Minxy84, could be worth asking for B12 and folate to be retested. Hold off supplementing until you know whether GP will agree. If refused, supplement 1,000mcg methylcobalamin sublingual lozenges, spray or patches.
Minxy, anything above 150 in your range is acceptable to NHS. 487 is probably 2- 5 years worth of B12 stored in your liver, so it isn't deficient, but it ain't optimal either.
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