B12 is used to initially treat B12 deficiency and anaemia
It has been experimented that plants do not contain vitamin B12, so individuals who follow a vegetarian diet, especially strict vegetarians who avoid all animal products, may not get enough B12 unless they consume fortified foods or supplements
Herrmann W, Obeid R
B12 shots offer a range of benefits, including increased energy levels, improved metabolism, reduced fatigue, sharper concentration, enhanced sleep patterns, mood elevation, and a strengthened immune system
[41] [42] Functional vitamin B 12 deficiency can also develop with heavy regular use of nitrous oxide N 2 O, also known as "laughing gas", by oxidizing the cobalt atom and inactivating the vitamin
When is the Best Time to Take a Vitamin B Complex Injection