Nicolas Noyola
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Dairy intake and semen quality among men attending a fertility clinic
Dairy intake and semen quality among men attending a fertility clinic
Low-fat dairy intake was positively related to sperm concentration and progressive motility. On average, men in the highest quartile of intake (1.22–3.54 servings/day) had 33% (95% confidence interval (CI) 1, 55) higher sperm concentration and 9.3 (95%CI 1.4, 17.2) percentage units higher sperm motility than men in the lowest quartile of intake (≤0.28 servings/day). These associations were primarily explained by intake of low-fat milk. The corresponding results for low-fat milk were 30% (95%CI 1,51) higher sperm concentration and 8.7 (95%CI 3.0, 14.4) percentage units higher sperm motility. Cheese intake was associated with lower sperm concentration among ever smokers. In this group, men in the highest tertile of intake (0.82–2.43 servings/day) had 53.2% (95%CI 9.7, 75.7) lower sperm concentration than men in the lowest tertile of cheese intake (<0.43 servings/day).
#2 StudyDairy food intake in relation to semen quality and reproductive hormone levels among physically active young men
Dairy intake and semen quality among men attending a fertility clinic
Low-fat dairy intake was positively related to sperm concentration and progressive motility. On average, men in the highest quartile of intake (1.22–3.54 servings/day) had 33% (95% confidence interval (CI) 1, 55) higher sperm concentration and 9.3 (95%CI 1.4, 17.2) percentage units higher sperm motility than men in the lowest quartile of intake (≤0.28 servings/day). These associations were primarily explained by intake of low-fat milk. The corresponding results for low-fat milk were 30% (95%CI 1,51) higher sperm concentration and 8.7 (95%CI 3.0, 14.4) percentage units higher sperm motility. Cheese intake was associated with lower sperm concentration among ever smokers. In this group, men in the highest tertile of intake (0.82–2.43 servings/day) had 53.2% (95%CI 9.7, 75.7) lower sperm concentration than men in the lowest tertile of cheese intake (<0.43 servings/day).
#2 Study
Dairy food intake in relation to semen quality and reproductive hormone levels among physically active young men
Total dairy food intake was inversely related to sperm morphology (P-trend = 0.004). This association was mostly driven by intake of full-fat dairy foods. The adjusted difference (95% confidence interval) in normal sperm morphology percent was −3.2% (−4.5 to −1.8) between men in the upper half and those in the lower half of full-fat dairy intake (P < 0.0001), while the equivalent contrast for low-fat dairy intake was less pronounced [−1.3% (−2.7 to −0.07; P= 0.06)]. Full-fat dairy intake was also associated with significantly lower percent progressively motile sperm (P= 0.05).
Both studies concluded that full-fat dairy intake harms fertility. Now I was operating under the assumption that skim-milk contains less estrogen than whole-milk, but the user Travis conducted an interesting and intelligent analysis of the hormonal contents of the various milk types: The Travis Corner
he also compared the ratios of androgens to estrogens and concluded that whole-milk actually has a much better ratio than skim-milk. So whole-milk should be more pro-androgenic and pro-fertility than skim, but this study apparently turns that idea on its head. The first-study doesn't really offer any condemnation of low-fat dairy, only full-fat, but in the second study it seems that intake of dairy of any kind reduces sperm count. The second study also handily measures hormonal levels and compares it with dairy intake quartiles (Study 2, Table IV). There was basically little correlation with dairy intake and any sort of hormone, except for FSH, where levels were 27% and 26% higher among the 4th quartile for full-fat and total dairy-intake respectively compared to the 1st quartile.
There was an association between higher intake of total dairy foods with higher FSH levels (P-trend = 0.05). This association was stronger among men with at least one semen analysis abnormality (n= 50; P-trend = 0.003) than among men with no semen analysis abnormality (n= 139; P-trend = 0.61, Fig. 2).
Anyways given that there are lots of doubts regarding milk and estrogen and whatnot, I decided I would post these studies here to stimulate some (hopefully) illuminating discussion. Thoughts?
Total dairy food intake was inversely related to sperm morphology (P-trend = 0.004). This association was mostly driven by intake of full-fat dairy foods. The adjusted difference (95% confidence interval) in normal sperm morphology percent was −3.2% (−4.5 to −1.8) between men in the upper half and those in the lower half of full-fat dairy intake (P < 0.0001), while the equivalent contrast for low-fat dairy intake was less pronounced [−1.3% (−2.7 to −0.07; P= 0.06)]. Full-fat dairy intake was also associated with significantly lower percent progressively motile sperm (P= 0.05).
Both studies concluded that full-fat dairy intake harms fertility. Now I was operating under the assumption that skim-milk contains less estrogen than whole-milk, but the user Travis conducted an interesting and intelligent analysis of the hormonal contents of the various milk types: The Travis Corner
he also compared the ratios of androgens to estrogens and concluded that whole-milk actually has a much better ratio than skim-milk. So whole-milk should be more pro-androgenic and pro-fertility than skim, but this study apparently turns that idea on its head. The first-study doesn't really offer any condemnation of low-fat dairy, only full-fat, but in the second study it seems that intake of dairy of any kind reduces sperm count. The second study also handily measures hormonal levels and compares it with dairy intake quartiles (Study 2, Table IV). There was basically little correlation with dairy intake and any sort of hormone, except for FSH, where levels were 27% and 26% higher among the 4th quartile for full-fat and total dairy-intake respectively compared to the 1st quartile.
There was an association between higher intake of total dairy foods with higher FSH levels (P-trend = 0.05). This association was stronger among men with at least one semen analysis abnormality (n= 50; P-trend = 0.003) than among men with no semen analysis abnormality (n= 139; P-trend = 0.61, Fig. 2).
Anyways given that there are lots of doubts regarding milk and estrogen and whatnot, I decided I would post these studies here to stimulate some (hopefully) illuminating discussion. Thoughts?