From the Research
Vitamin B12 deficiency is not typically a direct cause of delayed periods, though severe deficiency can potentially affect menstrual cycles as part of broader health impacts. If you're experiencing delayed periods, it's more likely due to other factors such as stress, hormonal imbalances, weight changes, excessive exercise, thyroid disorders, polycystic ovary syndrome (PCOS), or pregnancy. While ensuring adequate B12 levels is important for overall health, specifically taking B12 supplements alone probably won't regulate your menstrual cycle if other factors are causing the delay. The recommended daily allowance for B12 is 2.4 mcg for adults, which can be obtained through foods like meat, fish, eggs, and dairy, or supplements if needed, as noted in studies on vitamin B12 deficiency 1.
Some key points to consider:
- B12 deficiency can have various causes, including malabsorption, defects in cellular delivery and uptake, and limited dietary intake 1.
- The consequences of B12 deficiency can be variable, depending on the degree and duration of the deficiency, and can affect major organ systems including the blood, bone marrow, and nervous system 1.
- Diagnosis of B12 deficiency rests on clinical suspicion followed by laboratory testing, which consists of a panel of tests that together provide clinically reliable predictive indices 1.
- It's essential to consult with a healthcare provider for proper evaluation rather than self-treating with B12, as they can determine if you need hormonal therapy, lifestyle modifications, or treatment for underlying conditions 2, 3.
In terms of management, oral administration of high-dose vitamin B12 (1 to 2 mg daily) is as effective as intramuscular administration for correcting anemia and neurologic symptoms 2. However, this should be done under the guidance of a healthcare provider, especially if you're experiencing delayed periods, to rule out other underlying causes and determine the best course of treatment.