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Zeuzzz
15th December 2008, 09:30 PM
DISCLAIMER: The person writing this post (me) has basically no knowledge at all in this area, I have merely gathered information from various sources online and assembled them into a semi coherent prose, and will stand corrected on anything in this post by people more knowledgable.

Its about the controversial natural and unpatenable treatment for cancer, usually called laetrile, but often incorrectly called "vitamin b17". Its a substance found in apple pips and apricot kernels and various other fruits, which has gradually been forced out of modern mans diet due its bitter taste.


Laetrile is not poisonous in normal amounts. Anyone who eats large amounts of it or gives people large doses of it is highly irresponsible, as in high doses it can be very toxic, but that’s the same for any drug or treatment. The molecule is made up of four components, two glucose, one cyanide, and one banzaldehyde. Yes, Cyanide is poisonous in gaseous form, they used it to gas people years ago, but this is only when in the pure form. When its locked up in the structure of the molecule, its not cyanide anymore, its a would be called a cyano[.....]. For example vitamin B12 contains cyanide, its called cyanocobalamin. Its not in its gaseous form, its locked up with banzaldehyde and glucose, and called amygdaline. Proponents think it works on treating cancer for a number of very good reasons, mainly by depositing the cyanide on the cancer cells, killing them, but not effecting the rest of the body.


As everyone knows, cyanide can be highly toxic in its pure form, and even fatal if taken in sufficient quantity. However, locked as it is in this natural state, it is chemically inert. There is only one substance that can unlock the Laetrile molecule and release the cyanide, an enzyme called beta-glucosidase, and when Laetrile comes in contact with the enzyme in the presence of water, not only is the cyanide released but also the benzaldehyde. Fortunately, the unlocking enzyme is not found to any dangerous degree anywhere in the body except at the cancer cell, where it always is present in great quantity, sometimes at levels in excess of one-hundred times that of the surrounding normal cells. The result is that Laetrile is unlocked at the cancer cell, releases its poisons to the cancer cell, and only to the cancer cell. Theres another important enzyme called rhodanese, which has the ability to neutralize cyanide by converting it instantly into by-products that actually are beneficial and essential to health. This enzyme is found in great quantities in every part of the body except the cancer cell which, consequently, is not protected.


The trouble is that no controlled or double-blind clinical trials have been reported (who would fund them? You cant patent it, so there no incentive to do so) leaving only very old and questionable tests. The few reported cases of cyanide poisoning are very dubious, and probably involved irresponsible amounts of the substance. Supporters of Amygdaline have since eaten many apple pips in one go, to show that there are minimal adverse effects. Peoples best bet is to eat as much as you would with your normal fruit intake, just don’t throw away the seeds.

The drug was tested in the 70’s by some major cancer research institutes. And this is where the story gets messy, depending on which side you listen to.

Wiki says:

http://en.wikipedia.org/wiki/Amygdalin#Cancer_treatment

In 1972, Memorial Sloan-Kettering Cancer Center board member Benno Schmidt convinced the hospital to test laetrile so that he could assure others of its ineffectiveness "with some conviction".[19] However, the respected scientist put in charge of the testing, Kanematsu Sugiura, found that laetrile inhibited the secondary tumors in mice without destroying the primary tumors. He repeated the experiment three times with the same results, and then three more times. [....]

His first three experiments were not published because, in the words of Chester Stock, Sugiura's supervisor, "it would have caused all kind of havoc". Nevertheless the results were leaked in 1973, causing a stir. Subsequently laetrile was tested on 14 tumor systems, and a Sloan-Kettering press release concluded that "laetrile showed no beneficial effects".[19] Three other researchers were unable to confirm Sugiura's results, although one of three did confirm Sugiara's results in one of his three studies. Mistakes in the Sloan-Kettering press release were highlighted by a group of laetrile proponents led by Ralph Moss, former public affairs official of Sloan-Kettering hospital, who was fired when he announced his membership in the group. These mistakes were considered inconsequential, but Nicholas Wade in Science noted that "even the appearance of a departure from strict objectivity is unfortunate."[19] The results from these studies were published all together.



