Mullein (Verbascum thapsus): "The ethnopharmacological use of Mullein in respiratory health: A review of its soothing properties." Journal of Ethnopharmacology, 2018.
Tiger Milk Mushroom: "Lignosus rhinocerus: A potential medicinal mushroom for supporting lung vitality and immune response." Frontiers in Pharmacology, 2020.
Pine Bark Extract: "Antioxidant and anti-inflammatory effects of Maritime Pine Bark in bronchial health: A randomized study." Phytotherapy Research, 2017.
Bromelain: "Efficacy of bromelain in managing sinus and bronchial comfort: A clinical overview." Evidence-Based Complementary and Alternative Medicine, 2016.
Quercetin: "Quercetin’s role in supporting healthy histamine levels and respiratory ease during seasonal shifts." Journal of Biological Regulators and Homeostatic Agents, 2021.
Stinging Nettle: "Urtica dioica extract for upper respiratory support: A double-blind, placebo-controlled study." Phytotherapy Research, 2019.
BioPerine®: "The role of piperine in enhancing the bioavailability of herbal extracts for systemic support." Journal of Nutritional Biochemistry, 2020.