Guide

Yes, some foods can tint stool red or irritate the anus, but true blood in stool needs medical evaluation, especially if heavy or persistent.

Yes, some foods and supplements can cause black stool, but tarry, foul-smelling stool can signal bleeding and needs prompt medical care.

Yes, certain foods and eating habits can cause bloating by creating gas, drawing water into the gut, or slowing stomach emptying.

Yes, food can contribute to behavior problems in some people, mainly through additives, caffeine, and blood-sugar swings tied to eating patterns.

Yes, certain foods and late eating can nudge sleep toward vivid or unpleasant dreams by fragmenting REM sleep or raising body temperature.

Yes, contaminated or mishandled food can cause bacterial infection by delivering pathogens like Salmonella, Campylobacter, or E. coli to the gut.

Yes, certain foods can trigger asthma symptoms via allergy, sulfites, reflux, or histamine; food doesn’t cause asthma itself.

Yes, some foods and drinks can trigger atrial fibrillation, mainly alcohol binges, stimulants, large meals, high salt, and reflux-linked irritation.

Yes, certain foods can trigger an asthma attack in some people through allergies, sulfites, or reflux, while many others see no direct food–asthma link.

No, research does not show that food causes autism; genetics and early brain development account for most risk.