The digestive system is a system that processes organic matter into nutrients and waste. How good this system is depends on energy levels, state of mind and body as well as longevity. In general, digestion becomes less effective as we age.
It is an integral part of the body and when not functioning correctly has knock-on effects that can disrupt just about every system, especially immunity as 80% of the immune system is located in the gut-associated lymphoid tissue (GALT). Poor digestion also affects the brain, nervous system, hormonal balance and the ability to detoxify through the liver and skin.