There are some things that with just the tiniest bit, my throat burns and swells. I'd say about 5 of my food allergies that I know of are like that.
Glutathione? I'll look into that. Did the runny nose start begin right when you started taking it or was there a period of time in between? You are sure it's not an allergy?
Yes, makes sense. Leaky gut would explain why allergies can develop after only eating something once or twice and why I've gotten allergies to things I've eaten with an offending food.