glutathione and the brain Imaging depletion in rat using ascorbate-derived hyperpolarized MR PET probes l-glutathione brain inflammation nih Changes

Granulosa cell metabolism at ovulation correlates with oocyte competence and is disrupted by obesity and aging

As Gambit62 says, B12 is also reserved in the liver

Cysteine has a role in protecting neurons from oxidative stress

Agronomy2023

Investigations are guided by clinical suspicion rather than routine panels: for example, thyroid function tests and ferritin may be checked if symptoms suggest deficiency or thyroid disease, while an androgen profile may be appropriate in women presenting with menstrual irregularity, hirsutism, or acne

Although glucagon action is primarily liver specific, glucagon receptors have been reported to be present in membranes of human adipose tissue (83), suggesting that direct action of glucagon likely plays an important role in regulating human, as well as rodent, lipolysis