The progression of Alzheimer's disease may accelerate as iron deposits build up in the brain, a new study finds, hinting at a possible role for the mineral in mental decline.
Using MRI scans of 200 older adults with and without Alzheimer's, researchers found that those with the disease generally had higher iron levels in various parts of the brain. And 17 months later, Alzheimer's pat...
Teens who donate blood are at significant risk for long-term iron deficiency, a new study warns.
The concern comes as 16- to 18-year-olds have emerged as one of the fastest-growing groups of blood donors nationwide. But this study of nearly 31,000 teens who gave blood more than once between 2016 and 2018 found that roughly one in 10 were already iron-deficient when they donated for t...
There's been much speculation about whether vitamin D might prevent or help survival with COVID-19, and two new studies appear to underscore the link.
In the first study -- published in the journal Aging Clinical and Experimental Research -- British researchers found that COVID-19 infections and deaths were higher in countries where people had low vitamin D levels, such as Ita...
Indoor athletes may be vitamin D-deficient, putting themselves at risk of injury and poor performance, a small study finds.
Researchers assessed vitamin D levels in players on George Mason University's men's and women's basketball teams. For the 2018-2019 season, players were given a supplement with a high dose, low dose or no vitamin D.
Taking higher doses of vitamin D during pregnancy doesn't appear to offer any protection against asthma in children, a new study finds.
The study, a follow-up to one done three years ago, looked at 6-year-old children whose mothers had taken extra vitamin D while they were pregnant. The hope was that taking extra vitamin D when the baby's lungs are developing during pregnancy might p...
Many Americans believe they are likely to develop dementia -- and they often turn to unproven ways to try to better their odds, a new study suggests.
In a survey, researchers found that almost half of Americans in their 50s and 60s believed they were at least "somewhat likely" to develop dementia. Yet few -- 5% -- said they had talked to their doctor about ways to lower their risk...
Young and middle-aged adults with low vitamin D levels may live shorter lives, a large study suggests.
The findings come from a 20-year follow-up of more than 78,000 Austrian adults. Researchers found that those with low vitamin D levels in their blood were nearly three times more likely to die during the study period than those with adequate levels.
Vitamin D plays an important role in overall health, but if you've been taking supplements to strengthen your heart, recent research may disappoint you.
Although vitamin D is best known for its role in developing strong bones, low blood levels have been linked to an increased risk of heart attacks and strokes. But recent studies found vitamin D supplements did not bolster heart healt...
Low vitamin D levels do not lead to strokes but can result from them, according to the latest study that looks at the relationship between the two.
Vitamin D is mostly known for helping the body absorb calcium and contributing to bone health. But research in recent decades also has looked at whether vitamin D levels affect cardiovascular disease, although with inconsistent results.
Wondering if you can do more than slap on some sunscreen to prevent skin cancer? A new study suggests that getting more vitamin A may help.
The study of around 125,000 Americans found that people with the highest intake of vitamin A lowered their risk of squamous cell skin cancer by around 15%. Most of the vitamin A they consumed came from foods.
Kids whose moms don't get enough sunshine during pregnancy may be more likely to develop learning difficulties, researchers report.
The finding stems from data on more than 422,000 school-aged children in Scotland. Low levels of exposure to UVB rays -- but not UVA sunlight -- during the entire pregnancy was linked to learning disabilities later on.
If you're looking to improve your heart health, getting regular exercise and eating healthy foods can definitely help, but new research says popping a daily vitamin D supplement won't.
The research -- a meta-analysis of 21 randomized clinical trials involving more than 83,000 people -- found no decrease in major cardiovascular events in people taking vitamin D supplements. There was ...
Vitamin supplements don't appear to prevent type 2 diabetes in those at highest risk for the disease, a new study finds.
Some studies have suggested that low vitamin D levels might increase the odds of developing diabetes and that boosting levels could prevent it, but these findings throw cold water on these assumptions.
In this study funded by the U.S. National Institutes...
From positive effects on cholesterol levels to reducing the risk of heart disease and even some cancers, nuts are good for you.
Ounce for ounce, they are nutrient powerhouses with beneficial fats and plant protein. Many studies recommend eating 1-1/2 ounces of nuts a day, but which are best? High levels of nutrients put these at the top of the list.
Americans are making shifts in the supplements they take -- fewer multivitamins and vitamins C and E, more fish oil and vitamin D. Many think of supplements as magic bullets, but studies don't always support their supposed benefits.
Some research is positive. Vitamin D is important for good health and very hard to get naturally from foods or, if you live in northern latitudes, from th...
The guidelines to eat more vegetables are clear, and eating a rainbow of colors gets you the widest variety of nutrients and phyto-nutrients, those hard-to-duplicate compounds that go beyond vitamins and minerals.
But whether you're at the farmers' market or choosing a side dish at a restaurant, are some vegetables better than others?
In the ABCs of vitamins, B12 is often overlooked. But it's essential for the making of nerve and red blood cells, as well as DNA along with many other body processes. Adults and teens need just 2.4 micrograms a day, but you can fall short even on this small amount.
You're at particular risk of a B12 deficiency if you're a vegetarian because animal foods, like meat and dairy, are the o...
If you're popping dietary supplements in the hope of living longer, a large new study suggests you'd be better off investing that money in nutritious foods.
The research found that vitamins A and K, magnesium, zinc and copper were linked to a lower risk of death from heart disease or stroke, and an overall lower risk of dying during the average six years of follow-up. But these findi...
The U.S. Food and Drug Administration plans to strengthen regulation of dietary supplements, such as vitamins, minerals and herbs, the agency announced Monday.
The changes would be "one of the most significant modernizations of dietary supplement regulation and oversight in more than 25 years," FDA Commissioner Dr. Scott Gottlieb said in an agency news release.
Deadly lung attacks may be averted in some COPD patients with a daily dose of vitamin D, new research suggests.
Chronic obstructive pulmonary disease, or COPD, includes a number of lung conditions, including emphysema and chronic bronchitis. Nearly all COPD deaths are due to a sudden worsening of symptoms (lung attacks), often triggered by viral upper respiratory infections, the resea...
You'd think vitamin deficiencies would be rare in the United States, but many people are running low on vitamin D, and it's a serious health threat.
Being short on vitamin D not only affects bone density, it's also been linked to conditions such as heart disease, mental decline, some types of cancer, autoimmune diseases, infectious diseases and type 2 diabe...
Eight brands of dry dog food have been recalled because of potentially deadly amounts of vitamin D, the U.S. Food and Drug Administration says.
Vitamin D is an important nutrient for dogs. But too much can cause symptoms such as vomiting, appetite loss, increased thirst and urination, excessive drooling and weight loss. Toxic levels of the vitamin can lead to kidney failure and death....
U.S. health officials have issued more than 700 warnings during the last decade about the sale of dietary supplements that contain unapproved and potentially dangerous drug ingredients, new research reveals.
In nearly all cases (98 percent), the presence of such ingredients was not noted anywhere on supplement labeling, the U.S. Food and Drug Administration found.
Women whose final stages of pregnancy occur during the short, dark days of winter may be at increased risk for postpartum depression, a new study suggests.
It has to do with reduced exposure to sunlight -- the same culprit that contributes to seasonal affective disorder, or SAD. That's a type of depression that usually starts in fall and winter and disappears in spring and summer.