One Ayurvedic eating rule that can keep you healthy for lifeYoga expert Kartik Mayur explained one such ancient Ayurvedic practice in a video post. Experts say that if you follow this rule daily while eating, you’ll never fall ill in the future. Experts say that if you follow this rule daily while eating, you'll never fall ill in the future. In such a situation, if your right nostril is active, eat food and drink water or any other beverage when your left nostril is active. How to activate your right or left nostrilIf you're sitting down to eat, you should activate your right nostril (Pingala Nadi).