Children and teenagers -- mostly girls -- need zinc, a mineral important for maintaining healthy immune systems and healthy skin and for preventing colds and infections. Yet half of all teenage girls have zinc deficiencies.

Red meat is the most effective way of channeling zinc into the body. Perhaps these young girls are eating red meat less than two times per week -- a practice research shows can contribute to zinc deficiencies.

Iron is vital for good health. Menstruating women need it. The elderly need it. Pregnant women need it. And children need it too. But many lack healthy levels of iron.

Red meat contains a lot of iron. And while iron also comes from vegetable sources, meat contains more iron than most foods and is best utilized by the body in this form.

Red meat also contains B vitamins, phosphorus, potassium, magnesium, selenium -- and protein, critical for muscle and organ health. Protein from red meat is complete, meaning it contains all the amino acids the body cannot make on its own. Protein helps the body repair and renew.

There is definitely a good side to eating red meat. There is also a bad side.

Red meat has been linked to incidences of bowel cancer, breast cancer, heart disease, Alzheimer's disease, osteoporosis, arthritis, high cholesterol, clogged arteries, and food poisoning.

Experts say the controversy surrounding red meat comes down to the type of meat we are eating -- and how we are eating it.

There are three official red meats -- pork, lamb, and beef. Pork is the leanest, lamb is the fattiest, and beef is the most nutritious. Red meat is typically high in saturated fats and bad cholesterol. But lean beef is fairly healthy -- if it's not treated with hormones and is truly free from excess fat. The more white you see, the more fat you get.

So here is the trick for all meat-eaters out there -- choose lean meats, seek nutritious cuts of meat, avoid hormone-treated products, steer clear of processed meats (these include more additives and fats than simple cuts of pork, lamb, and beef), read labels carefully, make meat just one component of a balanced diet, and brace yourself for more research and study and discussion that will undoubtedly conclude that meat is good for us. And bad for us too.

Quick autopsies -- or rapid organ donation -- may steer scientists in the direction of better diagnosing and treating the most lethal of cancers. Some 33,700 Americans will be diagnosed with pancreatic cancer this year -- and 32,300 will die. There is no early detection test for this disease and early symptoms are vague and may be mistaken for health concerns like indigestion. By the time the classic symptoms -- jaundice and itching -- surface, the cancer has typically spread and patients have only months to live. Rapid autopsies have been used before -- for Alzheimer's and prostate cancer -- but this a first in the study of pancreatic cancer and it just may lead to the discovery of what makes this cancer so aggressive and so deadly.