Green tea extracts may help moderately overweight adults take off a few pounds, probably because of the polyphenols they contain. Unfortunately, green tea does not help keep those pounds off after they have been lost. And taking too much green tea in extract form can cause other health problems. Taking apple cider vinegar, although long a popular member of the dieter's armamentarium, has not been shown to be an effective weight loss measure.
Green Tea
Green tea is derived from the Camelia sinensis plant, as are black and oolong teas, according to the University of Maryland Medical Center. Green tea is made from unfermented leaves, and oolong tea is made from partially fermented and black tea from fermented leaves. Because the leaves in green tea are unfermented, they contain a higher concentration of antioxidants called polyphenols than do the other teas.
Fat-Burning Properties
Some clinical studies suggest the green tea extract may boost metabolism and help burn fat, reports the University of Maryland Medical Center. Researchers speculate that the polyphenols may be responsible for green tea's possible fat-burning effect. Taking green tea extract may help moderately overweight people lose weight but does not help them maintain the weight loss, according to MedlinePlus.
Green Tea Cautions
Green tea is safe for most adults when consumed in moderate amounts, says the National Center for Complementary and Alternative Medicine. However, some people taking the concentrated extracts have developed liver problems. Green tea contains caffeine, to which some people are sensitive. It also contains small amounts of vitamin K, which can make anticoagulant drugs such as warfarin less effective. You should consult with your health care provider before taking the extract.
Apple Cider Vinegar
Apple cider vinegar, on the other hand, is unlikely to help you lose weight, according to MayoClinic.com. And although it is safe for most people to consume in moderation, it can cause health problems. Because it is highly acidic, it can irritate your throat if consumed in large amounts. It may also interact with diuretics and with insulin and may contribute to low potassium levels.
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