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.
Dr. Pickering lays out three basic commandments of eating that he recommends you not deviate from: 1  No proteins and starches at the same meal, as they neutralize each other and prevent proper digestion of either food. To ensure proper digestion of each food, wait two hours after eating a starch before eating protein. And wait three hours after eating protein before eating a starch. No fruits and vegetables at the same meal. Fruits are either a single or double sugar, whereas the starches are a triple sugar.