Selenomethionine raises the levels of the GPX4 protein in specific human cells grown in the lab when those cells are stressed by lack of cystine or exposure to RSL3, and this effect occurs even when two key enzymes in the transsulfuration pathway are blocked.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Selenomethionine as a dual-mechanism ferroptosis inhibitor: selenium-supply-driven GPX4 biosynthesis beyond transsulfuration and reductive-capacity-mediated ROS scavenging independent of GPX4 activity

Randomized Controlled Trial

Animal & In Vitro

2026 Feb 14

Selenomethionine helps cells make more GPX4 protein, even when a normal pathway for making it is blocked — like giving your body a backup way to build a protective shield against cell damage.

Contradicting (0)

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No contradicting evidence found

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Source Study

Selenomethionine as a dual-mechanism ferroptosis inhibitor: selenium-supply-driven GPX4 biosynthesis beyond transsulfuration and reductive-capacity-mediated ROS scavenging independent of GPX4 activity

Score: 13

DOI: 10.1038/s41419-026-08466-x

Similar Assertions

Selenomethionine, a form of selenium, can still prevent cell damage and death in human cells even when the GPX4 protein is completely removed, suggesting it blocks a type of cell death called ferroptosis through a different pathway than previously thought.

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73%

Selenomethionine decreases markers of oxidative damage and cell death in human cancer cells under conditions that trigger ferroptosis, such as exposure to RSL3 or lack of cystine.

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72%