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From: Dr Gosia O'Reilly (
Subject:         let me clarify (edit, ignore the other version)
Date: April 18, 2015 at 11:21 pm PST

In Reply to: Re: Eat raw, keep your brain, grow your heart posted by temp on April 14, 2015 at 9:36 am:

For some reason, the parts of my post got cut out. So
here is another attempt to get it right.

Just wanted to clarify something, as you seem to have
misunderstood what I was saying. Finally found a
moment to do so!

"About the last part of long term raw vegans claiming
to not supplement and having normal B12 levels."

This is not what I was suggesting. I was saying that
there are some long-term un-supplementing raw vegans,
who say they do not experience the B12 deficiency
symptoms. Their levels may be low or not, but they do
not experience any symptoms of ill health.

I take a position that I am not going to assume that
all of those people are lying. In particular since I
have read scientific studies that suggest that not
all long-term un-supplementing vegans do experience
B12 deficiency symptoms.

So, the science-based reason of my position is that
low levels of B12 do not imply that a person has to
have health issues. I included these quotes in my
post above, but you seem to have missed those?:

"B12 levels below 200 pmo/L are not a guarantee of
ill health.
The levels at which one is B12 deficient may vary for
each individual."

Here is another quote:
"In 1999, a study of 36 long-term vegans reported
that ďMost of the vegans had vitamin B12 values less
than 200 pg/mlĒ and ďNone of the vegans had any
hematologic evidence of vitamin B12 deficiency,
however four of them had neurologic complaintsĒ [46].
That is, out of the 36 tested individuals, 4 had
detectable symptoms but 32 did not."

When I got diagnosed with low B12 levels (it was my
decision to assume that I was in fact deficient as I
experienced certain symptoms too), I decided to spend
some time researching the scientific literature, in
order to find some straight answers. Instead, I found
that the current knowledge on B12 is far from
complete. There are no categorical answers in the
literature that would suggest that veganism
necessarily "causes" B12 deficiency (as per actual
symptoms of ill health).

So, based on my reading of the literature and the
various stories that people are reporting, I take a
position that the situation is slightly more complex
than it is often being suggested. That is, there may
exist certain individual differences, environmental,
biological, genetic, which cause that different
people experiences may be unique. I detailed these in
my article (


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