Thats where B12 injections come in
Several pathologies are related to lowered mitochondrial Glutathione, including hypoxia (low levels of oxygen in body tissues), aging, liver diseases and neurologic disorders
They found that participants who took any form of supplemental vitamin D (D2, D3, or D3 with calcium) had a 40% lower risk of developing Alzheimers than non-supplementers
doi:10.1038/nrm.2017.16
This is clearest in complex injuries such as joint damage (cartilage, ligaments, tendons, and bone), surgical wounds (skin, muscle, fascia, and internal tissue), or systemic conditions affecting multiple organs
Jun 1 (2002) 99(11):41008