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.
Hangover Prevention: 7 Foods To Eat Before Drinking. There's only one surefire way to prevent a hangover: drink in moderation or not at all. For those in search of a different strategy on New Year's Eve, certain foods can help ward off hangover symptoms if eaten before or during boozy festivities. Eat a real dinner and try to incorporate some of these snacks to avoid kicking off the New Year with a depressing day in bed. Foods That Prevent Hangovers. There's a reason the pickleback is a popular hangover cure: drinking robs the body of electrolytes and drinking salty brine can help replace them.