After this Sugiura was pulled off the project, as it was presumed he had made a mistake, and they got two other scientists to perform the test, Elizabeth Stockett and her colleague, and they came up with essentially the same results as sigiura, in fact they were probably even more favourable than Sugiura was, and so they were pulled off the project too, and then finally the tests were given to a Dr Schmidt, who also verified this, but was told to keep quiet. And later all three were leaked due to angry people at the research centre, and due to this the final test was commissioned, which finally showed what they wanted; that there was no overall benefit to laetrile.

So what were these mistakes that Moss got fired for that were thought to be inconsequential by the big pharma? Him and others that dug into the research pointed out a weird anomaly. The mice in the final test receiving the saline injection proved to have their tumours stop growing 40% of the time. Which is impossible, if that’s the case then salt water is the cure we’ve all been looking for! Moss claimed they did this because the Laetrile mice were getting a recovery rate of 40%, and they wanted to show that there was no difference between the two groups. But he was fired, and the case for laetrile considered closed.

Some independant studies have been done since, and all have looked very promising, but they find it nearly impossible to get funding, as you don’t get a return from a non patentable drug. For example, one out many of these was conducted by Dr Mahendra Deonarain in 2000, and he came to the exact same conclusion that was postulated in the 70’s about the cyanide in laetrile being a very effective treatment for cancer. The BBC ran a good article on it:


Cyanide targets cancer. Scientists are using cyanide to attack tumours. (http://news.bbc.co.uk/1/hi/in_depth/sci_tech/2000/festival_of_science/913463.stm)


Scientists are using cyanide to attack tumours.

They have tested a two-stage drug that harnesses the power of the dangerous chemical to kill bowel cancer cells in the lab.The researchers, at Imperial College, London, now hope to refine the technology and test it on patients. The technique takes a lead from some plants that release cyanide to protect themselves from insect attack.

Tumour specific

The cassava plant, almond tree and hydrangea, all have an enzyme that will produce cyanide when it comes into contact with a particular sugar molecule. The enzyme and the sugar are normally kept apart and are only brought together when a pest bites into the plant tissue. The Imperial College scientists have engineered the enzyme and attached it to an antibody that will target specific tumours, when injected into the body. A second drug, containing the sugar, would then be introduced which would react with the enzyme to release cyanide and kill the cancer cells.

No resistance

Dr Mahendra Deonarain said the system would be so specific that only the target tumour would be exposed to the cyanide. "The enzyme will circulate around the body and accumulate in the tumour only, and then it will clear from everywhere else. Then the second step is to inject the sugar drug and that itself will circulate around the body but only where the tumour is, where the enzyme is, will you get the cyanide. "It will be enough to kill the cancer cells and you will be able to repeat it over and over again until the tumour has gone." Dr Deonarain said the cancer cells would not be able to develop resistance to the cyanide in the way they can with some of current cancer therapies.



The best way to prove or disprove the laetrile theory of cancer, would be to take several thousands of people, over a period of many years, expose them to a consistent diet of Laetrile rich nitriloside foods and then check the results. Fortunately this has already occurred by the study of the following cultures; The Hunza, aboriginal Eskimos, Hopi and Navajo Indians, Abkhazians.


http://www.laetrile.com.au/copy.asp?sect=q2&page=people

HUNZA

In the remote recesses of the Himalayan Mountains, between West Pakistan, India and China there is a tiny Kingdom called Hunza. These people are known world over for their amazing longevity and health. They live well beyond 100 years and have commonly been known to still father children at the age of 110. One of the first medical teams to study the Hunza was headed by world-renown British surgeon Dr Robert McCarrison. Writing in the AMA Journal Jan 7, 1922 he reported:

"The Hunza has no known incidence of cancer. They have an abundant crop of apricots. These they dry in the sun and use largely in their food".

