Quercetin is a bioflavonoid that helps inhibit the over-production of histamine and helps with inflammation.

Bromelain helps increase the absorption of Quercetin, and is a powerful anti-inflammatory enzyme which is very effective in treating inflammation of the delicate sinus tissues.

L-Histidine is an essential amino acid that supports normal histamine production.

NAC (N-acetylcysteine) is an amino-like substance that helps clear mucous and protects tissue.

Stinging Nettle is a traditional herb shown to significantly reduce mucous and help reduce nasal congestion.

MSM- helps to soften the cell's walls, allowing allergens, foreign proteins, and free-radicals to be moved out of the body.

Zinc is necessary for the proper functioning of the immmune system and helps to protect the body against infections.

Vitamin A is crucial to the immune system and is known for its ability to maintain eye health.

Vitamin C plays an important role in fighting infections. It is the main antioxidant in the cells of the respiratory passages, and may have anti-inflammatory and antihistamine effects.

Vitamin B-12 is a necessary nutrient for the utilization of histidine within the body. It helps balance the body's production of histamine.