Iron is a very slow acting mineral. I'd expect perhaps a month, to see changes, but one or two days? I've never heard of that.
The red cells in your body last 90 days...and some are replaced daily.
The iron in them when they are removed is recycled to your blood for the new cells.
People who get injections of B12 often report fatigue in between shots however. That is why using oral high dose is more like nature intended and does not give the wild swings in concentration that the injections do.
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Weezie looking at petunias 8.25.2017
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