Vitamin D

Vitamin D is a nutrient that the body needs in small amounts to function and stay healthy. Vitamin D helps the body use calcium and phosphorus to make strong bones and teeth. It is fat-soluble (can dissolve in fats and oils) and is found in fatty fish, egg yolks, and dairy products. Skin exposed to sunshine can also make vitamin D. Not enough vitamin D can cause a bone disease called rickets. It is being studied in the prevention and treatment of some types of cancer. Also called cholecalciferol.

What is Vitamin D?

Vitamin D is a fat-soluble vitamin that is important for strong bones, muscles, and general good health.

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Latest Vitamin D News and Research

Scientists reveal how prolonged UV exposure weakens cellular defense against skin cancer

Sunlight is vital for human health as it helps the body produce essential nutrients, such as vitamin D. However, too much sun exposure can significantly increase the risk of skin cancer.

13 Nov 2025

Which plant-based diet is healthiest and most sustainable

Vegan and vegetarian diets deliver nutrient adequacy on par with Mediterranean diets, while lowering carbon footprints and promoting environmental health.

13 Nov 2025

What makes truffles more than a delicacy? They’re packed with bioactive compounds

Italian researchers reviewed the chemical composition and biological potential of truffles, identifying them as rich sources of antioxidants, polysaccharides, sterols, and vitamins. The review highlights their promise as functional foods and natural therapeutics, while emphasizing the need for sustainable cultivation and clinical validation.

11 Nov 2025

Tailored vitamin D regimens offer significant cardiac benefit

Adults with heart disease who had a previous heart attack and took vitamin D doses tailored to reach optimal blood levels reduced their risk of another heart attack by more than half compared to those who did not have their vitamin D blood levels optimized, according to a preliminary study to be presented at the American Heart Association's Scientific Sessions 2025.

11 Nov 2025

Tailored vitamin D3 supplementation lowers risk of heart attack recurrence

A tailored approach of vitamin D3 supplementation in patients who have suffered a heart attack significantly reduces their risk of a second heart attack, a new study from heart researchers at Intermountain Health in Salt Lake City finds.

10 Nov 2025

Do dietary supplements really improve muscle health in non-athletes?

Dietary supplements can support muscle health, but their effectiveness varies. This review explores their role in physical activity and age-related muscle loss.

10 Nov 2025

New study highlights the impact of pediatric integrative medicine services

A new study conducted by University Hospitals Connor Whole Health highlights the impact of pediatric integrative medicine services.

5 Nov 2025

First-of-its-kind resource created to identify people with genetic risk for elevated 'bad' cholesterol

An international team led by a University of Pittsburgh School of Medicine scientist has created a first-of-its-kind resource to identify those with a genetic risk for elevated 'bad' cholesterol -- a major contributor to heart disease.

30 Oct 2025

Study finds clear link between osteomalacia and increased risk of complicated deliveries

A research team at Uppsala University has identified a clear link between osteomalacia – a form of bone softening commonly caused by vitamin D deficiency – and a fivefold increased risk of emergency cesarean sections or the need for vacuum-assisted delivery.

28 Oct 2025

Decline in vitamin D levels observed during the Covid-19 pandemic

Routine data from laboratories reveal a decline in vitamin D levels during the Covid-19 pandemic, especially in older women and urban dwellers.

21 Oct 2025

Heavy drinking fuels Alzheimer’s disease by igniting brain inflammation and protein damage

Chronic alcohol use accelerates Alzheimer’s disease (AD) progression by intensifying oxidative stress, neuroinflammation, and amyloid-tau pathology through shared molecular pathways. The review highlights emerging therapies, targeting TLR4, GSK-3β, and metabolic dysfunction, that may mitigate alcohol-induced neurodegeneration.

20 Oct 2025

$Yogurt’s impact on bone health falls short of fracture protection, review finds$

Yogurt’s impact on bone health falls short of fracture protection, review finds

This systematic review and meta-analysis found that while yogurt consumption shows a modest positive association with bone health markers, its effect on bone mineral density and fracture prevention in adults is clinically negligible. Current evidence is based solely on observational studies, with low certainty and limited characterization of yogurt products.

19 Oct 2025

ALS and MS share striking geographic patterns, research shows

A new study published in Nature's Scientific Reports indicates that amyotrophic lateral sclerosis (ALS) and multiple sclerosis (MS) have an extremely high geographic association, even after controlling for race, gender, wealth, latitude, and access to neurological healthcare.

15 Oct 2025

Why brittle bones aren’t just a woman’s problem

Ronald Klein was biking around his neighborhood in North Wales, Pennsylvania, in 2006 and tried to jump a curb. "But I was going too slow — I didn't have enough momentum," he recalled.

14 Oct 2025

Does yogurt strengthen your bones?

Researchers review the impact of yogurt consumption on bone health in healthy adults.

3 Oct 2025

Can nut-based milks match dairy for safety, nutrition and flavor?

Tree nut-based beverages offer healthy fats but lack protein. Innovations in fortification and fermentation could enhance their nutritional value.

3 Oct 2025

Red meat in healthy diet linked to better brain nutrients and gut diversity

A study of 3,600+ participants reveals red meat in high-HEI diets enhances brain-supporting nutrients without disrupting gut health or mental well-being.

2 Oct 2025

Early-life dietary habits linked to elevated asthma risk among children

Childhood asthma, a chronic inflammatory condition affecting millions worldwide, may be shaped not only by genetics and environment but also by what children prefer to eat.

30 Sep 2025

Consumption of ultra-processed foods may exacerbate disease activity in early multiple sclerosis

Higher intake of ultra-processed foods (UPFs) may exacerbate disease activity in early multiple sclerosis (MS), according to new research presented at the 41st Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS 2025).

24 Sep 2025

Vitamin D and multivitamins in pregnancy may be linked to lower ADHD and ASD traits

Maternal intake of vitamin D and multivitamins during pregnancy may lower ADHD and autism traits in children, emphasizing the role of nutrition in development.

19 Sep 2025