Be smart in the sun – or take a supplement – to increase your odds of staying healthier for longer.
Feeling the sun on your skin isn’t only good for your mood, it’s also essential for bone and muscle health – and it may even lower your risk of developing cancer.
Vitamin D is synthesized by your body when your skin is exposed to direct sunlight. However, this far north of the equator, sunlight isn’t strong enough most of the year to initiate vitamin D production.
New research published in the British Medical Journal has found a link between high vitamin D levels and a reduced risk of cancer, especially liver cancer, in a 16-year study of more than 33,000 people. After adjusting for known cancer risk factors, such as weight, activity levels and dietary factors, the researchers found that a higher level of vitamin D was associated with a 20% lower relative risk of cancer in both men and women.
In the summer, a little exposure to sunshine will help keep your D levels topped up – experts say “regularly going outside for a matter of minutes around the middle of the day without sunscreen should be enough”. The rest of the time, take a good-quality vitamin D supplement instead.
The problem is severe enough that experts advise adults to consider taking a 10microgram supplement of vitamin D daily between October and March in the winter.
If you’re not already clued-up on vitamin D supplements, here’s all the info you could possibly need on sunshine pills, as absolutely no-one calls them.
What is it?
Despite its name, vitamin D is not technically a vitamin, but actually a fat-soluble, pre-hormone compound that plays an essential role in a huge number of biological functions, including improving cognition and reducing the risk of certain cancers, cardiovascular disease and dementia. As well as being produced by your body when your skin is exposed to direct, strong sunlight, it’s is also found in low doses in certain foods, such as fish and eggs.
Do you need a vitamin D supplement?
If you live in high-latitude regions of the northern hemisphere, then the chances are that you will have some level of vitamin D deficiency. One of vitamin D’s main roles is to regulate the amount of calcium and phosphate in the body, so a severe deficiency can result in bone pain and tenderness from a condition called osteomalacia, as well as contributing to many other health issues. Supplementation can keep your levels in the ideal range to help prevent these problems, but be aware that taking high doses can deplete levels of other essential nutrients, including vitamin K.
When should you take vitamin D supplements?
The government recommendation is for all adults to consider taking vitamin D supplements from October until March, but if you’re at particular risk of a deficiency then you might need them all year round.
Who is most at risk? Well, if you don’t spend much time outdoors or tend to not expose much skin when you do go outside – favoring long sleeves and a hat, perhaps – then it’s worth weighing up the benefits of taking year-round vitamin D supplements. The government also suggests that babies and children under five take daily supplements all year round.
People with dark skin (particularly those with African, African-Caribbean and South Asian backgrounds) might also struggle to get enough vitamin D from sunlight, so they should consider taking a supplement all year round.
What are the best dietary sources of vitamin D?
Oily fish – such as salmon, sardines, and mackerel, rather than white fish like cod – bolsters its already impressive heath credentials by being a good source of vitamin D.
Other good food sources of vitamin D include red meat, liver and egg yolks. Not necessarily all at the same time, but we won’t judge you if that’s your favorite breakfast.
It’s common in some other northern hemisphere countries to find foods that are fortified in vitamin D, including cereals and spreads, and these are found on UK supermarket shelves with increasing regularity now too.
How should I take it?
You should take a vitamin D supplement after a meal that contains high-quality fat because it’s fat-soluble, which means it’s better absorbed by your body in the presence of dietary fat.
What other benefits of vitamin D are there?
A 2017 study suggested that bread and milk should be fortified with vitamin D, saying that this could stop 3.25 million a year suffering from colds and flu.
Researchers from Queen Mary University of London analyzed data from more than 11,000 participants in previous studies and found that one person in every 33 taking vitamin D supplements would be spared a respiratory tract infection (ranging from the sniffles to the flu or pneumonia) as a result.
Written by Nick Harris-Fry for Coach and legally licensed through the Matcha publisher network. Please direct all licensing questions to email@example.com.
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