IF you use cold water, your body has to make up the lost heat. This requires energy which comes from burning calories, meaning you will have to eat sooner. Food

IF you use cold water, your body has to make up the lost heat. This requires energy which comes from burning calories, meaning you will have to eat sooner. Food is not free energy, and in many cases is probably a lot less efficient energy-wise than hot water when you think about the energy it takes to grow, prepare, package, and ship it. This is why I started the Lukewarm Water Hand Washing Awareness Coalition (LWHWAC). We've been fighting for years to raise awareness of the dangers of washing hands in both hot and cold water by lobbying to get our messages in schools, holding bake sales, running TV and radio advertisements, streaking through hot water heater sections of department stores, and holding flyering campaigns.