Should I take an iron pill that is approved by the scd diet or should i get an iron injection?
See here http://www.breakingtheviciouscycle.info/knowledge_base/detail/iron-supplements/
Iron shots will work, but are painful. I've known some people who have had them and say they are worth it. Iron can be slowly raised by eating iron rich foods and very importantly vitamin c at the same time. Many people don't eat/ingest the iron at the same time as the vitamin C (juice, fruit, vegetable or supplement) and they can become low in iron from this. People may find a chelated iron supplement that they tolerate.
I found that even the SCD legal chelated iron really bugged my gut. On breakingthevicioscycle.info Elaine says to not take iron. I ended up getting IV iron, and the last time I got my blood taken my levels were up. Hope this helps!
Elaine okay-ed chelated iron, since it's gentle on the gut. However, if you find it bugs your gut, then definitely stay away.