However, milk's ability to boost IGF-I is not the only mechanism by which this occurs. Milk fat, like the other fats may also increase the body's production of testosterone,which is linked to prostate cancer risk. You can re-call testosterone info in Case study on estrogen and cancer growth post.
In addition, researchers also found that milk appears to interfere with the activation of vitamin D in the body.
Vitamin D (a hormone) is vey important in our bodies because it helps your body absorb calcium from the digestive tract and It also protects the prostate against cancer.
Vitamin D normally produced by sunlight's action on the skin, and it can also come from the diet. But, these forms of the vitamin are actually inactive precursors.
Therefore, In order to function as full-fledged vitamin D, they must pass to the liver and then to the kidneys in order to slight changes to their molecular structure.
What happen if most of us eat a lot of daily products that contains high calcium?
As the load of calcium in dairy products floods into the bloodstream and it will signals the body that, there is plenty of calcium in the body system, therefore the
body does not need to activate vitamin D which will use to absorb calcium anymore.
The body will reduces its vitamin D activation so that it does not absorb too
much calcium. Note: Calcium overdoses can be toxic to body.
The fact is that high-calcium foods can cause a substantial drop in the amount of activated vitamin D in the blood.
We do understand that vitamin D is essential for maintaining a healthy prostate, if less vitamin D in the blood may mean that the risk of prostate cancer will increase.
Daily milk also contains some added vitamin D but those Vitamin D is in inactive precursor form, and dairy consumption actually suppresses vitamin D activation in the body.
Therefore, base on the study as above, have linked milk drinking to prostate cancer.
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