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In these conditions the high B12 almost never appears alone
[8] Natural food sources include meat, shellfish, liver, fish, poultry, eggs, and dairy products
Start low at 50 mg per day to assess tolerance, then titrate up to 100 mg if well tolerated
doi:10.1002/1099-0690(200301)2003:1 3.0.CO;2-I
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