Why wouldn't water provide calorie for our body?

Question

Like, when we break the chemical bond in water, it would release energy, right? but why wouldnt this energy provide calorie to us, just like carbs, protein, fat, and alcohol.

Answer 1

Because we can't metabolize water. Water is a very stable compound. To convert water into anything else requires the input of energy. Your question has a wrong statement. Energy has to be put into something to break a bond. Forming bonds releases energy, not breaking them.

So, we get energy out of carbs, etc., because as we break down the compound to other things, the bonds that are formed release more energy than is required to break the bonds in the compound.

Answer 2

A calorie is a measure of energy, water cannot be digested, the energy realesed in water, acually abosorbed. Is in the form of heat. The chemical reaction is H20 + energy --> 2(H) + 0. Its endothemic. Plus your thinking calories stored as ATP and stuff and thats just suger. Protiens give nutrition, not calories. Its a similar but different definition.

Answer 3

A calorie is a measure of heat or energy. We break down carbohydrates and fats for energy. We do not break down the compound water in our body.

Answer 4

Energy is released when new bond is formed not when it is broken. And from water in your body (when it goes into some chemical reaction) you only get water, so sum of that processes, from energy point of view is zero. That's why.

Answer 5

Water will not provide calorie for our body simply because it is devoid of carbon skeleton. Generally, energy is locked in carbon containing compounds. In these compounds, carbon is covalently bonded to hydrogen and oxygen as in carbohydrate and lipid.

Answer 6

water in our bodies is simply being used as a solvent and not as a matter by itself , so it doesnt break to release the energy that can be released when we do a reaction out side our bodies

Answer 7

In plant life, CO2 is blended with water in photosynthesis to make glucose, the main source of ability for all residing beings. human beings get this glucose from the two eating the plant life rapidly or eating animals that have eaten plant life. interior the physique, whilst cellular respriation happens, the glucose is "burned" (blended with oxygen) and the water and CO2 are released. This breaking of glucose into water and carbon dioxide powers the mechanism in which ATP is made, that's in truth ability for the physique.

Answer 8

Because water is 2 hydrogens bonded to one oxygen. It is not breaking down in your body it is simply diffusing across tissues.

Answer 9

because we don't break down water. we use it as is so it has no calorie value

Answer 10

I think the bond between H and O in water is too strong to break by body enzymes.

But read this

Water: Vital Link to Life
Water serves as the body's transportation system. It is the medium by which other nutrients and essential elements are distributed throughout the body. Without this transport of supplies the body factory would stop. Water also works as the transport for body waste removal.
Water is a lubricant. The presence of water in and around body tissues helps defend the body against shock. The brain, eyes and spinal cord are among the body's sensitive structures that depend on a protective water layer. Water is present in the mucous and salivary juices of our digestive systems. This is especially important for moving food through the digestive tract. Persons who experience reduced salivary output soon will realize that foods taste differently and are harder to swallow. As a lubricant, water also is helpful for smooth movement of bone joints.
Water participates in the body's biochemical reactions. The digestion of protein and carbohydrates to usable and absorbable forms depends on water as part of the chemical reaction.
Water regulates body temperature. Our health and well-being are dependent on keeping body temperature within a very narrow range. The human body, which is made of 60-75 percent water, serves this function quite well. Water itself changes temperature slowly and is able to help regulate body temperature by serving as a good heat storage material.

Evaporation of water from body surfaces also helps cool the body. Sweat loss that is barely noticeable occurs every day and night. Individuals may lose up to a pint of water each day in this manner. In hot, humid weather or during exercise, increased sweating and losses of water are more visible.
Water Balance
Each day water losses are balanced with water intake. The body has a sophisticated system that works to maintain water balance. Few of us ever experience malfunctioning of this system. Thirst is a trigger that reminds us to take in more water. At the same time our kidneys regulate urinary output.

Is There a Daily Requirement?
Unlike many of the nutrients, there isn't a specific daily recommendation for water intake. Part of the reason is the variability in individuals related to the climate in which you live, physical activity, age, state of health and body size. Under typical circumstances adults may replenish up to six or eight cups of fluid each day.

Typical water output is two quarts or more of water each day. Water losses in urine account for about three-fourths of daily losses. Remaining losses come from sweat, as tiny water droplets in the air we exhale, and through feces. Infrequent urination or dark yellow urine may be an indication you could use more fluid intake each day.

Water Sources
Water comes from a variety of sources. All beverages or fluids are a source of water. Even solid foods contain water. Lettuce, celery and other crisp vegetables are composed of 90 percent or more water. Protein-rich foods such as meat, fish or chicken may contain as much as half to two-thirds their weight in water. Even grain products, which don't seem watery at all, may be up to one-third water.

