Which symptoms mean I should seek urgent medical advice
The policy recognizes that research needs can change and institutions need assurance on product quality and suitability for their specific experimental applications
This ensures it works well and is safe for the patient
Some patients get paradoxical fatigue or headaches from B12 due to detoxification effects, in which case lower your dose
Various versions of the test have used different methods to measure the amount of B12 absorbed
4,5 Dietary insufficiency, pernicious anemia (i.e., an autoimmune process that reduces available intrinsic factor and subsequent absorption of vitamin B 12 1,2,6,7 ), and long-term use of metformin or acid-suppressing medications have been implicated in B 12 deficiency