The body produces too much histamine when it has an allergic reaction. An allergic reaction is an overreaction of the immune system to certain substances that do not affect most people, according to HealthMad.

Proteins, fats and carbohydrates provide the calories your body needs for energy, and a healthy diet contains all three. The trick is to find the right balance and to know which foods contain which source of calories.

Protein builds the muscles and tissues that help your body run. It also plays a critical role in fighting infections and carrying oxygen throughout your body.

Whether you are a vegetarian or not, soy is an excellent source of protein. Soy protein powder is made by the separating the soy protein from the soybeans, leaving the powder "nearly carbohydrate and fat-free," and containing up to 95 percent protein, says the Soy Foods Association of North America.

Any successful weight-loss routine means watching your calorie intake and getting regular exercise, but a protein-rich diet is also beneficial. Protein makes you feel full longer, keeps levels of blood sugar steady and temporarily boosts your metabolism more than carbs or fats.

Protein synthesis means maintaining proper nutrition so that muscles can use dietary amino acids and the proteins to rebuild and repair themselves. Supplements with an anabolic or building effect on muscles increase protein synthesis.

Whey protein comes from cow’s milk. The process of cow's milk being turned into cheese creates whey protein as a byproduct. Whey protein is a complete and high quality protein, with all the essential amino acids. Whey protein is a natural food substance, but is not 100 percent risk-free.

Increasing your protein intake while trying to lose weight may help you feel fuller and keep your blood sugar levels stable, thus reducing cravings. Losing weight also requires you to watch your calorie and fat intake.

Hyperkalemia, or excess potassium in the blood, is a potentially fatal medical condition. Normal blood potassium levels range from 3.6 to 4.8 mEq/L. Blood potassium levels above 6.0 mEq/L are dangerous and merit immediate medical attention, according to MayoClinic.com.

According to Natural News, because hair is made up of protein, fat, water and carbohydrates, a protein deficiency may cause weak hair or hair loss. This can be especially true for vegetarians. Adding protein to your diet may help to enrich the health of your hair.

Protein shakes refer to some form of protein powder combined with a liquid and often other ingredients, then blended into a drink and consumed after a workout or as a meal replacement. Traditionally a drink for bodybuilders, protein shakes have become popular with all types of people to enhance exercise and diet goals.

Protein is a macronutrient, an essential nutrient required in relatively large amounts for human health. Protein is found in nearly all foods, including meats, poultry, fish, dairy products, starches and grains, vegetables, soy foods, nuts, beans, and some whole grains.