Natural D-Hist is a targeted blend of flavonoids, antioxidants, proteolytic enzymes and botanicals designed to provide comprehensive support for seasonal challenges caused by common environmental allergens. The formula includes quercetin, bromelain, stinging nettles leaf, and N-acetyl cysteine. The powerful combination actively promotes healthy nasal and sinus passages for individuals with elevated histamine and respiratory irritation.
Loading Dose: 2 capsules three times per day for 7-10 days or as recommended by your health care professional.

Maintenance: 1 or more capsules per day or as recommended by your health care professional.


Serving Size: 2 Capsules

Amount Per Serving
Vitamin C ... 300mg
(as Ascorbic Acid USP)
Quercetin Dihydrate ... 400mg
Stinging Nettle ... 400mg
(Leaves)
Bromelain ... 100mg
(2,400 GDU/g)(from Pineapple)
N-Acetyl-L-Cysteine USP ... 50mg

Other Ingredients: Natural Vegetable Capsules, Magnesium Stearate, Silicon Dioxide, and Stearic Acid.