Vitamin B-12 is synthesised and utilised by bacteria in the human gut microbiome. However, not substantial research is done to establish the same statement.
The role of vitamin B 12 is very crucial as without enough red blood cells, your tissues and organs don't get enough oxygen. As a result your body cannot work well. You will suffer from weak musles, numbness and extreme fatigue.
One can improve B12 by consuming all dairy products (milk, curd, cheese) are a good source of Vitamin B12. In addition, one can include red meat once a week to boost vitamin B 12 intake
Vitamin B 12 plays a major role in digestion by providing the gut with enough supply of red blood cells. Lack of B12 has been associated with poor gut health affecting digestion and often inducing loose motions. Hence, taking adequate amount of B 12 is recommended to maintain proper digestive function.