Heath headlines: 20 percent of teens smoke, possible reversal of peanut allergy and doctors watch plays to learn about death?

Cigarette smoking no longer on the downslide among U.S. teens. The number of teenage smokers has stopped dwindling and remains steady at 20 percent, four percent shy of the CDC’s goal of limiting teenage smoking to only 16 percent among high schoolers. The number had been slipping for years, but seems to have leveled off.

Inactivity may be a symptom, not cause, in some childhood obesity cases. A lot people assume inactivity is the cause of many childhood obesity cases, but a new study suggests that the obesity itself causes in the inactivity, creating a lifestyle pattern than can be hard to break.

Harvard Medical School is using actors and ancient Greek plays to spark discussion about death and treating patients facing long, painful and eventually terminal illnesses. The plays are part of the school’s End of Life program and are designed to spark discussion among medical professionals and students on the ethics of treating this specific population.

New technique could help eliminate peanut allergies. Researchers successfully boosted tolerance to peanuts among kids with peanut allergies, by giving them small amounts of the nut and gradually raising the dosage over time.

25 percent of children in California, the country’s third largest state, have never been to a dentist, says a study from the journal Health Affairs. The study also shows children on Medicaid saw dentists far less than kids with private insurance.