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And it takes about 1,000 IUs to raise bl your blood levels by five nanograms per mil

They are often used to treat deficiencies that can lead to conditions such as anemia, neuropathy, and other neurological disorders

It's important to remember, though, that individual responses can vary

Indeed, serum GGT activity is a routine clinical measurement and is a risk factor for cancer 60

These include: Meat Fish Poultry Milk Eggs Fortified breakfast cereals Fortified breads Fortified nutritional yeasts Fortified plant milks If you follow a vegan diet (meaning you don't eat any animal products, including meat, milk, cheese, and eggs) or you're a vegetarian who doesn't eat enough eggs or dairy products, you could be lacking in vitamin B12