The consultant had deleted records involving McKinsey’s role in pushing OxyContin sales and driving the opioid crisis.

The report echoes many of Health Secretary Robert F. Kennedy Jr.’s talking points on ultraprocessed foods and vaccines, but with some notable omissions.

The report is already receiving pushback from some Republicans and the agriculture industry over fears about the health secretary’s longtime crusade against agricultural chemicals.

Robert F. Kennedy Jr. wants to return the nation to a time when he believes Americans were healthier. Not so fast, many researchers say.

More than half of the National Science Foundation grants terminated since April fund programs that would help students train in science, engineering and math.

They contain increasing amounts of sugar, fat and sodium and decreasing amounts of protein and fiber.

The test may make it easier to identify whether people with memory and thinking problems have Alzheimer’s or not.

An inquiry accused Nestlé and French officials of hiding the company’s practice of filtering Perrier water it labels “natural.” The head of Nestlé has suggested that human activity is making pure water scarcer.

Run by teenagers, for teenagers, the Green Crew helps students get their hands dirty with projects like tree planting, trail restoration and invasive species removal.

Former President Joseph R. Biden Jr.’s office pushed back on speculation that there had been a coverup around the illness.

Nearly 100 neurology experts collaborated on the creation of a new method of evaluating patients with traumatic brain injuries.

Guidelines advise no screening after age 70, and doctors say that even men who test diligently may develop an aggressive cancer after none was found at a recent checkup.

Agency leaders said there was evidence to justify approval only for older people and those with medical conditions. Many others may not be able to get the shots.

Researchers studied data from a million people and found evidence that a height gene shared by both sexes is amplified in men.

Here’s how to protect your skin and the environment this summer.

The administration is not only allowing more greenhouse gases. It is undermining the nation’s ability to understand and respond to a hotter planet.

The cancer has metastasized to the bone, according to a statement from Mr. Biden’s personal office.

Chronic sleep deprivation affects nearly half of South African workers, costing companies more than just sick days.