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About fathers' B12 intake before conception: "high B12 intake was associated with an increased risk of CBT" (childhood brain tumors - in the offspring).

http://www.ncbi.nlm.nih.gov/pubmed/25625505...

"Treatment with folic acid plus vitamin B(12) was associated with increased cancer outcomes and all-cause mortality in patients with ischemic heart disease in Norway, where there is no folic acid...

"Elevated concentrations of vitamin B(12) may be associated with an increased risk for advanced stage prostate cancer, but this association requires examination in other large prospective studies."
...

Paternal intake of B12 before conception: Higher levels of paternal dietary vitamin B12 appeared to be associated with an increased risk of childhood ALL" (acute lymphoblastic leukemia).
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http://www.ncbi.nlm.nih.gov/pubmed/6673052?dopt=Abstract

"high serum vitamin B12 level, with or without unsaturated TC I elevation, usually implies a poor prognosis in a patient with cancer."
http://www.ncbi.nlm.nih.gov/pubmed/902243?dopt=Abstract ...

"Vitamin B12 and (in cohort studies) folate were associated with increased prostate cancer risk"
...

"Very high cobalamin blood levels are significantly associated to malignant hemopathies among the population of a department of internal medicine. "

http://europepmc.org/abstract/med/17981373

...

http://www.ncbi.nlm.nih.gov/pubmed/23029349?dopt=Abstract
[PMID:23029349]

Here's yet another study suggesting a link between cancer and high B12 levels. There's an ongoing discussion about cause and effect here, some people suggest that the high B12 levels in (some of?)...

Here's another one: http://ebm.sagepub.com/content/71/2/226.abstract, referred to here

" supplementary vitamin B12 caused increased growth of theRous sarcoma in chicks....

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2071282/
The above study from 1963 shows that a discussion about associations between high B12 intake and health problems (in this case, cancer) has been...

PMID: 24249744, Dec 2013
http://www.ncbi.nlm.nih.gov/pubmed/24249744
Elevated plasma vitamin B12 levels as a marker for cancer: a population-based cohort study

Here's yet another study focusing on the possible link with a high intake of B12 and folic acid supplements and cancer:

Control of prostate cancer associated with withdrawal of a supplement...

This study also serves as a good reference re. whether to get folic acid from food or from supplements. It's easy to get enough folic acid from food on a vegan diet, but not so easy on a standard...

Here's another site mentioning 'troubling' B12/cancer connections: Is a Vitamin B12 Overdose Safe?:


I have only seen the abstract of that report, and find a bit vague, because it doesn't say...

Animal foods, protein, calcium and prostate cancer risk: the European Prospective Investigation into Cancer and Nutrition


British Journal of Cancer (2008) 98, 1574–1581....

Here's a similar report from American Association for Cancer Research (Feb 2010)
Circulating Folate, Vitamin B12, Homocysteine, Vitamin B12 Transport Proteins, and Risk of Prostate Cancer: a...

I've already mentioned this study from 2001 in another thread:
Animal-Based Nutrients Linked With Higher Risk Of Stomach And Esophageal Cancers


Here's another study which was released a week...

Nov 14, 2010: Does Milk Cause or Promote Prostate Cancer?

ETA 2011 - more here:
http://www.pcrm.org/health/prevmed/milk_prostate.html
http://chetday.com/prostatecancermilk.htm

It's too bad that The Vegan Society's site, which now has an article dedicated to prostate cancer, doesn't even mention these findings. They still seem to belong to the group of vegans and non-vegans...

Red and Processed Meat Increases Risk of Prostate Cancer
This was published on PCRM's site today.

As already mentioned in various threads (see list below), there is a link between some cancer types and animal product intake. The main difference between a vegan and meat based diet (in terms of...

Here's a study from 2008 on a group of men with prostate cancer who changed their lifestyle and started to live on a predominantly plant based, low-fat diet..


"The 30 men who enrolled did not...

Some more links about prostate cancer and animal products:

From dfwnetmall.com
Dairy and Prostate Cancer

From cancerproject.org:
Prostate Cancer: Prevention and Survival


From...

Here's some relevant comments from Dr. McDougall's site:



Animal Fat May Accelerate Prostate Cancer

Saturated fat intake predicts biochemical failure after prostatectomy by Sara Strom in the...

I've already mentioned this study in our B12 overdose thread, but since this isnt really about B12 overdosing, but about the link between high B12 levels and prostata risk, I thought this study...