Is chocolate really a reflux trigger?

Chocolate is one of the more consistently cited reflux triggers, and the reason is specific: it contains both caffeine and theobromine, a related compound, both of which relax the LES. It's also often high in fat, which slows stomach emptying and adds a second mechanism on top of the first. Dark chocolate generally has more caffeine and theobromine than milk chocolate, so it can be a stronger trigger for some people, even though it's often considered the "healthier" option. As with most trigger foods, the effect is dose-dependent — a small piece after a light meal may cause no symptoms, while a large amount after a heavy dinner is more likely to. Testing your own tolerance in small amounts is more useful here than an all-or-nothing rule.