Ask your doctor because you don't know if you have a deficiency.
Children age 9 years and older, adults, and pregnant and breastfeeding women who take more than 4,000 IU a day of vitamin D might experience:
Nausea and vomiting.
Poor appetite and weight loss.
Constipation.
Weakness.
Confusion and disorientation.
Heart rhythm problems.
Kidney stones and kidney damage.
Dementia doctor urges all adults to take pill costing less than $1 as it could slash risk
Dr William Grant says people continue to underestimate the benefit of this vitamin supplement - and there's a cheap and easy solution to aid the public
A new study has found that taking a vitamin D supplement could reduce the occurrence of dementia by 40 percent. It's typically taken in the colder autumn and winter months when there is less sunlight, to keep bones and muscles healthy, however there are now thought to be additional benefits. Research undertaken in France has found that individuals with vitamin D levels less than 50 nmol/L were nearly three times more likely to develop Alzheimer's disease, and more than 60 percent of the population in the UK falls below these levels.
Earlier this year an additional study was published which surveyed more than 12,000 people aged 70 and above who had no experience of dementia, and it found that supplements can help reduce the risk of developing the disease. Over a third - 37 per cent - of the participants were taking vitamin D supplements and showed a 40 per cent decrease in the incidence of dementia.
Small amounts of vitamin D can be found in food sources such as oily fish, red meat, liver, egg yolks and some types of fortified foods such as breakfast cereals and fat spreads.
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