Negative effects in humans seem to be primarily in allergic individuals.
While the most obvious and dangerous route for an allergic individual is unintentional ingestion, some reactions are possible through external exposure.
Treatment for accidental ingestion of milk products by allergic individuals varies depending on the sensitivity of the allergic person.
Coconut: a review of its uses as they relate to the allergic individual.
In severe cases, allergic individuals may go into anaphylactic shock and die unless treated promptly.
In individuals allergic to the venom (about 3% of cases), a sting sometimes causes anaphylactic shock.
A fish by any other name can still be dangerous for individuals allergic to fish and fish products.
In contrast allergic individuals commonly develop hay fever, asthma, hives, eczema, or intestinal symptoms from these types of exposures.
There may be no safe fragrance for some allergic individuals.
There are experimental techniques which appear to have desensitized some allergic individuals.