The brains of people with cognitive decline fare better with higher levels of vitamin D, new research finds.

Diabetes diagnoses in dogs are more common in colder areas of the United States and during the winter, researchers report.

New research finds no evidence that vitamin D helps protect people against COVID-19, despite some reports from earlier in the pandemic.

New research finds no evidence that vitamin D helps protect people against COVID-19, despite some reports from earlier in the pandemic.

Higher levels of vitamin D in a child's first year may offer a shield against obesity and high blood pressure during the teen years, a new study shows.

Higher doses of vitamin D, referred to as "hypersufficiency," slows the progression of frailty in mice, a new study shows.

Vitamin D deficiency resulted in stunted growth and additional fat reserves in zebrafish, research shows.

In a new study, people with an untreated vitamin D deficiency were almost twice as likely to test positive for COVID-19 as people without a deficiency.

Certain genes tied to vitamin D production can act like an natural kind of sunscreen, researchers report.

Just the right amount of vitamin D, around 800 IU daily, can help senior citizens get back on their feet after hip fracture surgery.