Precautions to take when eating Mahonia berries shouldn’t be overlooked. Indeed, what makes the plant excellent for health can also make it dangerous for a certain category of persons, too.
Main active compound – berberine
Vulnerable persons – pregnant & nursing women, children
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Mahonia, commonly called oregon grape, demonstrates medicinal benefits, but these can also have negative side-effects for some persons.
Also, mahonia berries contain a natural chemical compound called berberine. It is an alkaloid that is common in plants from the same family as barberry.
More seriously, though, consuming excess amounts of berberine has been linked to damage to brain development in fetuses and newborns.
Since berberine ingested by the mother can travel to her child through both placenta and breastmilk, it’s best to avoid it.
Mahonia berries aren’t particularly toxic or allergenic. However, like many other fruits, eating too many of them at once may cause digestive troubles.
In some tests, Oregon grape berries grown not far from roads had absorbed tiny amounts of heavy metals.
For example, lead particles usually contained in automobile brake pads and fumes had floated to the berries. A small deposit was identified on the fruits. The amount was minute, just barely enough to trigger the threshold that sanitary agencies consider “not sellable”.
Heavy metals are often accused of creating mental problems, especially when given to children and yet-to-be-born fetuses.