Quick Answer: Reduced glutathione is the active form of the molecule itself
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
By supporting your body with targeted supplements you can take an active role in your healing journey
While the active ingredient is intended to be the same, differences in concentration, contaminants, or other ingredients could lead to unexpected responses
That gap between cell evidence and clinical outcome is the gap the field has not yet closed