Tulsi: also known as holy basil, is indigenous to the Indian continent and highly revered for its medicinal uses within Ayurvedic medicine. Many in vitro, animal and human studies attest to tulsi having multiple therapeutic actions including adaptogenic, antimicrobial, anti-inflammatory, cardioprotective, and immunomodulatory effects. Holy basil has diverse actions on the respiratory system. It effectively liquefies the phlegm and is effective for cough due to allergic bronchitis, asthma and eosinophilic lung disease. In a study without controls, oral administration of an aqueous extract of dried holy basil to 20 patients with asthma increased lung vital capacity and relieved labored breathing.
Studies show that holy basil can inhibit the growth of a range of bacteria, yeasts and molds.
One small study also found that it can boost function of the immune system by increasing certain immune cells in the blood.
Holy basil is also linked to reduced blood sugar levels before and after meals, as well as treating anxiety and anxiety-related depression.