It is interesting to note that the traditional Hunza Diet contains over 200 times more nitriloside (B17 Rich food) than the average American or Australian Diet. There is no such thing as money in Hunza. A mans wealth is measured by the number of apricot trees he owns. And the most prized of all foods was considered to be the apricot seed. It is very common for the Hunza to eat between 30 - 50 (ie. about 30mg of B17) apricot seeds as an after lunch snack. The thousands of seeds they do not eat they store or grind them very finely and then squeezed under pressure to produce a very rich oil used in cooking and to apply to the skin. The apricot is staple food in Hunza. They use the apricot, its seed and the oil for practically everything. In addition to the ever present apricot, the hunzahuts eat mainly grain and fresh vegetables. These include buckwheat, millet, alfalfa, peas, broad beans, turnips, lettuce, sprouting pulse and berries of various sorts. All of these with the exception of lettuce and turnips contain vitamin B17.

It is important to know when the Hunza leave their secluded land and adopt the menus of other countries, they soon succumb to the same diseases and infirmities including cancer as the rest of man kind.

ESKIMOS

The Eskimos are another people that have been observed by medical teams for many decades and found to be totally free of cancer. The traditional Eskimo diet is amazingly rich in B17 nitrilosides that come from the residue of of the meat of caribou and other grazing animals, and also from the salmon berry. Another Eskimo delicacy is green salad made out of the stomach contents of caribou and reindeer which are full of fresh tundra grass. Tundra grasses such as Arrow are have shown to be contain the highest content of B17 than other grasses.

Alaska's most famous doctor Dr Preston A Price claims that, "In his 36 years of contact with these people he had never seen a single case of malignant disease among the truly primitive Eskimos, although it frequently occurred when they were modernized.

An interesting point to note is that when an Eskimo leaves his traditional way of life and begins to rely on a western/modern diet he becomes even more cancer prone than the average American.

HOPI & NAVAJO INDIANS

The Indians of North America are another people who are remarkably free from cancer. The AMA went as far as conducting a special study in an effort to discover why there was little to no cancer amongst the Hopi and Navajo Indians. The February 5, 1949 issue of the journal of the American Medical Association declared that they found 36 cases cases of malignant cancer from a population of 30,000. In the same population of white persons there would have been about 1800. Dr Krebs research later found that the typical diet for the Navajo and Hopi Indian consisted of nitriloside-rich foods such as Cassava. He calculated that some of the tribes would ingest the equivalent of 8000mg of Laetrile per day from their diet !!!

ABKHAZIANS

The Abkhazians are found deep in the Caucasus Mountains on the Northwest side of the Black Sea. They are a people with almost the exact same health record and longevity as the Hunzakuts.Their food and lifestyle having to live in a harsh rugged terrain are almost identical. They follow a diet which is low in carbohydrates, high in vegetable proteins and rich in minerals and vitamins, especially vitamin Laetrile [....]


Any opinions? To a layman like me that looks that quite a strong case.

casebro
15th December 2008, 10:58 PM
Looks like the two-stage drug has as much in common with Laetrile as it does with blue dye.

blutoski
16th December 2008, 12:23 AM
Any opinions? To a layman like me that looks that quite a strong case.

For one thing, the last source I would rely on to learn about a product is the sales brochure. This goes for conventional medicine, too.

Try QuackWatch: [Laetrile (http://www.quackwatch.org/01QuackeryRelatedTopics/Cancer/laetrile.html)]

Relevant passage: In July 1980, the NCI undertook clinical trials of 178 cancer patients who received Laetrile, vitamins and enzymes at the Mayo Clinic and three other prominent cancer centers. The study included patients for whom no other treatment had been effective or for whom no proven treatment was known. All patients had tumor masses that could easily be measured, but most of the patients were in good physical condition. Since Laetrile proponents were unable to agree on the formula or testing protocol for Laetrile, NCI decided to use a preparation that corresponded to the substance distributed by the major Mexican supplier, American Biologics. The preparation was supplied by the NCI Pharmaceutical Resources Branch and verified by a variety of tests. The dosage of Laetrile was based on the published recommendations of Krebs, Jr., and the Bradford Foundation.

