Would like to add to above thread , that she is suffering from Hypothyroidism. following questions , can someone relate to it or have heard anything about it :

Does B-12 deficiency cause :
- long/heavy periods ?
- Does it relate to irritability , sleep troubles?
- Severe back ache .

Is there anything else that can be taken apart from 1000mcg of methyl B-12 and 400mcg of folic acid ?
Too many questions , but any help is much appreciated . Thanks.