Fats, such as butter or margarine, and sugar are among the foods that contain the least water. Some water, perhaps one to two cups per day, comes from inside our bodies as a by-product of energy metabolism. This amount is small but significant.

It is important to be aware of fluid intake. Even though solid food is a source of water, additional water from drinking fluids is needed. Besides plain water, juices, milk or other beverages boost fluid intake. You have a choice whether your fluid is simply water or an energy-rich beverage that may or may not contain other nutrients. Base this selection on your need for extra calories/and or additional nutrients.

Special Needs
Under special circumstances, fluid intake and output should be more carefully monitored. Examples of the special circumstances follow:

Infants, young children and older folks. Children have lower sweating capacity than adults. They tolerate high temperature less efficiently. Frequent vomiting and severe diarrhea in infants and young children quickly can lead to water dehydration.

Older folks may be at increased risk for dehydration because their thirst mechanism may not be as efficient as at younger ages. The influence of medications and the presence of disease are other factors that affect fluid intake and water balance. For both the young and the old, encourage water intake often.

Athletes. Of all nutritional concerns for athletes, the most critical is adequate water intake. The athlete's immediate need for water is to control body temperature and to cool working muscles. Lack of water, above all other nutrients, has the ability to hinder performance and lead to serious complications. For example, fluid loss of 2 to 3 percent of body weight by sweat- ing impairs performance. Fluid losses of 7 to 10 percent of body weight result in heat stroke and death.

Two to 3 percent fluid loss in a 150 pound individual represents three to four and a half pounds of body weight or one and a half to two quarts lost water. Marathon runners and other long distance athletes may lose up to three quarts (or six pounds) of sweat per hour.

To prevent dehydration during exercise, athletes should drink fluids before, during and after activity. Even exercise in cold weather results in sweat production and requires adequate fluid replacement. Although electrolytes such as sodium also are lost through perspiration, the immediate need is for water alone. In most circumstances sodium and other electrolytes can be replaced after exercise. Seasonings (especially salt) on foods at regular meals usually will do the trick.

During exercise or athletic events thirst is not always a reliable gauge of fluid needs. The best approach is to go into the event with adequate fluid intake. Table I outlines six basic steps for keeping fluid levels up during sports activities.

Water balance in children involved in sports or physical activities is a special concern. Children have lower sweating capacity and less tolerance for hot temperatures. They need frequent fluid intake in order to regulate body temperatures. A water bottle or ready water supply should be handy during all sports activities.

Parents, coaches and others should remember that younger children also take longer than adults to adjust to warm weather following cool winter temperatures. It is especially important to watch fluid intakes during the adjustment time.

Outdoor workers: The combination of hot, humid temperature and physical activity places outdoor workers at special risk for water balance. Anyone who works or plays hard outside, especially in hot weather, needs to keep water handy.

Table I. Six Basic Rules for Fluid Replacement During Sports Events
Cool water between 40-50°F is best.
Plain water is best. Sugar and electrolytes in fluids may slow emptying from the stomach.
Don't depend on thirst. Drink ahead of your thirst.
Drink water before a sporting or activity event. Two cups of water about two hours before an event is about right. Follow this with one cup of water about 15 minutes before the event.
Sip water during an event (1/3 to 3/4 cup every 10-20 minutes). The body cannot absorb more than about one cup every 20 minutes.
Weigh before and after a sporting event or heavy workout. After the event replace two cups water for every one pound lost.
Sipping throughout the work period is better than saving up for scheduled meals or breaks. Pay particular attention as you shift from cool weather to warm weather because it takes a few days for your body to adjust to the warmer temperatures.

Water and Other Elements
We often hear recommendations for increasing fiber intake in our daily diets. Adequate fiber intake is helpful for regulating bowel movements and, possibly, lowering serum cholesterol levels.

Persons with low fiber intakes who wish to increase their use of fiber-rich foods should increase fluids as they increase fiber. If not, they can experience extreme discomfort and risk having an impacted bowel. Dentists recommend fluoridated water for reduction of tooth decay. If community water is not naturally fluoridated, fluoride may be added. Fluoride concentration of one part per million (1 ppm) is considered safe while helping to increase the hardness of tooth and bone tissue. In some areas, natural waters are known to contain too much fluoride which can result in permanently discolored and mottled teeth.

Water purity in relation to nitrate content1, bacterial contamination and other substances is a concern in some areas. Individuals who use private wells or water systems should have their water quality tested on a regular basis.