The results of the trial were clear-cut. Not one patient was cured or even stabilized. The median survival rate was 4.8 months from the start of therapy, and in those still alive after seven months, tumor size had increased. This was the expected result for patients receiving no treatment at all. In addition, several patients experienced symptoms of cyanide toxicity or had blood levels of cyanide approaching the lethal range. An accompanying editorial concluded:

Laetrile has had its day in court. The evidence, beyond reasonable doubt, is that it doesn't benefit patients with advanced cancer, and there is no reason to believe that it would be any more effective in the earlier stages of the disease . . . The time has come to close the books.

Bradford and American Biologics responded to the study with three different lawsuits against the National Cancer Institute, alleging that as a result of the study, they had sustained serious financial damage from a drastic drop in demand for Laetrile. All three suits were thrown out of court.


Regarding the anthropological 'data': they all sound more like sketchy anecdotes at best, and hardly evidence of anything, and are absolutely not 'studies'.

No: the first step would be animal testing, and lo! It has been done. Negative results. This is the first of two reasons that large-n human trials are not attractive; the other is that the small-n human trials have also been negative, and so has blinded case study comparison.

Zeuzzz
16th December 2008, 12:41 AM
Yeah, that study was one of the negatives, but there are also some positives to counter it. Are there any more recent trials anyone knows of? In mice especially, i would have thought it would be a greatly researched area.

What I'm especially interested in is if this statement stands up to scutiny:

"There is only one substance that can unlock the Laetrile molecule and release the cyanide, an enzyme called beta-glucosidase, and when Laetrile comes in contact with the enzyme in the presence of water, not only is the cyanide released but also the benzaldehyde. Fortunately, the unlocking enzyme is not found to any dangerous degree anywhere in the body except at the cancer cell, where it always is present in great quantity, sometimes at levels in excess of one-hundred times that of the surrounding normal cells. The result is that Laetrile is unlocked at the cancer cell, releases its poisons to the cancer cell, and only to the cancer cell. Theres another important enzyme called rhodanese, which has the ability to neutralize cyanide by converting it instantly into by-products that actually are beneficial and essential to health. This enzyme is found in great quantities in every part of the body except the cancer cell which, consequently, is not protected."

blutoski
16th December 2008, 01:13 AM
Yeah, that study was one of the negatives, but there are also some positives to counter it.

That's obviously debatable, and I cited several trials, not one. It's important to be aware that studies are not equal, and are not evaluated by counting them. Were the trials that obtained positive results double-blinded? Randomized? What was the N? How were subjects solicited? I'd love to review them.





Are there any more recent trials anyone knows of? In mice especially, i would have thought it would be a greatly researched area.

The California Medical Association's Cancer Commission conducted three animal tests. All negative. Why would you expect it to be 'greatly researched' at this point?




What I'm especially interested in is if this statement stands up to scutiny:

"There is only one substance that can unlock the Laetrile molecule and release the cyanide, an enzyme called beta-glucosidase, and when Laetrile comes in contact with the enzyme in the presence of water, not only is the cyanide released but also the benzaldehyde. Fortunately, the unlocking enzyme is not found to any dangerous degree anywhere in the body except at the cancer cell, where it always is present in great quantity, sometimes at levels in excess of one-hundred times that of the surrounding normal cells. The result is that Laetrile is unlocked at the cancer cell, releases its poisons to the cancer cell, and only to the cancer cell. Theres another important enzyme called rhodanese, which has the ability to neutralize cyanide by converting it instantly into by-products that actually are beneficial and essential to health. This enzyme is found in great quantities in every part of the body except the cancer cell which, consequently, is not protected."

Beh. Theory. Remember: every cure that failed to pan out looked good on paper.

