Does Cold Water Help You Lose Weight?

When drinking cold water, our body burns calories, bringing it to thermal equilibrium with the body at a temperature of approximately 37 ºC. Thus, it is natural to imagine that the consumption of cold water helps in weight loss, but this concept is wrong.

All the foods we eat provide us with the energy necessary for the body’s vital functions. Although there are exceptions, the human body needs, on average, an intake of 2000 kcal (kilocalories) daily. In practice, this means that if our body consumes more calories than we eat, we lose weight.


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In this context, what is the impact of a glass of cold water on our daily calorie intake? For this, we will use a well-known equation: the fundamental equation of calorimetry, used to calculate the sensible heat.

In the above equation, Q is the amount of heat, which can be measured in calories (cal) or Joules (J); m is the mass of the body in grams (g); c is the specific heat of the water in lime / g ºC (or lime / g.K); and ΔT is the temperature variation suffered by the body in ºC or K (the temperature variation in these two measurements is the same).

Based on the equation, we will answer the following question: How many calories do you need to heat a 200 ml glass of ice water at 4ºC, up to the equilibrium temperature with the human body (37ºC)? The specific heat of the water is 1.0 cal / g ºC, which means that, to vary the temperature of 1 g of water in 1ºC, 1 cal is consumed. Observe the following calculation:

In the calculation above, we used 200 g for the body of water, as its density is 1.0 g / ml. The result indicates that if we ingest 200 ml of water at 4ºC, at least 6.8 kcal (6800 cal) will be consumed. Regarding the daily caloric intake, of approximately 2000 kcal, this result is practically insignificant, as it represents less than 1% (0.3%) of the total calories we eat.

Some calculations indicate that to lose 1 kg of fat, it is necessary to consume about 7500 kcal by performing physical activities or reducing caloric intake. To achieve the same thing with the intake of cold water (at 4 ºC), it would be necessary to consume about 220 liters – an impractical amount, large even for a period of one month. Therefore, there are more viable strategies for losing fat, such as decreasing calorie intake and regular physical exercise. It is worth saying that this does not imply reducing water consumption, since it is extremely important for the entire metabolism of the body.

By Rafael Helerbrock
Graduated in Physics

5 Facts about water you need to know!

Water is essential for life and we depend on it to do everything around us, whether directly, such as drinking, cooking, watering a plant, or indirectly, such as the use of water in the production process.

In addition, water permeates many paths and is associated with our beliefs, culture, religion, economy and practically everything that surrounds us. Check out some very interesting facts about this precious asset:

1) WATER IS UNIQUE.

Water is the only substance that occurs naturally in the 3 states of matter: gaseous, solid and liquid.

2) DID YOU KNOW THAT THE EARTH HAS A NICKNAME?

Surely you know someone by their nickname, or maybe you have one yourself, don’t you? Know that our planet earth also has one: Planet Water (or Planet Blue?)!

This nickname came from the fact that 75% of the Earth’s surface is covered by water! And Brazil is the country that has the largest amount of fresh water in the world, with 12% of the planet’s total.

3) WATER ROUNDS THE WALL?

This phenomenon of water rising up the wall is called capillarity. When this occurs, the damp wall begins to show continuous stains on its underside, causing moisture on the walls and that unpleasant musty smell.

4) HOW TO PUT 74 LITERS OF WATER IN A GLASS?

It may seem impossible, but to produce a 250 ml glass of beer we need 74 liters of water. This water is within the concept called Water Footprint.

5) WHAT IS THE WEIGHT OF A CLOUD?

According to researcher Peggy LeMone (National Center for Atmospheric Research) the exact weight of a cumulus is 500,000,000 grams of water or 500 tons. That weight is equivalent to 125 adult elephants!