Bromelain - Bromelain is an enzyme that helps reduce the swelling of mucous membranes from allergies and during times of respiratory stress
Stinging Nettle - Our proprietary formula includes stinging nettle, which provides well-known support against seasonal airborne substances
Bitter Orange - Bitter orange contains synephrine, which helps the body support open airways
Natural Sinus Relief - HistaBlock provides nutrients that support healthy respiratory function as the body battles irritants, pollutants and toxins