Wellness Influencers Say Smoking Mullein Leaf Is a Lung Cleanse. Doctors Say There's a Much Healthier Alternative. Frontier Co op Mullein Leaf, Cut & Sifted, Organic 1 lb. Frontier Co op I was looking for a natural way to ease my cough and cut down on vaping, and this mullein diffuser pen has been a game changer. The light, floral sweetness is incredibly smooth and satisfying, making Organic Mullein Leaf Liquid Extract 1 fl oz. (24 Servings) diffuser pen natural leaf herbal diffuser pen 600 uses Shop Trends Temu