Short answer: Because it contains ACV and fiber, some people notice mild digestive changes — bloating, gas or looser stools — when first starting, especially if hydration is low.
Why this specific side effect is named directly
Rather than a vague "may cause digestive upset" disclaimer, naming bloating, gas and looser stools specifically gives you concrete symptoms to watch for and understand.
What genuinely helps reduce this initial discomfort
Starting with a smaller serving, drinking plenty of water and taking it with meals usually helps — three specific, practical mitigation strategies directly tied to the identified cause.
💡 Worth knowing: ACV and fiber can cause mild bloating or gas for some, especially at first — listed directly among the site's own honest cons.