Drink Healthy Drinks

There are two ways to lose weight, either reduce energy intake, or increase energy expenditure. Because hypothyroidism, even after treatment, may reduce energy expenditure in some people, patients naturally are looking for options that can help safely help raise the metabolism.

Metabolism (pronounced: muh-tah-buh-lih-zum) is a collection of chemical reactions that takes place in the body’s cells to convert the fuel in the food we eat into the energy needed to power everything we do, from moving to thinking to growing. Specific proteins in the body control the chemical reactions of metabolism, and each chemical reaction is coordinated with other body functions. In fact, thousands of metabolic reactions happen at the same time - all regulated by the body - to keep our cells healthy and working.

In a study reported on in the American Journal of Clinical Nutrition, it was found that green tea extract resulted in a significant increase in energy expenditure (a measure of metabolism), plus also had a significant effect on fat oxidation. While some of the effects were originally theorized to be due to the caffeine content of green tea, the researchers discovered that the tea actually has properties that go beyond those that would be explained by the caffeine.

The same amount of caffeine as was in the green tea, administered alone, failed to change energy expenditure in other studies. This led researchers to believe that there is some interaction going on with the active ingredients of green tea that promotes increased metabolism and fat oxidation.

The researchers indicated that their findings have substantial implications for weight control. A 4% overall increase in 24-hour energy expenditure was attributed to the green tea extract, however, the research found that the extra expenditure took place during the daytime.

Thermogenesis is the process by which the body generates heat, or energy, by increasing the metabolic rate above normal. This rise in metabolic rate is referred to as the thermogenic effect, thermogenic response, or specific dynamic action (SDA). Thermogenesis is activated by a few different mechanisms, including supplements, nutrition, exercise, and exposure to cold.

This led them to conclude that, since thermogenesis (the body’s own rate of burning calories) contributes 8-10% of daily energy expenditure in a typical cubject, that this 4% overall increase in energy expenditure due to the green tea actually translated to a 35-43% increase in daytime thermogenesis.

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