Direct food additives are those that are added to a food for a specific purpose in that food. For example, xanthan gum -- used in salad dressings, chocolate milk, bakery fillings, puddings and other foods to add texture -- is a direct additive. Most direct additives are identified on the ingredient label of foods.
Physical ability tests measure the physical ability to perform a particular task or the strength of specific muscle groups, as well as strength and stamina in general; Sample job tasks (e.g., performance tests, simulations, work samples, and realistic job previews) assess performance and aptitude on particular tasks;
The potassium test may be used to help diagnose and/or monitor kidney disease, the most common cause of high blood potassium. It may also be used to evaluate for abnormal values when someone has diarrhea and vomiting, excessive sweating, or with a variety of symptoms. Blood potassium can be abnormal in many diseases. A healthcare practitioner may order this test, along with other electrolytes, to identify an electrolyte imbalance, if metabolic acidosis is suspected, or if there is high blood pressure or other symptoms of illness present.