If you’re low or deficient in B12, you’ll likely feel fatigued. Your body’s cells need B12 to function properly. As such, having inadequate B12 levels can decrease normal red blood cell production, which can impair oxygen delivery This condition leads to the formation of large, abnormal, and immature red blood cells and impaired DNA synthesis It’s important to know that you can develop fatigue and other symptoms related to B12 deficiency, even when your B12 levels are considered within range or only borderline low
How Much To Get?
General symptoms of anaemia may include: extreme tiredness (fatigue)
lack of energy (lethargy)
noticeable heartbeats (palpitations)
hearing sounds coming from inside the body, rather than from an outside source (tinnitus)
loss of appetite and weight loss
Symptoms of vitamin B12 deficiency If you have anaemia caused by a vitamin B12 deficiency, you may have other symptoms, such as: a pale yellow tinge to your skin
a sore and red tongue (glossitis)
pins and needles (paraesthesia)
changes in the way that you walk and move around
changes in the way you think, feel and behave
a decline in your mental abilities, such as memory, understanding and judgement (dementia) Some of these symptoms can also happen in people who have a vitamin B12 deficiency but have not developed anaemia.
These conditions can often be diagnosed based on your symptoms and the results of a blood test. The longer the condition goes untreated, the higher the chance of permanent damag.
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Getting enough B12 from a multivitamin may to be fraught with problems for everyone. Most multivitamins do not have enough B12 to prevent or correct a deficiency. And many standard multivitamins contain B12 “analogs” that cannot even be used by the body.
There is even some evidence that vitamin C in a multivitamin may convert the B12 in the vitamin to a harmful analog. Without enough B12 you cannot metabolize folic acid. If you have any of the common gene variants that impair folate/B12 metabolism (MTHFR is the most studied) you could actually end up with functional deficiencies of both of these important B vitamins, while thinking you were protected by a daily multivitamin.
Too much folic acid in the presence of not enough B12 seems to increase disease risk across the board– it can mask the anemia and worsen the nerve damage of a B12 deficiency. Pills don’t work for everyone, and cannot take the place of parenteral B12 for everyone.