This gentle vitamin and herb enriched anti-histamine helps you over come allergies by building up your natural defense system. The Stinging Nettles dry up nasal passages, Bromeline relieves inflammation, while the vitamin C, Quercetin and N-Acety-L-Cysteine aid the immune system during seasonal allergies.

The “Natural” in Natural D-Hist.
Ortho Molecular Products’ Natural D-Hist is formulated for maximum effectiveness, with carefully selected dosages of critical natural components to provide optimal support for nasal and sinus passageways.

Quercetin
A powerful natural flavonoid, quercetin has been shown to inhibit mast cell degranulation and its
unfortunate consequences.

Stinging Nettles Leaf
Stinging Nettles components have been shown to block important enzymes within the arachidonic acid cascade as well as having proven their effectiveness in a single ingredient clinical trial.

Bromelain
A strong pineapple enzyme, bromelain has proven mucolytic properties. As such, bromelain supports normal mucosal tissue function and enhances the absorption of quercetin.

N-Acetyl L-Cysteine (NAC)
An amino acid that is also a natural mucolytic, NAC reduces the viscosity of mucus. Clinical studies have proven oral doses of NAC to be an excellent means to recharge cellular glutathione, a foundational antioxidant.