How long after turning vegetarian might iron deficiency anemia start to show up?

Not necessary. Contrary to what you might have heard on tv or some "experts", you don't necessarily get iron deficient just because you're vegetarian. Lots of vegetables, beans, & fortified bread are loaded with iron. Many cultures survived millennia on little to no meat & many others with almost no red meat. It depends on the variety of your diet & medical conditions present. Plus there's iron in eggs & fish.
Hopefully never. Humans have no way of getting iron out of our systems except blood loss; we regulate iron by how much we absorb in our small bowel. If someone is not losing a significant amount of blood (we all lose a little) legumes, broccoli and kale should enable a vegetarian to remain adequately iron saturated. We absorb iron slowly, but store it very well, allowing most to go years even without fe absorption.

Related Questions

How long after going vegetarian might iron deficiency anemia occur?

Man or woman? Female vegetarians would tend to lose iron more quickly and become anemic due to monthly menstrual losses. Pregnancy and breastfeeding also lead to iron loss. "heme" sources of iron (animal iron) are more readily digested than "non-heme" iron found in grains and vegetables, but vegetarians can get enough iron in a diet to maintain health. More info: http://1.Usa.Gov/9mbfej. Read more...

Some people with iron deficiency anemia crave and chew ice so much. Why is that?

I am not sure. We know exactly. It is known as pica. The ice is common in the north. In the south some people eat clay soil and or corn starch. Read more...

How to feed the child to prevent iron-deficiency anemia?

Oral iron supplement. You may give the child oral iron supplement. You may look of foods, e.g., cereals, with iron supplement. Read more...

What can you do to prevent symptoms of iron-deficiency anemia?

If the cause. Is heavy menstruation then control of the periods can be helpful. Iron replacement will correct the anemia, but it does take a few months. Read more...