Concerns:

beta-glucosidase is no more abundant in tumour tissue than the rest of the body (Dorr RT, Paxinos J: The current status of laetrile. Ann Intern Med 89 (3): 389-97, 1978., Curt GA: Unsound methods of cancer treatment. Princ Pract Oncol Updates 4 (12): 1-10, 1990, Curt GA: Unsound methods of cancer treatment. Princ Pract Oncol Updates 4 (12): 1-10, 1990, Greenberg DM: The case against laetrile: the fraudulent cancer remedy. Cancer 45 (4): 799-807, 1980, Herbert V: Laetrile: the cult of cyanide. Promoting poison for profit. Am J Clin Nutr 32 (5): 1121-58, 1979., Scott PJ: Laetrile and cancer quackery problems. Cancer Forum 5 (2): 93-97, 1981)
in particular, beta-glucosidase has not been detected in tumour tissue (Newmark J, Brady RO, Grimley PM, et al.: Amygdalin (Laetrile) and prunasin beta-glucosidases: distribution in germ-free rat and in human tumor tissue. Proc Natl Acad Sci U S A 78 (10): 6513-6, 1981., Biaglow JE, Durand RE: The enhanced radiation response of an in vitro tumour model by cyanide released from hydrolysed amygdalin. Int J Radiat Biol Relat Stud Phys Chem Med 33 (4): 397-401, 1978)
rhodanese is equally abundant in tumour tissue and healthy tissue - there is no detectable imbalance (Gal EM, Fung FH, Greenberg DM: Studies on the biological action of malononitriles, II: distribution of rhodanese (transulfurase) in the tissues of normal and tumor-bearing animals and the effect of malononitriles thereon. Cancer Res 12: 574-79, 1952. , Conchie J, Findlay J, Levvy GA: Mammalian glycosidases: distribution in the body. Biochem J 71: 318-25, 1959.)
what: no beta-glucuronidase claims?

G O R T
16th December 2008, 02:09 AM
What about this: ncbi.nlm.nih.gov/pubmed/6986971 (sorry, <15 posts)


The case against laetrile: the fraudulent cancer remedy.

Greenberg DM.
The evidence for the claims that laetrile (amygdalin) can prevent or control cancers has been reviewed. The beta-glucosidase content of cancer tissues is low compared to that of normal liver and small intestine. Cancer tissues contain the enzyme rhodanese in amounts comparable to that of liver and kidney and hence, cannot be attacked selectively by cyanide release through beta-glucosidase action on amygdalin. Amygdalin does not have the properties of a vitamin. Rats have been reared for several generations on diets devoid of cyanogenic glycosides, without developing neoplasms. Experiments with tumor-bearing rodents have demonstrated no curative properties by amygdalin administration. Amygdalin is not as non-toxic as claimed, particularly when ingested orally, and especially when taken with plant material high in beta-glucosidase. The claims for cure and control of cancers in humans have been refuted by distinguished physicians who specialize in the treatment of cancer patients. The writings of laetrile proponents are filled with erroneous and absurd statements. The propaganda for the doctrine of "freedom of choice in cancer treatment" deludes many individuals with treatable cancer to reject proven methods of treatment.

PMID: 6986971 [PubMed - indexed for MEDLINE]

Zeuzzz
16th December 2008, 10:48 AM
Beh. Theory. Remember: every cure that failed to pan out looked good on paper.

