12 of the Best Ways to Relieve Seasonal Allergies Naturally

Pine bark extract (also called Pycnogenol) is derived from European pine trees. It consists of multiple active compounds that stimulate blood flow and improve the immune system.

Pine bark extract is regarded as a flavonoid that can block histamines. Some allergy sufferers supplement with pycnogenol before allergy season (up to 8 weeks before) to help decrease allergic symptoms.