StacyCorruptor
Iron
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The study above had the animals consume freely (no restrictions/dosing whatsoever) either Pepsi or Coke, and the groups were further separated into drinking diluted soda (1:1 with tap water) or undiluted soda (100% Pepsi/Coke). The experiment lasted for only 15 days and the findings are unequivocal. Namely, only the groups drinking undiluted sodas had an increase in total testosterone (T) levels, as well as testicle size/volume. In fact, by end of the 15-day experiment, T levels almost doubled in the groups drinking undiluted soda. In addition, only the groups drinking undiluted sodas had an increase in AR expression levels in the testicles, and the increase was in the 60%-78% range. The study tries to explain the findings away with the caffeine contents of the sodas, however both sodas have a relatively low concentration of caffeine (~100mg/L), which translated into animal (mice) doses of about 15mg/kg b.w. and the human-equivalent dose of that is ~1mg/kg daily. Daily human doses of 80mg-100mg caffeine have been studied many times in males and have never been shown to cause such a large increase in testicle size, T levels, or AR expression. Thus, the only plausible explanation for the study findings is the sugar content of the sodas, which is corroborated by the improved male fertility from eating a lot of sugar.
"...The testes weights of PEP-2, COC-1 and COC-2 were significantly increased on day 15 (P<0.05) as compared to PEP-1 and CG. The outcomes demonstrated a high dose of Pepsi-Cola or Coca-Cola could promote testis growth and development
As shown in FIGURE 1A , the concentrations of serum testosterone in all mice were enhanced after the Pepsi-Cola and Coca-Cola treatment. Serum testosterone concentration of PEP-2 was higher than that of other four groups. On days 10 and 15, there were significant differences between PEP-2 and CG. Serum testosterone concentration of COC-2 was also higher than that of CG (P<0.05). The outcomes indicated that high doses of Pepsi-Cola and Coca-Cola could improve testosterone secretion of male mice."
"...Expression levels of AR mRNAs in mouse testes were detected using qRT-PCR so as to assess the FRBI influences on s of AR mRNAs. As shown in Figure 2, expressions of AR mRNAs in four treatment groups were increased. On day 15, increments of COC-1, COC-2, PEP-1 and PEP-2 mice were 60.18%, 67.26%, 65.93% and 78.76% (P<0.05) on the bases of the CG level. Pepsi-Cola and Coca-Cola could enhance expressions of AR mRNAs in the testes of mice."
Men who drink Coca-Cola or Pepsi have larger testicles, study suggests
"...The country's most popular sodas might refresh the parts other drinks can't reach - by giving men bigger testicles and making them more masculine, a study suggests. Research on mice showed adult males who drank Coca-Cola or Pepsi had higher testosterone levels and larger genitals than their peers...'The outcomes demonstrated a high dose of Pepsi-Cola or Coca-Cola could promote testis growth and development,' the study said. Testosterone levels were also recorded, and concentrations were found to be enhanced at the end of the study. On days 10 and 15, the group which drank pure Pepsi had significantly higher concentrations of testosterone than the control group. After 15 days, the control group's testosterone concentration was around 23 nanomoles (nmol) per liter, whereas the groups which drank pure Coca-Cola and Pepsi had a concentration that was roughly 30 nmol/L. The mice who were allocated the pure Coca-Cola also had higher levels of the male hormone than the control group. The results suggest that large doses of Pepsi and Coca-Cola could improve testosterone production in male mice."
