Caffeine is a drug that excites the central nervous system. According to the determination, a bottle of 340 grams of cola-type drinks contain caffeine 50~80 mg, if a drink content of more than 1 gram of caffeine drinks, will lead to central nervous system excitation.
Its expression is restless, breath accelerates, muscle tremors, tachycardia, extrasystole and insomnia, dazzle, tinnitus to wait. Even if the dosage is less than 1 gram, due to the stimulation of caffeine to the gastric mucosa, nausea, vomiting, dizziness, palpitations and precordial pain and other toxic symptoms will occur.
Foreign experts believe that caffeine, as a substance that can affect women's physiological changes, can change the proportion of estrogen and progesterone in women to a certain extent, thus indirectly inhibiting the implantation and development of fertilized eggs in the uterus.
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