3.孕婦、產婦忌喝茶。喝茶可能會導致妊娠中毒症,並且加重心、腎的負荷量,所以並不適宜喝茶。綠茶含有兒茶素、咖啡因等成份,可能會影響胎兒發育甚至增加流產的 危險,Neural Tube DefectsGreen tea contains catechins, caffeine and tannic acidsAll 3 substances have been linked to pregnancy risNevertheless, moderate consumption is considered safe.If you are pregnant, and especially in the first trimester, take a break特別是懷孕初期Beware of this serious side effects of green tea.,應Stop your tea intake completely.停止喝茶的習慣。另外茶有收斂作用,可能引起乳汁分泌減少,故產婦不宜飲太濃的茶。
5.患有心臟病,高血壓,糖尿病,心理障礙,甲狀腺功能亢進症和肝臟疾病、貧血等其他疾病:茶能使心跳加快,引起血壓升高,若是心臟、腎臟功能低下,或是高血壓患者,都不適合飲用濃茶。Caffeine may cause problems to those suffering from heart problems, high blood pressure, diabetes, psychological disorder, hyperthyroidism and liver disease.
Iron deficienThere are two kinds of dietary iron: heme and non-heme.有兩種膳食鐵:第一類: 血紅素鐵,存在於肉、魚和家禽,易於人體所吸收。第二類:Non-heme iron, found in flours, cereals, and fortified grain products, is more difficult to absorb.非血紅素鐵,發現在麵粉,穀物和加工糧食產品,難以吸收。 2001年3月版美國臨床營養學雜誌發表的一份研究報告,報導綠茶提取物將會減少吸收25 %A study published in the March 2001 edition of the American Journal of Clinical Nutrition reports that green tea extract reduces absorption of non-heme iron by 25%.非血紅素的鐵。
茶葉中含有的咖啡因、茶鹼、可哥鹼等成分,具有強心、利尿、刺激胃酸分泌及興奮高級神經中樞等作用,所以吃鎮靜、催眠藥物的前後都不宜喝茶,更不能用茶葉茶水送服這些藥物。為避免茶與Medication Interaction藥物產生相互作用,Green tea, like any other beverage, can interfere and interact with certain medications.As a safety precaution, avoid drinking tea for at least 2 hours after taking medications服藥前後至少要間隔2個小時,再飲用茶品為當。