VK2809 (formerly known as MB07811) is a thyromimetic prodrug whose active form is selective for the THR-β isoform.

It is being developed by Viking Therapeutics in a phase II trial for the treatment of nonalcoholic steatohepatitis[1][2] and is also being investigated for glycogen storage disease type Ia.

[3] In 2023, Viking Therapeutics filed a lawsuit against the developer of ASC41, Chinese company Ascletis BioScience, accusing it of stealing Viking's trade secrets to develop ASC41 which is allegedly similar to, or identical to, VK2809.

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