Bitter or metallic taste in pine nuts
Occasionally, eating pine nuts can cause some people to experience a bitter or metallic taste that can last from a few days up to two weeks. This is referred to as "pine mouth". This taste disturbance might be unpleasant, but it does not pose any health concerns.
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How pine mouth occurs
Not everyone who consumes pine nuts will experience pine mouth. The pine nuts do not taste any different while consuming them, but after 1 to 3 days, the bitter or metallic taste is apparent and worsened by consuming other food and drinks.
Causes of pine mouth
The cause of pine mouth has not been determined, but several researchers have found that a particular species and source of pine nut, Pinus armandii, may be responsible for causing the symptoms.
Although some people may experience pine mouth, there is no health risk and the symptoms disappear after a few days (up to two weeks).
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