Analyzing the Comparison Groups
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Rigorous clinical trials use comparison groups to isolate the specific effects of a single dietary ingredient. In the 2018 study, both participant groups followed a restricted-calorie diet, with one group also consuming apple cider vinegar. Although the vinegar group lost more weight over 12 weeks, the small size and short duration of the study make it difficult to draw definitive conclusions about vinegar's independent efficacy.
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