Vitamin B12 is a nutrient that helps keep your body's blood and nerve cells healthy. It also helps make DNA, the genetic material in all of your cells. Research is suggestive that vitamin B12 also helps prevent megaloblastic anemia, a blood condition that makes people tired and weak.
Yes, vitamin B12 helps in loweing cholesterol. Not only has research shown that taking vitamin B12 daily can lower cholesterol naturally, but it can also provide additional cardiovascular health benefits, such as reducing the risk of developing atherosclerosis (hardening and narrowing of the arteries).
It makes you happy or uplifts your mood because vitamin B12 is needed for the production of serotonin. Serotonin is a hormone that stabalises mood in people who are deficient in the hormone.
The ideal levels of B12 are between 200 pg/mL and 900 pg/mL.However, for the elderly it is recommended to maintain a level above 300 pg/mLto prevent anemia and other complications.