I've had serious allergies for over 20 years and it had gotten worse over time especially when near an ocean (had to stop diving since it was near impossible to equalize with all the excess mucus).
But I recently became vegan and in about 2 weeks time, the allergies went away. I also have a friend who has asthma and when she went vegan, it all but disappeared. There's a lot of documentation about this but doctors don't give this advice probably because nutrition and prevention aren't a big part of their training.
But for anyone suffering, give it a try for a couple of weeks.
The quality of life gained is awesome.
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