Tuesday, March 17, 2015

Iron Supplements -- When to Take

This post is probably only of interest to people who are anemic or know people who are anemic.

I'm posting some information about taking iron supplements, because the information doesn't seem to be available on the bottle, and iron deficiency is not uncommon. However, too much iron can be very bad for you, so don't take iron supplements without blood tests to confirm that you need more iron and blood tests to confirm when you have enough.  On the other hand, most people's digestion will limit iron absorption to prevent overdose. To paraphrase an article, "iron is absorbed with a rate that's reverse logarithmic with respect to current iron stores", i.e., if you have a good iron store, much less is absorbed.

Here are guidelines for how to take an iron supplement:
  • Best is on an empty stomach
  • Alternatively, at least two hours after and one hour before a meal
  • One hour between the supplement and tea or coffee
  • Two hours before and after medications or supplements (iron, like calcium, can interfere with the absorption and operation of many different medications and supplements)
  • If you have to take them with food to avoid nausea, not with foods or supplements with calcium, caffeine, tannins (tea) , fiber, phytates (legumes, grains), soy, polyphenols (wine, fruits, vegetables, nuts)
http://www.mayoclinic.org/drugs-supplements/iron-supplement-oral-route-parenteral-route/proper-use/drg-20070148

http://www.nlm.nih.gov/medlineplus/ency/article/007478.htm

http://www.patient.co.uk/medicine/iron-supplements