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You will have to figure out what your body does best on, but in general, I recommend using 5,000mcg per day in sublingual form as long as you are not extremely sensitive to supplements and/or medications

Supplementation strategies vary depending on the underlying cause of deficiency or risk factors: Oral supplements (typically 25-2000 micrograms daily) are suitable for individuals with adequate intrinsic factor production but insufficient dietary intake Sublingual or buccal preparations have no proven superiority over standard oral tablets at equivalent doses Intramuscular injections (usually 1000 micrograms of hydroxocobalamin) are the preferred treatment for pernicious anaemia and severe malabsorption

Minimum purity: 98%, supported by batch-specific analytical documentation where applicable

During the low-dose titration stages, you will use far less than 5mg in 30 days

Critics, including the FDA's own scientific staff, argue that insufficient evidence exists to ensure these compounds are safe for human use

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