This is due to less stomach acid and intrinsic factor, making absorption harder
High-Purity Research Formulation : Supplied as a lyophilized powder with identity and composition verified through HPLC and mass spectrometry, ensuring consistent laboratory performance and batch-to-batch reliability
Specifications Purity: 99% (HPLC Verified) Ratio: 12.5 mg / 2.5 mg Appearance: Lyophilized Powder Format: Research Compound Storage: Store at 20C
[6] [3] [10] A mild deficiency may not cause any discernible symptoms, but moderate deficiency can cause various symptoms, such as feeling tired, lightheadedness, headaches, cold intolerance, pale skin, sore tongue, upset stomach, loss of appetite, hair and skin color changes, numbness or tingling (pins and needles) of the fingers and toes, and tinnitus, and vision, cognitive or psychological problems
2002 Dec 19-26;420(6917):812-6