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10 Vitamins You May Need if You Have Crohn’s
Crohn's disease can damage the ileum, the lower part of the intestine necessary for vitamin B12 absorption. Sometimes portions of the ileum have to be surgically removed.
B12 deficiencies can manifest as weakness, fatigue, light-headedness, and megaloblastic anemia (larger-than-normal red blood cells). In extreme cases, it can damage the nerves, resulting in tingling or numbness in fingers and toes and difficulty walking.
If you have a true B12 deficiency, supplements won't be enough. Instead, you may need a once-a-month shot, says Dr. DeCross.
Next: Folic acid
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