Body Fat and BAC Readings

Body Fat and BAC Readings

As a general rule, most individuals process one standard drink (one beer, one glass of wine, or one shot) per hour. Peak BAC is lower with food in the stomach than without food.

The following is a generally accepted guide to the effects of alcohol. Since your body can absorb alcohol faster than it can metabolize it, alcohol can build up in your bloodstream. If you drink faster than you metabolize your drinks, you build up acetaldehyde in the liver, your BAC level rises more quickly, and the effects of alcohol increase. The more you drink, the more time it will take for the alcohol to be eliminated from your system.

Blood alcohol concentration (BAC) refers to the amount of alcohol in your blood in relation to the amount of water in your blood. For example, if two people each have blood alcohol levels of 20 mg/dL, the alcohol will metabolize in about an hour in each person, but their BACs can be very different. Your body absorbs alcohol more slowly when you have food in your stomach. Those who drink on an empty stomach will feel the effects of alcohol more quickly.

A person’s BAC is the most common measure of how much alcohol remains in their system. Many factors influence alcohol processing speed, including biological gender, body weight, medications or recreational drugs, food intake, medical health issues, and drinking pace. This means that no two people metabolize alcohol at the exact same pace. However, alcohol processing is remarkably consistent for most individuals.

How does alcohol move through the body?

Also, women generally have lower levels of the enzymes that metabolize alcohol than men. This is one reason why women generally reach a higher concentration of alcohol in the blood and can become more impaired than men after drinking the same amount of alcohol. Finally, there are other considerations, such as age and health, that also can affect how quickly you process alcohol. Absorption.When you drink an alcohol beverage, it immediately begins to be absorbed into your bloodstream, partly from your stomach and more actively from your small intestine.

The amount of alcohol in the body is measured in blood alcohol concentration (BAC) levels. Also known as blood alcohol content, BAC is the percentage of alcohol in the blood. For example, in the United States, a BAC of 0.1 would mean that the individual’s blood is 0.1% alcohol. In most countries, a BAC 0.08 is considered legally intoxicated.

Since the maximum concentration reached is less, a person who has the lower peak alcohol level takes a shorter time to clear the alcohol from the body than one who has a higher peak level. Consumption of alcohol with food can increase alcohol clearance by 1 to 2 hours, and increase the rate of alcohol metabolism by between 36% and 50%, as compared to consumption on an empty stomach.


The absorption time varies based on the concentration of the alcohol drink and whether the alcohol is taken with food or on an empty stomach. When a person hydrates by drinking plenty of water, it can give their liver time to metabolize the alcohol in their body, as well as spacing out the alcoholic drinks they consume. When ingested, alcohol passes from the stomach into the small intestine, where it is rapidly absorbed into the blood and distributed throughout the body. Because it is distributed so quickly and thoroughly the alcohol can affect the central nervous system even in small concentrations.

A 140-pound woman who consumed just as many drinks in one hour has a BAC of 0.048. The more you drink, the longer it takes for alcohol to leave your body. One standard drink, which is equal to 12 ounces of regular beer, will generally raise a 150-pound adult’s blood alcohol content to between 0.02 and 0.03. However, the affect that one drink will have on the percentage of alcohol in your blood can vary greatly according to a complex group of personal factors. Alcohol is absorbed from all parts of the gastrointestinal tract largely by simple diffusion into the blood.

A person who has not eaten will hit their peak blood alcohol level between 30 minutes and two hours after consumption, depending on the amount of alcohol consumed. Healthy people metabolize alcohol at a fairly consistent rate.

Alcohol is metabolized by the liver, where enzymes break down the alcohol. Understanding the rate of metabolism is critical to understanding the effects of alcohol.

  • Alcohol is metabolized at a constant rate, but some people may feel the effects of alcohol for longer amounts of time.
  • That’s because blood alcohol concentrations can vary among people and situations.

The concentration of these enzymes and their ability to metabolize alcohol vary among individuals. For example, in some people, certain genes may reduce the activity of these enzymes.

In general, the liver can process one ounce of liquor (or one standard drink) in one hour. If you consume more than this, your system becomes saturated, and the additional alcohol will accumulate in the blood and body tissues until it can be metabolized. This is why pounding shots or playing drinking games can result in high blood alcohol concentrations that last for several hours. It takes anywhere from 30 minutes to two hours after drinking the first sip of alcohol for it to get fully absorbed into our bloodstream.

As a rule of thumb, a person will eliminate one average drink or .5 oz (15 ml) of alcohol per hour. The rate of elimination tends to be higher when the blood alcohol concentration in the body is very high. Also chronic alcoholics may (depending on liver health) metabolize alcohol at a significantly higher rate than the average. Finally, the body’s ability to metabolize alcohol quickly tend to diminish with age.

Learn how gender, body weight, food and how fast you drink can affect your blood alcohol concentration. This is an interactive tool that shows you how much alcohol is in different drinks and how your BAC would compare to male and female friends. For example, a 140-pound man who drinks two alcoholic beverages in one hour will have a blood alcohol content of 0.038.

What is the rate of absorption of alcohol?

The “rate of absorption” has to do with how quickly alcohol enters the bloodstream. Alcohol absorption can be slowed by eating before or while you drink.

Alcohol and the Human Body

So if two people weigh the same, but one has more body fat, then after the same number of drinks the person with more body fat will have a higher BAC reading. With the expert help of a Virginia DUI defense attorney, you may be able use this information to fight your DUI charge.

Factors such as age, weight, gender, and amount of food eaten can affect how fast the body can process alcohol. The rate of alcohol absorption cannot be increased by sleeping or drinking water. A BAC reading can also be affected by a person’s body fat percentage. This is because fat holds much less water than muscle, and so it will absorb less alcohol from the blood.

As blood alcohol concentration increases, a person’s response to stimuli decreases markedly, speech becomes slurred, and he or she becomes unsteady and has trouble walking. With very high concentrations – greater than 0.35 grams/100 milliliters of blood (equivalent to 0.35 grams/210 liters of breath ) – a person can become comatose and die.

Biological Sex and Body Weight

He started drinking at 6pm and had 10 schooners of full strength beer (15 standard drinks) over 6 hours. After a heavy night of drinking, it can take more than 18 hours for your blood alcohol concentration to get back to zero. Alcohol is predominantly broken down by the liver, which can metabolize roughly 1 standard drink per hour for men.

How the Liver Processes Alcohol

Alcohol is metabolized at a constant rate, but some people may feel the effects of alcohol for longer amounts of time. That’s because blood alcohol concentrations can vary among people and situations.


When drinking alcohol beverages, adding water or other drinks without alcohol will dilute the alcohol in your stomach and will slow absorption. Melita is 18 and holds a P1 licence with a zero alcohol limit. She started drinking at 10pm and had 6 mixer (9 standard) drinks over 4 hours.