black walnut

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Quoted message said:

Anyone know why black walnut supplements tend to give me nosebleeds?

Are you cracking them open on your forehead?

Omega 3 PUFAs tend to disintegrate tissues, apparently due to free
radical damage. If you read "Dieat and Health," by the National
Research Council, you can read about their misgivings about taking such
supplements. The talk of the Greenland Eskimoes, who did not live very
long on such diets. Then there is:

montygram
Aug 22, 4:31 pm show options
Newsgroups: sci.med.nutrition
From: "montygram" <[email hidden]> - Find messages by this author
Date: 22 Aug 2005 17:31:07 -0700
Local: Mon, Aug 22 2005 4:31 pm
Subject: Re: how much dha in sardines?
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You had better hope there isn't much, if you are eating them.

For example:

"...addition of cod liver oil to to the diet elevated the rate of
peroxidation by 20-fold."

And that was on top of the 10-fold increase over rats on the fat free
diet (when corn oil was added.

Source: from the text of the following (which is just the abstract):

Free Radic Biol Med. 1988;5(2):95-111.

A role for dietary lipids and antioxidants in the activation of
carcinogens.

Gower JD.

Division of Comparative Medicine, Clinical Research Centre, Harrow,
Middlesex, U.K.

The ways in which dietary polyunsaturated fats and antioxidants affect
the balance between activation and detoxification of environmental
precarcinogens is discussed, with particular reference to the
polycyclic aromatic hydrocarbon benzo(a)pyrene. The structure and
composition of membranes and their susceptibility to peroxidation is
dependent on the polyunsaturated fatty acid (PUFA) content of the cell
and its antioxidant status, both of which are determined to a large
degree by dietary intake of these compounds. An increase in the PUFA
content of membranes stimulates the oxidation of precarcinogens to
reactive intermediates by affecting the configuration and induction of
membrane-bound enzymes (e.g., the mixed-function oxidase system and
epoxide hydratase); providing increased availability of substrates
(hydroperoxides) for peroxidases that cooxidise carcinogens (e.g.,
prostaglandin synthetase and P-450 peroxidase); and increasing the
likelihood of direct activation reactions between peroxyl radicals and
precarcinogens. Antioxidants, on the other hand, protect against lipid
peroxidation, scavenge oxygen-derived free radicals and reactive
carcinogenic species. In addition some synthetic antioxidants exert
specific effects on enzymes, which results in increased detoxification
and reduced rates of activation. The balance between dietary
polyunsaturated fats, antioxidants and the initiation of carcinogenesis
is discussed in relation to animal models of chemical carcinogenesis
and the epidemiology of human cancer.

Moreover, Biochemist Ray Peat has cited much older studies, such as how
dogs fed
fish oil all died of cancer:

"Fifty years ago, it was found that a large amount of cod liver oil in
dogs' diet increased their death rate from cancer by 20 times, from the
usual 5% to 100%. A diet rich in fish oil causes intense production of
toxic lipid peroxides, and has been observed to reduce a man's sperm
count to zero. [H. Sinclair, Prog. Lipid Res. 25, 667, 1989.]"

Source: http://www.healthythyroid.com/vegetableoils.htm

Peat notes of the Sinclair experiment:

"An oil researcher spent 100 days eating what he considered to be the
Eskimo diet, seal blubber and mackerel paste. He observed that his
blood lipid peroxides (measured as malondialdehyde, MDA)
reached a level 50 times higher than normal, and although MDA
is teratogenic, he said he wasn't worried about fathering
deformed children, because his sperm count had gone to zero."
Original source: Sinclair, H., Prog. Lipid Res. 25: 667-72,
"History of EFA & their prostanoids: some personal
reminiscences."

Stop listening to the hype (mostly from people who want to sell you
supplements) and start doing your own thinking and research! You can
search this group for montygram and read through some of my posts, then
if you have questions, feel free to ask. You can start a post with
montygram, such as "Montygram: what did they really find in this
study?" In many studies, the researchers' interpretations are clearly
inconsistent with the evidence that they themselves generated. Here's
a good example, cited by those who claim that omega 3 and PUFAs in the
diet are "essential:" Pregnant cats were fed highly artificial diets,
and they only got hydrogenated coconut oil as a source of fat. Some
kittens were born healthy, but most had problems or died. Basic logic
tells us that if something is essential, then none of the kittens would
be healthy. I propsed an experiment that would be on point and
"natural:" feed the pregnant cats all the mice they want, but the mice
would be raised on fresh coconut oil. I have had problems with mice
eating my shredded coconut, so there's no doubt that mice will eat it
naturally. The mice will be "esssential fatty acid deficient," so the
cats can't get the "essential fatty acids" from the mice, and the only
thing else we would give them is basic vitamin/mineral supplements to
elminate that as a factor (which was not done in the first "essential
fatty acid" experiment, because not all the vitamins were even known at
that time (1930). Nobody has expressed any interest in taking me up on
this offer, mainly because the terms are that if it is demonstrated
that "essential fatty acids" are not, they must pay for the expenses
incurred in the experiment, whereas I will pay if all the kittens die
under these conditions.

The fact that they don't understand basic logic should, by itself, make
you very concerned about such claims.

Walnuts contain high amounts of polyunsaturated fats (~10g per 1oz
serving). Included in this 10g are Omega-3 Fatty acids, slow blood
clotting (this is why they're good in protecting against heart disease
- fewer clots = fewer blocked arteries). You're probably getting
nosebleeds because your blood isnt' clotting as quickly as before
eating the walnuts (how many are you eating a day, anyway?), which
would have prevented or decreased the number off bleeds.

What is the benefit you hope to gain from taking Black Walnut
supplements? How many grams/oz do you eat per day (or is it in some
other form?)