Holy basil is a plant. It is a sacred plant in India. Holy basil also known as “Tulsi”. It has many health benefits. It is helpful in treating certain diseases like influenza, common cold, swine flu, diabetes, asthma, earache, headache etc. It is also helpful in mercury poisoning. It lowers stress and anxiety. It improves cognitive function. It maintains sugar level in the body and thus prevents diabetes. It helps protect the liver from toxin-induced damage. Tulsi is an excellent anti-oxidant. Tulsi reduced signs of pain, indicating effectiveness as an analgesic.