does b12 injections cause constipation Shots: Vitamin B12 Benefits, Uses, Risks Signs You May Have a

B12 deficiencies can be asymptomatic but eventually lead to overall weakness, lightheadedness, the feeling of pins and needles, heart palpitations, vision changes, and more

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doi: 10.3390/microorganisms8081119

Approximately half of your B12 is stored in the liver

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Because other thiols such as cysteine and glutathione could replace homocysteine, the stimulation of smooth muscle cell proliferation probably was caused by nonspecific reactivity of the sulfhydryl group of homocysteine (Lubec et al, 1996b