Re: difference between warm and cold water?
There are two different water theories here, and both are actually true.
1. Dietary Thermogenesis
The ‘thermogenic effect’ described as meal-induced heat production – the calories burned in the process of eating, digesting, absorbing and using food. When you consume ice cold water, your body burns additional calories in an effort to warm it. You can also increase metabolism by eating spicy foods. Its important to understand though, that dietary thermogenesis really only accounts for burning about 10% of the calories you consume. Drinking ice water may influence that percentage slightly, but not by much.
2. Liver detoxification
The more water you drink, the more you support your liver function which improves your metabolism greatly. The liver is the primary organ responsible for metabolizing fat, carbs, and protein... but it also is responsible for removing toxins from your system. When your toxicity level is high (most people today have high toxicity levels from preservatives and chemical additives in food, medications, and the environment) the liver reaches a point of exhaustion trying to do all this extra work and as a result, the metabolsim suffers. By dramatically increasing water intake, you help the liver and kidneys excrete toxins from your system, resulting in improved metabolism. In this case, reducing consumed toxins (preservatives and chemical additives in food like artificial sweeteners, diet sodapop, coffee, sodium nitrates, msg, etc) will also dramatically improve metabolism. The recommended amount of water to acheive liver detoxification is (body weight/2) in ounces (for example, if you weigh 150, drink 75 ounces of water per day). Here, the temperature of the water is irrelevent.
I believe that consuming water for the purpose of liver detoxification has a much greater impact on weight loss than dietary thermogenesis.