WEDNESDAY, Jan. 6 (HealthDay News) -- Cell phone addicts of the world, listen up: Electromagnetic waves emanating from these ubiquitous gadgets may prevent or even reverse Alzheimer's disease, researchers say.

WEDNESDAY, Jan. 6 (HealthDay News) -- A coalition of clean air advocacy groups wants the U.S. Environmental Protection Agency (EPA) to propose new standards that would reduce allowable levels of smog-causing ozone.

WEDNESDAY, Jan. 6 (HealthDay News) -- Two separate research teams report that surgery-related infections can be prevented using two different methods, one aimed at antibiotic-resistant Staphylococcus aureus growing in the nose, the other at microbes living on the skin.

WEDNESDAY, Jan. 6 (HealthDay News) -- A new type of brain scan might give doctors more insight into whether patients with memory loss are suffering from Alzheimer's disease, researchers say.

WEDNESDAY, Jan. 6 (HealthDay News) -- Children who were physically or emotionally abused or neglected are more likely to develop migraines and other chronic pain conditions as adults, a new study finds.

WEDNESDAY, Jan. 6 (HealthDay News) -- Fat mass plays an important role in building bone mass in teenage girls and having too little may increase their risk of osteoporosis later in life, new research has found.

WEDNESDAY, Jan. 6 (HealthDay News) -- Frigid temperatures can pose health risks, especially for young children, seniors and people with chronic illnesses, warns the U.S. Centers for Disease Control and Prevention.

WEDNESDAY, Jan. 6 (HealthDay News) -- New research into the genetic causes of a form of non-Hodgkin's lymphoma could lead to novel treatments, suggest researchers from the U.S. National Institutes of Health.

WEDNESDAY, Jan. 6 (HealthDay News) -- Targeting two different enzymes simultaneously may hold promise for treating people with Alzheimer's disease, researchers report.

WEDNESDAY, Jan. 6 (HealthDay News) -- New tools that use different colors of light to silence brain activity could lead to new treatments for disorders such as epilepsy, chronic pain, Parkinson's disease and brain injury, neuroscientists say.

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

WEDNESDAY, Jan. 6 (HealthDay News) -- New research indicates that the darker skin of blacks may increase their risk of heart disease and stroke because it reduces production of vitamin D, which is made during exposure to sunlight.

WEDNESDAY, Jan. 6 (HealthDay News) -- A molecular mechanism that controls energy expenditure in muscles and helps determine body weight has been identified by U.S. researchers, who said their finding could lead to a new way to treat obesity.

WEDNESDAY, Jan. 6 (HealthDay News) -- A computerized scale can help overweight kids lose weight by showing them how rapidly they eat, researchers have found.

WEDNESDAY, Jan. 6 (HealthDay News) -- A method that uses insect cell-based technology produces vaccines for swine flu faster than traditional egg-based vaccine production, say Austrian scientists.

WEDNESDAY, Jan. 6 (HealthDay News) -- Each year, thousands of Americans lose fingers, hands or entire limbs in terrible accidents. Prosthetics can help amputees regain some function, and successful hand transplants have recently been achieved.

(HealthDay News) -- Lactose intolerance is an inability to digest a type of sugar in milk called lactose. It's a common condition, affecting some 30 million adults in the United States by age 20, the National Library of Medicine says.

(HealthDay News) -- While people who have braces don't have to switch to a special diet, there are foods that can cause problems and should be avoided, the Nemours Foundation says.