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Description
Generally, it is a result of insufficient intake of foods containing Vitamin B12 or the body's inability to absorb it from the food you consume

While it is vital for overall health, overconsumption, especially through high-dose supplements and foods, an excessive intake of this vitamin may have harmful side effects
Vitamin B12 is only found naturally in animal products and dietary sources include liver, fish, meat, eggs, dairy products, yeast extract (such as marmite) and foods that have been fortified with B12
Ghergherehchi et al., 2016, 2019a, b
They think, If I just jab this, Ill be sorted, he says
