It’s also known as “pestilence wort,” “bog rhubarb,” and “devil's hat.”
A 2002 study published in the journal International Immunopharmacology suggests this flowering plant is effective at relieving rhinitis, AKA hay fever.
A 2001 study found peppermint oil effective at relieving allergic rhinitis in rats.
Meanwhile, frankincense and eucalyptus oils both contain compounds known to have anti-inflammatory effects.
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This suggests they may help with reactions linked to seasonal allergies, like swelling and blocked passages.
In a review of studies, hay-fever sufferers who irrigated cleared their mucus more effectively and took less medication compared than those who didn’t use nasal irrigation.
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A 2015 systematic review of 23 studies suggests probiotics, particularly Lactobacillus, can decrease nasal symptoms.
Lactobacillus is found in fermented foods, yogurt, and supplements.
Two grams of the green powder were actually more effective than Zyrtec in a 2020 controlled trial.