1 In general, the total dissolved solids concentration is the sum of the cations (positively charged) and anions (negatively charged) ions in the water.  Parts per Million (ppm) is the weight-to-weight ratio of any ion to water.
If you refrigerate the rice, and you want to eat it cold, its perfectly fine. People eat cold rice salads all the time. Cold rice pudding is fine. Its just sitting around at room temperature that is the problem.
See results. Because sleeping after eating slows down digestion, it is advisable not to eat a heavy meal at night before sleeping. It is best to give your body around 3 hours to digest a heavy meal in order to get a good night's sleep.