Concerns:

beta-glucosidase is no more abundant in tumour tissue than the rest of the body (Dorr RT, Paxinos J: The current status of laetrile. Ann Intern Med 89 (3): 389-97, 1978., Curt GA: Unsound methods of cancer treatment. Princ Pract Oncol Updates 4 (12): 1-10, 1990, Curt GA: Unsound methods of cancer treatment. Princ Pract Oncol Updates 4 (12): 1-10, 1990, Greenberg DM: The case against laetrile: the fraudulent cancer remedy. Cancer 45 (4): 799-807, 1980, Herbert V: Laetrile: the cult of cyanide. Promoting poison for profit. Am J Clin Nutr 32 (5): 1121-58, 1979., Scott PJ: Laetrile and cancer quackery problems. Cancer Forum 5 (2): 93-97, 1981)
in particular, beta-glucosidase has not been detected in tumour tissue (Newmark J, Brady RO, Grimley PM, et al.: Amygdalin (Laetrile) and prunasin beta-glucosidases: distribution in germ-free rat and in human tumor tissue. Proc Natl Acad Sci U S A 78 (10): 6513-6, 1981., Biaglow JE, Durand RE: The enhanced radiation response of an in vitro tumour model by cyanide released from hydrolysed amygdalin. Int J Radiat Biol Relat Stud Phys Chem Med 33 (4): 397-401, 1978)
rhodanese is equally abundant in tumour tissue and healthy tissue - there is no detectable imbalance (Gal EM, Fung FH, Greenberg DM: Studies on the biological action of malononitriles, II: distribution of rhodanese (transulfurase) in the tissues of normal and tumor-bearing animals and the effect of malononitriles thereon. Cancer Res 12: 574-79, 1952. , Conchie J, Findlay J, Levvy GA: Mammalian glycosidases: distribution in the body. Biochem J 71: 318-25, 1959.)
what: no beta-glucuronidase claims?



Thats more like what I was looking for. Thanks :) Though they are still all very old publications. It would be nice to see a more recent trial with a broader scope to put a line under laetriles efficacy once and for all.

Thought it seemed to good to be true. But if I ever get cancer, I'm gonna be eaiting my apple pips whenever I have an apple. Just incase.

JJM
16th December 2008, 02:11 PM
Zeuzz There is only one substance that can unlock the Laetrile molecule and release the cyanide, an enzyme called beta-glucosidase, and when Laetrile comes in contact with the enzyme in the presence of water, not only is the cyanide released but also the benzaldehyde.No, laetrile can decompose, spontaneously, under physiological conditions, releasing cyanide. (Read about it at Quackwatch, a link is posted above.) That is why treatment with laetrile is worse than no treatment, and eating apple seeds is not recommended.

Hydrogen Cyanide
16th December 2008, 05:45 PM
I don't have time to give you all the stuff I've gathered over the years (it keeps getting moved), but laetrile has been studied and found to mostly cause cyanide poisoning.

Check out cancer.gov and do a search for laetrile, there is a list of several studies done in the 1970s during its heyday (why do more recent research when the thirty year old studies found out it was a dumb idea?). Then go to www.pubmed.gov (http://www.pubmed.gov) and look up laetrile... where you will find several case reports of folks trying it out who ended up with cyanide poisoning (mostly in a journal of emergency medicine, one case report includes a woman who bought a bunch of apricot pits, ate them and ended up in the ER with cyanide poisoning).

Old Bob
17th December 2008, 03:00 PM
Big parma is our enemy, they bend results to suit the money tree. I know apricot kernels work, have seen it work on prostrate cancer. Buy your kernels from canning factories, say you intend to propagate as the traitors (gov in Australia) have barred them from the health shops.

Zeuzzz
17th December 2008, 07:04 PM
Zeuzz No, laetrile can decompose, spontaneously, under physiological conditions, releasing cyanide. (Read about it at Quackwatch, a link is posted above.) That is why treatment with laetrile is worse than no treatment, and eating apple seeds is not recommended.


I know loads of people that eat whole apples, pips and all, and they have not died. Well, not really that many, but a couple. You ever tasted the centre of an apple? :eye-poppi

If apple pips were really that lethal, shouldn't apples be sold with a health warning?

Hydrogen Cyanide
17th December 2008, 08:01 PM
From another thread:
It was fun, and since you challenged me, here goes (and as I said, they are case reports):

Severe cyanide toxicity from 'vitamin supplements' (http://www.ncbi.nlm.nih.gov/pubmed/16175068?ordinalpos=5&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsP anel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum).

