A man who for five years took daily doses of apricot kernel extract – touted as a natural cancer shield – ended up with cyanide poisoning, according to a medical journal.
The problem was discovered when abnormally low oxygen levels were measured in the man’s blood while he was under anaesthesia for an operation, doctors wrote in BMJ Case Reports. Blood tests showed alarmingly high levels of cyanide.
When he woke up, the man told doctors he had been taking a daily dose of two teaspoons of homemade apricot kernel extract for five years. He also took three daily tablets of an herbal fruit kernel supplement.
The man’s case showed that “self-prescription with complementary medicines can result in potentially harmful toxicities”, and the problem may be more common than thought, researchers concluded. Doctors explained the cyanide concerns to the man, they said, “but he nevertheless opted to continue” his self-treatment