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Message: <blockquote data-quote="rajitha.wijayaratne" data-source="post: 31188498" data-attributes="member: 563228">ChatGPTShort answer: most long-living vegetarians are not actually B12-deficient, even though B12 isn’t naturally abundant in plant foods.<h2>Why many vegetarians are not B12 deficient in real life</h2><h3>A. Fortified foods (the biggest reason)</h3>In modern societies, many vegetarians consume B12 from:<ul> <li data-xf-list-type="ul">Fortified breakfast cereals</li> <li data-xf-list-type="ul">Fortified plant milks (soy, almond, oat)</li> <li data-xf-list-type="ul">Nutritional yeast (fortified)</li> <li data-xf-list-type="ul">Meat substitutes (often fortified)</li> </ul>Even small daily intakes are enough because:<ul> <li data-xf-list-type="ul">Adults need only ~2.4 µg/day</li> <li data-xf-list-type="ul">The liver stores years’ worth of B12</li> </ul>So someone may appear “dietarily vegetarian” but biochemically sufficient.<h3>Dairy and eggs (for lacto-ovo vegetarians)</h3>Many “vegetarians” are not vegan.B12 sources include:<ul> <li data-xf-list-type="ul">Milk, yogurt, cheese</li> <li data-xf-list-type="ul">Eggs (less, but still some)</li> </ul>These can provide enough B12 to prevent deficiency, especially combined with fortified foods.<h3>D. Long body storage of B12</h3>The body stores 2–5 mg of B12, mainly in the liver.<ul> <li data-xf-list-type="ul">Daily loss is tiny (~0.1%)</li> <li data-xf-list-type="ul">Deficiency can take 3–10 years to appear</li> <li data-xf-list-type="ul">People who switch to vegetarianism later in life may never reach deficiency</li> </ul>This means:Some people live long lives without dietary B12 intake for years — because they’re living off past reserves.</blockquote>

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