Hi, I have recently begun taking b12 orally and not sure if I am taking enough.
My b12 level is 190 (180-900), and my GP is not willing to treat me, but doesn't seem bothered whether I take supplements or not. I have been experiencing tiredness, lethargy, heavy and aching limbs, frequent headaches, mental fogginess, memory problems, tingling and numbness in my hands, and palpitations. My hands and feet also burn. This has been getting increasingly worse over the past 18 months.
My iron stores are also low - my ferritin is 9 (15-40).
I am 50, and I think these symptoms have been mixed up with perimenopausal issues for some time, which is confusing the issue (intermittent menstruation, mood swings, anxiety, low-libido). My diet is pretty good, although I don't eat red meat. I do eat cheese, fish, dairy, lots of leafy veg, fruit and pulses, and a small amount of chicken/turkey.
My GP has prescribed 400mg ferrous sulphate a day (for 3 months) but said my b12 isn't low enough to treat. He said the iron deficiency could be causing all the symptoms.
My father has Pernicious Anaemia and has 3-monthly b12 injections.
I have decided to take b12 orally, and have bought some 1000mcg b12 methylcobalamin. Is one of these a day enough, or should I be starting on a higher dose? Also, how long approx will it take to be effective? I am starting to get a bit desperate...
Thanks for any help you can give!