In one sentence, describe what the following article is about: There are many diet plans available for those who want to use whey protein for this purpose, but in general it is recommended that you only supplement your diet with whey protein rather than replace meals with whey protein shakes. The benefit of supplementing your diet with whey protein is generally that it will help you feel more full, which may cause you to eat less, thereby encouraging weight loss.  Include whey protein in a low-calorie diet. Whey protein will work best as part of a healthy, balanced diet.   Be aware that high-protein, low-carb diets can have negative side-effects on your health.  Always aim for a healthy balance. When encouraging weight loss, you will want to include fiber and avoid too much sugar. You can achieve the inclusion of fiber with low sugar by incorporating some fruits and vegetables into your shakes. The following suggestions should help:  Add blueberries or raspberries. Both fruits are high in fiber and low in sugar. Alternatively, add spinach or cucumber. Both vegetables are high in fiber, and don't taste as strong as some other vegetables, so you can mix them into your shake without making it taste strange.  Avoid using honey, maple syrup, or sugar. These contain high amounts of sugar and will be detrimental to a diet plan. The fruit you add to a smoothie will sweeten it naturally. A protein shake can satisfy your hunger and give you energy, reducing your cravings for other foods.  One study had people drinking protein shakes before a trip to a buffet, and the people who had whey protein shakes consumed less from the buffet than others.  While it is not recommended, replacing your highest-calorie meal with a shake or smoothie should lead to the quickest weight-loss results. Replacing smaller meals with a whey protein drink will also encourage weight-loss, but at a slower pace.   Drinking a shake can also reduce post-meal blood glucose and improve insulin levels.
Summary: Determine how much whey protein to incorporate into your diet. Supplement your diet with whey protein shakes. Drink a whey protein shake or smoothie before a meal.

In one sentence, describe what the following article is about: If your family doctor thinks you have a restrictive lung disease, they will refer you to a respiratory (lung) specialist, also known as a pulmonologist, for further testing. The pulmonologist may conduct a helium dilution test. This inert gas dilution method uses helium to directly identify your residual lung volume. To start the test, you'll exhale normally and then be connected to a closed system containing known volumes of helium and oxygen. Once connected, you breathe in the helium and the amount exhaled is measured. The difference between the two volumes of helium is a pretty accurate estimate of your residual lung volume.  Helium is an inert, colorless, odorless, tasteless gas and is non-toxic to your lungs, so there are no health concerns related to this exam. This technique may underestimate residual lung volume because it measures only the lung volume that communicates with the airways. This can be problematic for patients with severe airflow limitation. You will also need a referral to a pulmonologist to have this test done, which measures the air remaining in your conducting airways. To start the test, you'll exhale normally and then be connected to a spirometer that contains 100% oxygen. You'll then breath in deeply and exhale as strongly as you can, and the spirometer will measure the amount of exhaled nitrogen compared to the entire volume of exhaled air. The halfway point of the percentage of exhaled nitrogen allows the doctor to figure out the amount of gas you expelled, which is equal to the residual lung volume.  Recall that the air we normally breathe in is about 21% oxygen and 78% nitrogen. This test forces you to breathe 100% oxygen and then measures the amount of nitrogen exhaled, a predetermined percentage of which represents residual lung volume. Like the helium dilution technique, nitrogen washout can also underestimate residual lung volume in patients with severely restricted airflow. This very accurate method for measuring residual lung volume uses a plethysmograph, which is an enclosed instrument (a small chamber you sit in) used for recording an organ’s volume change. Once inside an airtight plethysmograph — it sort of looks like a small phone booth — you'll be asked to normally exhale, then inhale against a closed mouthpiece. As your chest wall expands, the pressure within the plethysmograph rises, which is calculated. Then you'll exhale as hard as you can out through the mouthpiece. The difference in pressures represent your residual lung volume.  Body plethysmography uses Boyle's gas law (pressure and volume of a gas have an inverse relationship when temperature is constant) to determine residual lung volume and other lung volumes. Body plethysmography is considered more accurate than gas dilution methods for calculating lung volumes, particularly if the lung is obstructed.
Summary:
Get a referral to a medical specialist who can conduct a helium dilution test. Consider the nitrogen washout technique. Have a body plethysmography done for best accuracy.