Green Tea And Weight Loss
Consider the following - One pound of fat (0.45 kilograms) is equivalent to approximately 3500 calories. Whether using green tea for weight loss
or any other method, in order to lose one pound of fat over the period
of a week, a person must maintain a calorie deficit of 3500 below their
normal "set point", that "set point" being the amount of calories
consumed in one's diet where a person neither loses nor gains fat. This
calorie deficit can come through the modification of diet, through
exercise, or a through a combination of both. In the case of a pound per
week weight loss, that works out to a needed calorie deficit of 500
calories per day.
Research by Japanese and other researchers(1)
suggest that if the average person were to drink five cups of green tea a
day, they would burn an extra 70 to 80 extra calories through an
effect known as thermogenesis - the process of heat production in organisms.
While much of the thermogenesis effect in green tea is derived from
caffeine, studies also suggest(2) that thermogenesis in green tea occurs
to some degree beyond its caffeine content from epigallocatechin
gallate (EGCG.)
Regardless, 70-80 calories per day does not
quite come close to the 500 calorie deficit needed per day to lose a
pound a week, and for sure it's nowhere close to the calorie deficit
needed to lose "inches per week" from one's waistline as some green tea
web sites would have consumers believe. According to the research, if a
person were to change nothing outside of adding five cups of green tea
to their diet per day, then over the course of 43 days one could expect
to lose 1 pound. Over the period of one year, one could expect a loss
of about 8 pounds. Yes, there is some correlation between green tea and
weight loss, unfortunately it's not on the level many would have you
believe.
Clearly, drinking green tea alone is not going
to be satisfactory for significant weight loss. Still, green tea can
still be quite useful as a weight loss aid. The extra 80 calories per
day can be just what a person needs to tip the scale from a calorie
surplus to a calorie deficit, especially when following a balanced
nutrition and exercise regime.
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