This densely packed 2021 review subject was taurine:
“Taurine (Tau), a sulphur-containing non-proteinogenic β-amino acid, has a special place as an important natural modulator of antioxidant defence networks:
- Direct antioxidant effect of Tau due to scavenging free radicals is limited, and could be expected only in a few tissues (heart and eye) with comparatively high concentrations.
- Maintaining optimal Tau status of mitochondria controls free radical production.
- Indirect antioxidant activities of Tau due to modulating transcription factors leading to upregulation of the antioxidant defence network are likely to be major molecular mechanisms of Tau’s antioxidant and anti-inflammatory activities.
- A range of toxicological models clearly show protective antioxidant-related effects of Tau.”
https://www.mdpi.com/2076-3921/10/12/1876/htm “Taurine as a Natural Antioxidant: From Direct Antioxidant Effects to Protective Action in Various Toxicological Models”