Please choose the correct ending to complete the given sentence: Health: [header] How to use apple vinegar for weight loss [title] Learn about the nutrition information and chemical composition of apple cider vinegar in order to determine precisely how this supplement can work to promote healthy weight loss. [substeps] Apple cider vinegar is an acidic liquid that is created by the fermentation of whole apples. The science behind apple cider vinegar as an effective weight loss supplement is questioned in many academic circles.

Ending1: The acidity in this liquid affects the body's metabolism and produces stress in the stomach and liver, which can lead to weight gain. [title] Recognize the benefits of apple cider vinegar. Ending2: There are, however, an equal number of nutritionists and dietitians who believe that apple cider vinegar can curb an appetite and promote gradual fat reduction. [title] Understand what to look for when purchasing apple cider vinegar. Ending3: Apple cider vinegar is expected to be highly acidic so it must be harvested for its benefits. If you are a vegan or have liver problems and need to eat it, it must be consumed as water instead. Ending4: Still there are rumors that it can go back further in one's life than any else. [title] Ensure that the apple cider vinegar is biodegradable.

Answer format: ending1/ending2/ending3/ending4