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Stress, fatigue and brain fog as well as reduced physical stamina are common side effects of Vitamin B12 deficiency

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The body cannot synthesise vitamin B12 independently and must obtain it through dietary sources, primarily animal products such as meat, fish, dairy, and eggs

Some people use sublingual delivery (powder held under the tongue briefly before swallowing) but there's no strong evidence this meaningfully improves bioavailability for this compound class

Individuals with Pernicious Anemia: This condition affects the ability to absorb B12, often requiring lifelong supplementation