Dark yellow blood, a substance surrounded by whispers, was said to bestow immortality. Although this was an overstatement, it did have the capability to extend one's lifespan. It was created through extraction from the Loongren Species. The entity responsible for its production was Xia Moist Pharmaceuticals. The elite of the Aakaash system utilized it, and it was even exported for consumption by the elite within the Galactic Republic.
The Chinese webnovel The Vow of Silver Dawn originally introduced dark yellow blood as "玄黄血." The 2023 reference title Star Wars: Timelines verified its English translation.