Immunity is the ability of your body to wade off disease-causing pathogens that have entered our body and destroy those pathogens which are already present in our body. Both processes are carried out by the body’s amazing immune system. Immunity in Ayurveda is a by-product of a properly functioning metabolism and digestion. Responsible for this is what we call Agni, roughly translated as “digestive fire” (read: digestive processes or metabolism). Agni is the key factor when it comes to creating a strong immunity, a well-balanced physiology, a clear mind and balanced emotional & psychological states. We can say that Agni is the foundation for excellent health. Whether Agni is working well or not can be recognized and measured through the presence of Ojas, which is the essence of Kapha dosha in our body. Ojas is mainly the result of effective tissue metabolism. This means, when bodily tissues are nourished properly due to a correctly functioning cell metabolism (for which a type of Agni is responsible), Ojas is produced. Signs of strong and abundant Ojas are a healthy, strong body with clear, radiant eyes, lustrous hair, glowing skin, and a strong immune system and a mind that is clear, balanced emotional states, a predominantly positive outlook on life and good resilience against stress.
Food that is sattvic by nature increases Ojas. Sattvic foods are young coconut, almonds, dates, ghee, avocados, mung beans and most fruits and most vegetables (ideally organically grown). When these foods are prepared correctly, consumed at the right time, digested and absorbed well due to a well-functioning Agni, our body tissues will produce Ojas as the final result. In this way, Ojas can be defined as the essence of digestion while proper digestion is the result of a well-functioning Agni and a strong Agni ultimately is the cause for good immunity. However, Agni can be easily disturbed and weakened, resulting in impaired digestion, absorption, tissue nutrition, elimination and ultimately reduced immunity. This process does usually develop slowly over time and is thus not initially visible. The main causative factors that disturb and impinge on the proper workings of Agni are: