Reacción a "[Retracted] Small clinical trial concludes that consuming apple cider vinegar helps control obesity"

There are several repeated measures over time, but they don't use the proper statistical methodology for repeated measures in a longitudinal design of this type.
They only use apparently t-tests [a statistical tool for making comparisons] and they should have used other models that allow for the valuation of fixed and random components, but they also don't describe the total diet of the participants and how their caloric intake changes, the consumption of fruits, vegetables, ultra-processed foods, and so on.
In short, caution, a lot of caution.