Red Rice (Beras merah)

Red yeast rice (Chinese: 紅麴米, 红曲米; pinyin: hóng qú mǐ; lit. "red yeast rice"), red fermented rice, red kojic rice, red koji rice, or ang-kak, is a bright reddish purple fermented rice, which acquires its colour from being cultivated with the mold Monascus purpureus. In Japan, it is known as beni-koji (べにこうじ, lit. "red koji") or akakoji (あかこぎ, also meaning "red koji") and in Taiwan it is sometimes also called âng-chau (紅糟) in Taiwanese. Among the [Hakka]], it is known as fungkiuk. In China it is widely available under the brand name XueZhiKang (血脂康), and in Singapore it is available as Hypocol™. (see ref: Dennis Lee, M.D.)

Red yeast rice is sold in jars at Asian markets as a pasteurized wet aggregate, whole dried grains, or as a ground powder. It was a commonly used red food colouring in East Asian and Chinese cuisine prior to the discovery of chemical food colouring. It has also been used in Chinese herbal medicine.
Red yeast rice is produced by cultivating Monascus purpureus on polished rice. The rice is first soaked in water until the grains are fully saturated. The raw soaked rice can then either be directly inoculated, or steamed for the purpose of sterilizing and cooking the grains prior to inoculation. Inoculation is done by mixing M. purpureus spores or powdered red yeast rice together with the processed rice. The mix is then incubated in an environment around room temperature for 3-6 days. During this period of time, the rice should be fully cultured with M. purpureus, with each rice grain turning bright red in its core and reddish purple on the outside.

The fully cultured rice is then either sold as the dried grain, or cooked and pasteurized to be sold as a wet paste, or dried and pulverized to be sold as a fine powder. China is the world's largest producer of red yeast rice.