For the temporary relief of coughs and congestion due to cold and flu. Helps loosen mucus (expectorant) and clear bronchial congestion. Soothes sore throat. Source Naturals was created in 1982 to support each individual's potential to enjoy optimal health. Source Naturals' comprehensive Bio-Aligned Formulas help bring the power of alignment to your body. When formulating, we evaluate the underlying causes of system imbalances, and then provide targeted nutrition to interdependent body systems. Our line of more than 600 products also includes well-researched, single entity nutrients in their highest quality and most bioavailable forms.