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What Happens After Your First B12 Injection Following your first B12 injection, several physiological processes begin immediately, though you may not feel different straight away
[16] In the absence of intrinsic factor or distal ileum receptors, only months to a year of vitamin B 12 are stored
Taking vitamin B12 can help restore and boost levels of serotonin and other neurotransmitters to improve mood and ward off depression
(16) How Much Vitamin B12 Do You Need
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