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

Companies Warned Over Potentially Dangerous Body-Building Products: FDA

Warning letters about distributing potentially harmful body-building products that contain selective androgen receptor modulators (SARMs) have been sent to a number of companies, the U.S. Food and Drug Administration says.

The products are marketed and labeled as dietary supplements, but are unapproved drugs, according to the agency.

The warning letters were sent to IronMag Labs, Panther Sports Nutrition and Infantry Labs, LLC. They have 15 working days to tell the FDA what corrective action they will take. Failure to do so could lead to enforcement action such as seizure, injunction or prosecution.

"We are extremely concerned about unscrupulous companies marketing body-building products with potentially dangerous ingredients. Body-building products that contain selective androgen receptor modulators, or SARMs, have not been approved by the FDA and are associated with serious safety concerns, including potential to increase the risk of heart attack or stroke and life threatening reactions like liver damage," Donald Ashley, director of the Office of Compliance in the FDA's Center for Drug Evaluation and Research, said in an agency news release.

"We will continue to take action against companies marketing these products to protect the public health," he added.

Consumers should stop using these body-building products immediately and see a health care professional if they have any problems that may be associated with their use, the FDA said.


Outbreak of Deadly Marburg Virus in Uganda

Uganda has declared an outbreak of deadly Marburg virus disease in the eastern part of the country.

The contagious virus is related to Ebola. As of Saturday, two confirmed cases, one probable case and two suspected cases have been reported in the Kween district, on the border with Kenya, a World Health Organization spokesman told CNN.

The confirmed and probable cases included two brothers and a sister. All three have died.

WHO is working with Ugandan health officials to contain the outbreak and has followed up with 135 people who were in contact with the patients, CNN reported.

"Marburg is a virus that is in the same family as Ebola, and it basically has very similar characteristics," according to Dr. Amesh Adalja, a spokesman for the Infectious Disease Society of America.

"So it spreads in blood and body fluids and thrives in areas in which people are not able to do effective infection control and take care of patients with appropriate personal protection equipment," Adalja told CNN.


'Potentially Irreversible' Effects of Climate Change Could Threaten Human Health Worldwide: Report

Heat waves, disease-spreading mosquitoes and weather disasters are among the many "unequivocal and potentially irreversible" effects of climate change already harming human health worldwide, a new report says.

It described climate change as a "threat multiplier" that does the greatest harm to the most vulnerable people, including those afflicted by poverty, inadequate housing, water scarcity and other serious challenges, according to the Washington Post.

The report published Monday in The Lancet medical journal was authored by 63 researchers from two dozen institutions around the world. The authors included climate scientists, ecologists, geographers, economists, engineers, mathematicians, political scientists and food, transportation and energy experts.

"We've been quite shocked and surprised by some of the results," said Nick Watts, a fellow at University College London's Institute for Global Health and executive director of the Lancet Countdown, a project studying the association between climate change and public health, the Post reported.

The researchers described a number of health threats from climate change. Between 2000 and 2016, the number of vulnerable adults exposed to heat waves increased by 125 million. In 2015, the worst year on record, 175 million people faced heat waves.

Deaths from weather disasters such as floods storms are on the rise. Each year between 2007 and 2016 had an average of 300 weather disasters, a 46 percent increase from the years 1990 to 1999. Since 1990, weather disasters have caused more than 500,000 deaths, the Post reported.

Since the 1950s, there has been a 9 percent increase in the number of people who received potentially infectious bites from the Aedes aegypti mosquito species, which spreads viruses such as Zika and dengue fever, according to The Lancet study.

It also said the number of people moving due to climate change has increased. For example, more than 3,500 Alaskan residents have been forced to relocate due to coastal erosion and melting permafrost, the Post reported.

The researchers also looked at how well the world is responding to climate change.

"The answer is, most of our indicators are headed in the wrong direction," according to Watts, the Post reported.

"Broadly, the world has not responded to climate change, and that lack of response has put lives at risk . . . The impacts we're experiencing today are already pretty bad. The things we're talking about in the future are potentially catastrophic," he said.

"If governments and the global health community do not learn from the past experiences of HIV/AIDS and the recent outbreaks of Ebola and Zika viruses, another slow response will result in an irreversible and unacceptable cost to human health," the authors of the report wrote.


Obese People and Smokers Can't Have Non-Urgent Surgery: U.K. Health Committee

A U.K. health committee's proposal to ban obese people and smokers from non-urgent surgery for an indefinite amount of time is causing controversy.

The health committee for the county of Hertfordshire says the policy is to "to support patients whose health is at risk from smoking or being very overweight," CNN reported.

These patients will not be eligible for non-urgent surgery under the National Health Service until they "improve their health."

In order to qualify for surgery, patients with a body mass index (BMI -- an estimate of body fat based on height and weight) over 40 must reduce that number by 15 percent over nine months, while those with a BMI over 30 must achieve a 10 percent reduction over that that time, CNN reported.

Smokers will have to undergo testing to prove that they've gone eight weeks or more without a cigarette.

While other areas in the U.K. have implemented similar policies, patients can eventually get surgery if they are unable to lose weight or stop smoking. That's not the case in Hertfordshire, which is why the policy is opposed by the Royal College of Surgeons and other groups.

"Singling out patients in this way goes against the principles of the NHS," said Ian Eardley, senior vice president at the Royal College of Surgeons, CNN reported.

"This goes against clinical guidance and leaves patients waiting long periods of time in pain and discomfort. It can even lead to worse outcomes following surgery in some cases," he said.

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