The probability of adverse effects will be decreased
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Those Experiencing Mood Issues: Vitamin B12 plays a role in brain health, so individuals dealing with mood swings, depression, or anxiety may find that B12 shots help improve their mental clarity and mood

and patients with pernicious anemia who have optic neuropathy COBALAMIN (Vitamin B12) Deficiency Causes Vegetarians (dietary deficiency) Older adults: atrophic gastritis affects 10% 30% and leads to decrease in hydrochloric acid secretion in the stomach and decreased absorption of Vitamin B12 The liver can store up to six years worth of Vitamin B12 so deficiencies are rare Effects of deficiency Megaloblastic anaemia (pernicious anaemia) Progressive demyelination of nerve cells Elevation in levels of circulating homocysteine that leads to production of defective collagen and elastin with a negative impact on arteries, bone and skin Deep vein thrombosis is associated with homocysteinemia that causes the activation of the intrinsic coagulation cascade Symptoms include fatigue, weakness, constipation, loss of appetite and weight loss Numbness, tingling of the feet imbalance, depression, confusion, dementia, poor memory and glossitis

Vitamin D, often called the sunshine vitamin, helps the body absorb calcium, supporting strong bones and teeth
There are B12 pills that can add B12 to the body, but they also rely on the bodys ability to extract nutrients