Herbal slimming teas, also known as Chinese slimming teas, are teas containing senna, a plant-based laxative that can cause diarrhea, nausea and vomiting, according to Real News Magazine. People who take the tea often think that the caffeine levels in the tea will cause them to burn more body fat.
The potential side effects of herbal slimming teas include fainting, stomach cramps, dehydration, serious electrolyte disorders and even death, according to Real News Magazine. Because of this, herbal slimming teas are dangerous for those wanting to lose weight. Any health benefits gained from the tea itself, including antioxidants and polyphenols, are also contained in all sorts of regular teas that do not carry the same dangers.