glutathione cat dose transferases in cats and dogs: diversity, structure, and function | Medicinal Chemistry Research Antioxidant status in adrenal gland

Subcutaneous administration of vitamin B12 is sometimes employed, especially in patients with congenital cobalamin metabolism disorders who require high doses to maintain normal metabolic pathways

A similar practice to counterbalance certain microbiome imbalances or deficiencies in infants and/or adults is not yet implemented for B vitamins but could be of interest

This aids skin recovery, which improves overall skin tone, resilience and luminosity over time

PLoS ONE 13 , 113 (2018)

Glutathione, often referred to as the bodys master antioxidant, plays a critical role in maintaining oxidative balance, supporting immune function, and detoxifying harmful compounds

[Mayo Clinic] Ghasemian M, Owlia S, Owlia MB