Why does methylcobalmin supplementation make me feel worse and Increases my fatigue. Pain, Brian fog, headaches, anxiety. Nervousness, tremors, and GI disturbances like stomach bloating, including. Rash, . Seems to cause more nerve damage? Pain In chest and legs. Also anger irritability and anxiety from increased methyl groups in the body. Will adenosylcobalmin or hydroxycobamin help me more ? My b-12 levels are always within 650-850 range. So I don't agree with the value as it could still be functional deficiency since the b-12 is not absorbed/ having adverse effects ? Is it too much mb-12? These effects last 3-4 days and happen with doses as little as 1000mcg. Please answer ?