People who need B12 should really have blood work first, before starting.
RLS can also be due to anemia. Did you have complete CBC to
evaluate that?
Low magnesium levels will also cause RLS. One treatment is to use a quality magnesium supplement (not the OXIDE form) to see if that helps.
If you were very low in B12 to start with, and then took it when you were anemic, then it would rob potassium from your serum to make the new red blood cells. This can cause twitching and cramping and muscle weakness in some people. That can be handled by eating potassium rich foods. The effect wears off as the red cells are replenished and brought up to normal.
I'd really get some B12 testing done if I were you.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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