> One microscopic bread crumb and I'll have brain fog for a week. It's widely known that a bread crumb will have harmful effects if you have celiac disease. A

> One microscopic bread crumb and I'll have brain fog for a week. It's widely known that a bread crumb will have harmful effects if you have celiac disease. A human who has a peanut allergy will have very negative effects from eating a fraction of a peanut. It's also widely known that foods that are fine for one species can have toxic effects in others. A well-known example is that chocolate is fine for humans (in moderation) but deadly to dogs in similar quantities. A finding that humans without an allergy or hypersensitivity to it react to wheat gluten with brain inflammation would be big news, as would a finding that a large fraction of the human population has a hypersensitivity.