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Because the shot bypasses your digestive system entirely, the vitamin B12 absorbs at near-100% rates and starts working right away

As we get older, our ability to absorb B12 from food naturally decreases, making injections a great option for many older adults

Keep away from direct sunlight

tells the Mayo Clinic, Low levels of B-12 and other B vitamins such as vitamin B-6 and folate may be linked to depression. Studies may be inconclusive, but at the very least, a holistic and integrated approach to ones health in the form of adequate vitamins and nutrients helps achieve a more balanced biology that certainly wont hurt your overall mood