from ChatGPT:
Best Practices for Soaking Rice:
4. Does Soaking Remove Nutrients?
Conclusion:
Soaking rice in moderation (typically 30 minutes to 2 hours) does not lead to significant nutrient loss and can actually make rice more nutritious and easier to digest, especially for whole-grain varieties like brown rice and black rice. Just be cautious with long soaking times and try to avoid soaking for more than 12 hours, as that may lead to more nutrient loss.
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The black color of black rice is not due to dyeing; it is a natural characteristic of the rice. The color comes from anthocyanins, which are natural pigments found in the outer husk of the rice. Anthocyanins are the same type of pigments that give certain fruits and vegetables, like blueberries, red cabbage, and purple grapes, their distinctive color.
When you wash black rice, the water turns black because the anthocyanin pigments leach out into the water. This is a normal process, and the color is natural, not artificially added. The black color of black rice also indicates that it is a whole grain, with its husk intact, which preserves the nutrients and fiber.
Black rice, often referred to as "forbidden rice," is prized for its high levels of antioxidants, fiber, and various micronutrients, making it a healthy choice.