Harvard Medical School conducted a “spermicide” experiment on three different formulations of commercially available cola drinks. They put frozen sperm into test tubes and poured them into different cola drinks. After repeated tests, it was concluded that cola does have a spermicidal effect. The origin of Coke spermicidal topic about this issue on the Internet circulated a statement, the statement originated from the 1960s sexual liberation of the American men and women popular car shock, after the woman will use a bottle of Coke inserted into the vaginal opening to flush semen to achieve contraception, and later somehow spread into drinking Coke spermicidal. Does Coke really kill sperm? The answer is yes, but there is a prerequisite! The premise that Coke kills sperm is that Coke and sperm are in direct contact. Harvard Medical School conducted a “spermicide” experiment on three different formulations of cola beverages available on the market. They put frozen sperm into test tubes and poured different cola drinks into them. After repeated tests, it was concluded that cola does have a spermicidal effect. In 1985, Harvard Medical School Obstetrics and Gynecology of the United States, Dr. Sharee A. Umpierre and colleagues in vitro mixing of sperm and cola, detection of the number of surviving sperm, and came to the conclusion that cola has a certain spermicidal effect; in 1987, Taipei Veteran’s General Hospital of the Hong Chuan Yue et al. is the existence of the test of cola, sperm still have transmembrane migratory activity, and came to the cola does not affect the sperm activity of conclusion. In 1987, Hong Chuan-yue and others from Taipei Veterans General Hospital examined whether sperm still had transmembrane migration activity in the presence of cola and concluded that cola did not affect sperm activity. These two studies with opposite conclusions jointly won the 2008 Nobel Prize in Chemistry. Regardless of the results of this in vitro laboratory study, it is unscientific to douche the vagina with cola afterward for contraceptive purposes. The reason is that sperms numbering around 100,000 may have already reached the uterus before the douche. Does drinking Coke kill sperm? Coke may kill sperm when it comes into direct contact with them. The cola is drunk into the stomach, and did not directly contact with the sperm, after digestion and decomposition in the stomach and intestines, it is unlikely to have a spermicidal effect.Between 2001-2006, Danish doctor Jensen (Tina Kold Jensen) on the sperm quality and caffeine intake of 2,554 young men carried out a survey. It was found that daily coffee consumption (less than 800mg of caffeine) and cola consumption (two 500ml bottles per day) did not affect sperm count, vitality or morphology at all. Do you really drink at least two bottles of cola and at least seven cups of coffee every day? If not, then there is no need to worry too much about the rumors of whether coffee and cola kill sperm. In other words, drinking “huge quantities” of cola is only one aspect of a bad diet. Therefore, there is no evidence to prove that drinking large quantities of cola causes a decrease in sperm quality. It should be noted in particular that even though the total sperm count of those who consumed cola in large quantities dropped by 30%, it was still within the normal sperm count range given by the World Health Organization.