Disulfide bonds and cataracts
Cysteine oxidation:

Ascorbate
NAC
Folate
Cholesterol
Vitamin E
Omega-3
Magnesium

The eye lens proteins, or crystallins, contain a high number of cysteine residues. Under normal conditions, the thiol (-SH) groups of cysteine are reduced. However, due to oxidative stress from factors like aging or UV radiation, these thiol groups can be oxidized to form disulfide bonds (-S-S-).

Reducing agents are chemicals that break disulfide bonds by providing electrons to the sulfur atoms, converting them back to their reduced thiol form.

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dopaminergic dysfunction
dopamine
cortisol

Restless leg Periodic Limb Movements in Sleep (PLMS) dopaminergic dysfunction dopamine

Restless leg syndrome (RLS) and periodic limb movements in sleep (PLMS) are linked to dopaminergic dysfunction, which is a problem with the brain's dopamine system.

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Biological organisms naturally regenerate ammonia and other inorganic nitrogen sources into amino acids through a process called nitrogen assimilation.

RNS are highly reactive and unstable molecules that are toxic to cells, and organisms must first reduce them to ammonia before they can be assimilated into organic compounds.

Animals can reuse nitrogen through the glutamate-glutamine pathway, but must excrete excess nitrogen as urea because they cannot synthesize all amino acids.

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nac
N-acetylcysteine
cell senescence
senolytic properties

N-Acetyl-Cysteine (NAC) as a Senolytic and Anti-Aging Molecule

https://www.worldofmolecules.com/anti-aging-and-senolytics/N-acetyl-cysteine-molecule.html