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If the reason is less clear, the care team may recommend review of symptoms, outside records, or broader follow-up before turning B12 into a repeating plan
For more on how PCOS and insulin resistance connect to nutritional status, see our guide on insulin resistance and PCOS
If your levels were low to start, one injection helps refill your tank, and you may feel steadier for a couple of weeks
Other Signs and Symptoms of B12 Deficiency In addition to the above, a vitamin B12 deficiency may cause the following symptoms: Muscle weakness and muscle cramps
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