Vitamin D is crucial for bone health and immunity, obtainable through sunlight and diet. Supplements, however, can lead to ...

For example, 3,000 IU of vitamin A (as retinol) is 900 mcg RAE. About 18,000 IU beta carotene, which is less potent than ...

Side effects from taking too much vitamin B6—including nerve damage—may be more widespread than we think, Australia's ...

Learn about normal vitamin D levels by age. This article also looks at sources of vitamin D, symptoms of vitamin D toxicity, and more.

Multiple children in West Texas have been treated for vitamin A toxicity stemming from at-home attempts to treat measles, hospital officials have confirmed. Covenant Children's Hospital declined ...

That said, vitamin D is still important for cats and dogs – particularly because they can’t get it from the sun in the same way we do.

Several factors can cause a person to have classic signs of dementia, including a deficiency in vitamin B12.

As a measles outbreak spreads across the United States, doctors are now seeing a new and unexpected danger: children getting sick from taking too much vitamin A.

“Normal" levels of vitamin B12 may not be enough to ward off dementia, according to researchers at University of California San Francisco. A neurosurgeon comments on the findings.

Vitamin A can be toxic Using vitamin A is a major talking point for anti-vaccine advocates, who champion supplements as a protective measure, despite evidence to the contrary.

According to Dr. Scott Miller, the resident vet with premium nutrition-led dog food brand Barking Heads, vitamin D3, or cholecalciferol, is toxic to pets – something that left us surprised.