If you find yourself feeling groggy, confused or feel like you have a lack of mental clarity, you could be suffering from brain fog. Brain fog may also be related to your metabolism.

Obesity is becoming more prevalent in the United States. According to the National Institute of Diabetes Digestive and Kidney Diseases, 66 percent of Americans are either overweight or obese. These terms carry different stipulations, but both are considered unhealthy.

Your weight is a good indicator of your health. If you maintain a healthy weight throughout most of your life, you may be able to reduce your risk of a chronic illness such as heart disease. Body mass index, or BMI, is a tool that helps determine health risk based on a calculation using your height and weight.

Having enough subcutaneous fat to "pinch an inch" might not have the health risks of deep-abdominal visceral fat, but it can still get in the way of achieving a very lean and toned physique.

Liposuction is a cosmetic surgical procedure that removes fat from selected body areas. It is commonly performed on the abdomen, thighs, arms, buttocks and hips. Although liposuction is not a weight-loss solution, it is an option to remove centralized fat that is unresponsive to diet and exercise.

Acetylcholine is an excitatory neurotransmitter that conducts electrical impulses through a series of actions, making it possible for nerve cells to communicate with muscle cells and generate muscle contractions.

Bodybuilders cannot use normal height-to-weight ratio charts because they are designed for people with less muscle mass.

As a 25-year-old woman, your concerns with weight may be more about aesthetics than your health. But you might be surprised to learn that a healthy weight is not one that requires a starvation diet. A couple of methods are available that you can use to determine your healthy weight, based on your height.

Although it's more common in the United States to have too much body fat than too little, make sure you don't go too far in your weight-loss efforts. If your body fat drops too low, it can have health consequences, just as when your body fat is too high.

Body mass index is the ratio of your weight in kilograms divided by your height in meters squared. BMI provides an estimation of your body fat level, but is in no way diagnostic. It helps healthcare providers evaluate whether you may be at risk of chronic disease due to carrying excess fat.

Teenagers develop at different rates and can have widely differing heights by the age of 18, so you won't find an ideal weight for every 18-year-old. It's possible, however, to determine a range of healthy weights for those at this age based on height and gender.

Powerlifting, a strength sport where you compete in the squat, bench press and deadlift, allows you to build muscle and burn fat. Powerlifting, like other forms of heavy resistance training, strengthens your skeleton and reduces your risk of injury in other sports and activities.