Acute cyanide poisoning from laetrile ingestion. (http://www.ncbi.nlm.nih.gov/pubmed/6881636?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsP anel.Pubmed_DiscoveryPanel.Pubmed_Discovery_RA&linkpos=5&log$=relatedarticles&logdbfrom=pubmed)

Acute cyanide toxicity caused by apricot kernel ingestion (http://www.ncbi.nlm.nih.gov/pubmed/9832674?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsP anel.Pubmed_DiscoveryPanel.Pubmed_Discovery_RA&linkpos=2&log$=relatedarticles&logdbfrom=pubmed).

And this is not quite the article I remember reading on Cancer.gov, it looks like it has been revamped to make is simpler to understand:
http://www.cancer.gov/cancertopics/pdq/cam/laetrile/patient/27.cdr#Section_27 (http://www.cancer.gov/cancertopics/pdq/cam/laetrile/patient/27.cdr#Section_27)

...

The dose makes the poison. Eating a few apple pips is not going to hurt you, but taking in enough laetrile to "cure cancer" can cause some serious issues.

Also, look up the difference between something working "in vitro" versus "in vivo." Sure bleach kills lots of bacteria in a petri dish, but do you want to drink it?

Pantaz
17th December 2008, 08:12 PM
Found this article by Robert H. Shmerling, M.D.:

http://www.intelihealth.com/IH/ihtIH/WSIHW000/35320/35323/362929.html?d=dmtHMSContent

"Swallowed seeds may cause trouble not only by their mechanical effects on the intestinal tract but also by toxic (or poisonous) effects on the body. This may happen either because of the seed’s natural components or due to a contaminant (such as pesticide or bacteria). Fortunately, this type of illness is also rare. For example, I could find no reports in the medical literature linking ingestion of apple seeds with serious illness."
. . .
"A 1998 report in the Annals of Emergency Medicine described cyanide poisoning in a woman who bought apricot kernels at a health food store, became severely ill within 20 minutes of ingestion and was close to death when she reached the emergency room. Fortunately, the cause of her illness was identified and she recovered, but it was the first report of its kind in nearly 20 years."
. . .
"It is true that swallowing the seeds and pits of commonly consumed fruits and vegetables may occasionally cause illness. However, such events are so rare that there is little reason to recommend a change in behavior based on this risk. Common sense should prevail: Don’t go out of your way to eat what seems to be inedible, such as the pits or large, hard seeds of fruits or vegetables. If you accidentally swallow an apple seed, do not panic. In the grand scheme of things, you are still better off eating an apple — even with the occasional seed — than eating junk food."

Hydrogen Cyanide
17th December 2008, 08:35 PM
From the history of the stuff, http://www.cancertreatmentwatch.org/alt/laetrile1.shtml ... From the beginning, Laetrile has been tested and found wanting. It is, in fact, one of the most tested cancer "cures" ever. In addition to the investigations of the California Department of Public Health and Canadian authorities the National Cancer Institute tested Laetrile in animals on five separate occasions between 1957 and 1975. None produced evidence that Laetrile is effective against cancer. Four independent cancer research centers undertook additional studies in 1975 and found no evidence that Laetrile could cure cancer or inhibit malignant growths. In an effort to put the matter to rest—scientifically—one of the four labs, the Memorial Sloan Kettering Cancer Center of New York City, is conducting a "double blind" test in which not even the investigators will know which of the animals being tested arc given Laetrile and which arc receiving "placebos."

And in other old news... bloodletting is also not effective for fevers, radioactive waters do not promote good health, and eye exercisers do not improve vision. See:
http://www.museumofquackery.com/welcome.htm

Edit to add, read this book:
http://www.amazon.com/Quack-Medical-Museum-Questionable-Devices/dp/1891661108/

Edit again to add... also read this book:
http://www.amazon.com/Fads-Fallacies-Name-Science-Popular/dp/0486203948/