Indirect colorimetric detection of glutathione based on its radical restoration ability using carbon nanodots as nanozymes

- A new colorimetric sensor for glutathione is reported based on its radical restoration ability.
- This sensor exhibits high selectivity over nonthiolated amino acids.
- Carbon nanodots are used as a new generation of artificial enzymes (nanozymes).
- The method is advantageous over Ellman method for blood analysis due to lack of hemoglobin interference.