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) -- 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 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.

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) -- 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.

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

(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.

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) -- 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.

TUESDAY, Jan. 5 (HealthDay News) -- Annual breast cancer screening should begin at age 40 for most women and start earlier -- between 25 and 30 -- for those at high risk for the disease, say new recommendations from the American College of Radiology (ACR) and the Society of Breast Imaging (SBI).

TUESDAY, Jan. 5 (HealthDay News) -- Antidepressants seem to be most effective for the people with the most severe symptoms, new research suggests.

TUESDAY, Jan. 5 (HealthDay News) -- There's been some bad news over the past couple of days for Americans battling depression.

TUESDAY, Jan. 5 (HealthDay News) -- Researchers have some good news for cocaine addicts: New findings suggest that a kind of protein could help them beat their addiction.