Claim: Does MSG in Chinese food actually cause headaches?

MSG in Chinese food does not cause headaches. Most scientific studies indicate no significant link between MSG consumption in food and headaches, with some suggesting that headaches may occur only with high doses of MSG without food. Support for this comes from health organizations and research studies. However, some alternative sources claim that MSG can trigger headaches in sensitive individuals, linking it to conditions like Chinese Restaurant Syndrome, though these claims lack strong scientific backing. The models diverge sharply — treat this as higher-uncertainty. Gemini comes in highest (90%), while Perplexity is lowest (50%). OpenAI expresses higher confidence than Perplexity on this claim. While the majority of studies suggest that MSG does not cause headaches, some sources argue that it can trigger headaches in sensitive individuals. These opposing claims often cite anecdotal evidence or specific conditions like Chinese Restaurant Syndrome. However, the lack of consistent scientific evidence supporting these claims means they do not significantly alter the overall conclusion that MSG in food is unlikely to cause headaches for the general population. Thus, the uncertainty remains low, but it is acknowledged that individual sensitivities may exist.