Men who drink cola have larger testicles: Study | Toronto Sun
Two glasses of cola with ice with young man in background. Getty Images
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This is a different kind of Pepsi challenge.
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Men who drink Coca-Cola or Pepsi have larger testicles and higher testosterone levels than their peers who do not drink the carbonated beverages, based on a study in rodents.
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The findings, published in the journal Acta Endocrinol, appear to contradict previous studies that found sugary drinks and processed foods make men less fertile.
Researchers from China’s Northwest Minzu University set out to show that sugary sodas are not bad for male fertility and found that high caffeine intake can bolster testosterone production in the body, which leads to greater sperm production and larger testes.
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The first group of 30 male mice were kept in a cage with a water bottle filled with a half Pepsi, half tap water.
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The second group of 30 caged male mice were given 100% Pepsi.
Two more groups of 30 male mice were given the same water bottles except with Coca-Cola, while a fifth group, the control group, had only water.
All five groups of mice could drink as much as their little mouths desired for 15 days.
The testicles of all the mice were measured at the beginning of the study, at the conclusion, and four times in between.
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On the final day, the researchers found the mass of the mice’s testicles was significantly higher in the groups that drank 100% Coca-Cola and Pepsi compared to the watered down and control groups.
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“The outcomes demonstrated a high dose of Pepsi-Cola or Coca-Cola could promote testis growth and development,” the study said.
The control group’s testosterone concentration was 23 nanomoles per litre, while the groups that drank pure cola had a concentration of about 30 nanomoles per litre.
The mice in the pure cola groups also had higher levels of the male hormone than the control group, according to the study.
It is unclear what the long-term effects of the soft drinks on the increase in testicle size and testosterone levels.
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