homocysteine glutathione redox Cysteine metabolic circuitries: druggable targets in cancer Glutathione Metabolism - an overview
Description
The presence of immune cells, such as microglia and astrocytes, within the tumor microenvironment can also contribute to tumor resistance and progression [101]

The most common cause is aging

Yao, Nanosensor composed of nitrogen-doped carbon dots and gold nanoparticles for highly selective detection of cysteine with multiple signals

The flashes arent great
