Sinuplex® features a unique, ephedra-free blend of vitamin C, quercetin, nettle root extract, bromelain, and N-acetylcysteine--which have been shown to support healthy sinus, nasal, lung, and respiratory function. These natural ingredients are carefully selected and manufactured with advanced processing technologies to preserve the potency and stability of delicate components, such as bromelain that may also help support healthy eicosanoid synthesis.