| Most Common Name: |
Vitamin B17 | | Also
Known As (other names): | Laetrille |
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Vitamin B17 also called Laetrile: A substance composed of
Amygdalin, a cyanogenic glycoside found in apricot pits and bitter almond.
There are claims that Laetrile has cytotoxic properties and is effective
against cancer. Not only has this not been approved by the FDA but the use of
Laetrile for this purpose has been restricted.
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Amygdalin: Present in bitter almonds and
apricot pits, amygdalin is a dervative of phenylalanine. Laetrile, also known as
vitamin b17, a form of amygdalin, has been used against cancer but this has been
restricted as so far there is little evidence that it is successful and it has
yet to be approved by the FDA.
Amygdalin is a Cyanogenic Glycoside.
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Cyanogenic Glucosides: In Cyanogenic
Glucosides nitrogen occurs as prussic acid (hydrocyanic acid) - one of the most
toxic plant compounds. The occurrence of cyanogenic Glucosides is wide spread in
the plant kingdom and is present in many plants and foods in the seeds of many
stoned fruits (apricots, almonds and prunes to mention a few) as well as many
seeds of grasses and legumes.
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Glycosides: Most glycosides remain inactive
until they are hydrolysed in the gastric tract by specialised bacteria which
then releases an aglycone (phenols, terpenes, steroids and quinones) that has
the active effect. These compounds could be phenol, sulphur or alcohol based and
many of them like the Cyanogenic glycosides are extremely toxic.
Glycosides are widespread in plants and are extremely
varied in action, effect and medicinal application.
Glycosides are characterized by the chemical composition
of a combination of sugar and non-sugar compounds capable of forming esters with
an acid or ethers with alcohols.
When glycosides hydrolyse (with enzymes or acids) they
form glycones (sugar moiety) or aglycones (non-sugar moiety)
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Vitamin B17 constituent is present in: |
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Medicinally Significant
volume |
Minor volume
Vitamin B17 is present in small quantities which may
not be enough to be a significant dosage for medicinal purposes
or is not the major constituent of this plant/herb |
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* Statements made
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