throat right good it's not like this is not and that's the thing is they're all these toxic compounds and the plants are putting them there so that I think about this and I have this reaction and think I don't wanna eat that plan it gave me this weird feeling in my throat maybe I got a little nauseous”