PollenLibrary.com describes blue oak pollen as severely allergenic. The plant's pollen is highly allergenic. Many dyes have been shown to be allergenic and in some cases carcinogenic. Among North American plants, weeds are the most prolific producers of allergenic pollen. Its wind-blown pollen is highly allergenic. Vacuolar and alkaline serine proteases have been implicated as the major allergenic proteins. These paints can be allergenic or toxic. Health concerns around mould include infections, allergenic or immunological illness, and nonallergic illness. These latex-rich environments may sensitize healthcare workers who regularly inhale allergenic proteins. Highly hydrolysed whey may be less allergenic than other forms of whey. Allergenic extracts, hormones and vaccines can also cause serum sickness. They can be allergenic and toxic in grazing livestock. Are the transferred proteins resistant to digestion - a trait shared by many allergenic proteins? The heat of cooking structurally degrades protein molecules, potentially making them less allergenic. The hydrolyzation process breaks intact proteins into fragments, in theory reducing allergenic potential.