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When you receive your test results, its important to note that optimal B12 levels should be between 700-900 pg/mL

The NHS notes that taking up to 2,000 micrograms daily is unlikely to cause harm in most people, though there is generally no benefit to such excessive amounts without confirmed deficiency

Intramuscular administration of vitamin B12 is often preferred for its rapid improvement in patients with severe deficiency or severe neurological symptoms

For example, some researchers constructed a thymine auxotrophic Lactococcus lactis strain by knocking out the thyA gene [211]

Combined treatment with Myo-inositol and selenium ensures euthyroidism in subclinical hypothyroidism patients with autoimmune thyroiditis