Tulsi Leaves are also often recommended to start your day by having two to three fresh Tulsi leaves on an empty stomach. It is a great blood purifier and is known to flush out toxins and clean your internal systems. Along with this comes the advice to not chew Tulsi leaves but instead swallow them. Tulsi, also known as the Indian basil or the holy basil, is often referred to in India as the Queen of Herbs. Tulsi, also known as the Indian basil or the holy basil, is often referred to in India as the Queen of Herbs.