Gamma-aminobutyric acid, commonly called GABA, is an amino acid derivative that sends calming signals to your brain. At the time of publication, GABA is under study for use in the treatment of nerve disorders such as epilepsy and anxiety. Bodybuilders also use it to increase muscle growth.

Fun nights spent drinking with your friends can plague you the next day in the form of a hangover. A hangover is a sickness caused by drinking alcohol. You can get a hangover from drinking just one alcoholic beverage or several. Alcohol increases urination, which increases potassium excretion and causes dehydration.

Apple cider vinegar is helpful as a home staple. It can be used in cooking and cleaning, and some people use it as a home remedy for medical issues. According to "Dr. Earl Mindell's Amazing Apple Cider Vinegar" by Earl Mindell, M.D., apple cider vinegar can even offer benefits to women going through menopause.

Eating more foods with vitamin C increases the antioxidant protection you receive from your daily diet. Vitamin C, also known as ascorbic acid, bolsters your immune system while also supporting collagen production for healthy skin and joints. The nutrient additionally helps your body absorb iron.

Papaya is a nutritious fruit grown in tropical regions. Papaya is rich in antioxidants and a good source of various vitamins and minerals. Papaya also contains a proteolytic enzyme called papain, which accelerates the digestion or breakdown of protein into amino acids.

An iron deficiency is the No. 1 nutritional disorder in the world, and teenagers are at a particular risk for developing it.

Iron deficiency and anemia are two pieces of a condition that often affects teenagers: fatigue. Teens may be tired for other reasons, such as staying up late to do homework or to study for tests, extracurricular activities or trying to manage a job plus school, but anemia from iron deficiency can make things worse.

Facial redness can cause shyness or embarrassment, since it's hard to hide. Chronic facial redness may become even more socially debilitating.

Human growth hormone, or somatotropin, increases when you fast. Under normal circumstances, HGH promotes the synthesis of lean muscle and the storage of glycogen as well as fat.

Vitamin D is not actually a vitamin, but a hormone. It is created when your skin is exposed to the sun, and it maintains calcium levels and proper bone formation. MayoClinic.com states that it may help treat osteoporosis, cancer and even high blood pressure. Many people supplement with it for these reasons.

Vitamin E is a fat-soluble vitamin, which means your body stores it in fat tissues and uses it to produce red blood cells and activate vitamin K, which is necessary for blood clotting.

Multivitamins provide a safe dosage of several vitamins for individuals looking to pump extra nutrients into their body alongside those obtained through a standard diet. Most multivitamins contain vitamin C, which plays a vital role in maintaining your body's basic functions.