Forums Ask for advice B12 deficiency Reply To: B12 deficiency March 20, 2018 at 1:57 pm #378 janey 15 Posts My doctor said he did not test me because he knew I had an outdoorsey life, but it was the Vit D deficiency that really sunk me. Have a look at the Facebook Vitamin D wellness group – loads of information. https://www.facebook.com/groups/736193223162033/ It is so important. Now I am on Vit D3 which needs Vit K2 as a co-vitamin. Vit B12 with Folate so it can be absorbed, and Magnesium. With those, plus a probiotic in the morning I feel so much better. It is not particularly expensive, I get mine from Amazon. I do have a regular Vit D test as I am taking high levels and it can cause you problems as it is not water soluble, but the others are safe to take, if you take too much (within reason) you just pee them out. Sometimes the test is at the Drs, but he only does one a year, so I do another privately, they post you a kit and you post it back (to an NHS hospital) for £30. It is a finger prick test – not too painful. The Vit D the Drs prescribed me gave me an awful headache, it is actually carcinogenic, but the stuff I get online is not, and no headache.