The dangers of low levels of vitamin D for women who cover up for cultural and religious reasons are well known.
Sunlight is the best source of vitamin D, which is generated in the skin and vital for helping our bodies to absorb the calcium in our diets that we need for healthy teeth, bones and muscles. Yet despite the excessive amounts of sunlight in the Middle East, the incidence of bone disease in the region among female adults and the children born to them are disproportionately high.
But now a new study in the UK has found that, in addition to potentially exposing many babies to the risk of rickets – a softening and distortion of the bones all but consigned to medical history in the West, but still prevalent in the Middle East – vitamin D deficiency in pregnant women can also have an impact on the social development and motor skills of pre-school age children.
Nutritional and child health experts at the universities of Bristol and Surrey looked at the impact of maternal vitamin D levels in 7,065 pairs of mothers and children. Part of a long-term study tracking the development of more than 13,000 babies born in the southwest of England, it is one of the biggest research projects of its kind ever conducted.
Before this study, published in the British Journal of Nutrition last month, it was already known that a diet during pregnancy of oily fish, which is high in vitamin D, was “positively associated with childhood cognitive outcomes”.
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Previous studies, however, had attributed the brain-boosting benefits to the omega-3 fatty acids found in the fish. But the new research, triggered by animal experiments that have shown an association between vitamin D deficiency and abnormal brain development in rats, set out to explore the possibility that vitamin D was the magic ingredient.
Only five previous studies have explored this possibility in humans and the results were inconclusive and inconsistent.
The new research focused on mother-child pairs in the Avon Longitudinal Study of Parents and Children, in which the mother had had her vitamin D levels measured during pregnancy and the child had had at least one neuro-developmental outcome assessed between the age of six months and nine years. These outcomes included motor development (the changes in a way a child controls its movements), communication and social skills, behaviour, cognition (the extent to which it understands the world around it) and reading ability.
There was no evidence of a long-term effect on reading skills. But the researchers conclude that children born to mothers deficient in vitamin D during pregnancy – defined by a blood test showing a concentration of less than 50 nanomoles per litre of the pre-hormone Calcifediol, also known as 25(OH)D – are “more likely to have sub-optimal gross-motor skills at 30 months, sub-optimal fine-motor skills at 30 months and sub-optimal social development scores at 42 months” than children born to mothers with sufficient vitamin D levels.
Quite why this is so remains uncertain, but the link is now clear – when the mother-child pairs were divided into three groups, the greatest effects were seen in children of mothers with the lowest levels of vitamin D during pregnancy.
Despite the benefits of oily fish, it is extremely hard to source sufficient vitamin D from diet alone. The conclusion, say the authors of the new research, is that wherever they live, pregnant women should follow the latest advice from the UK’s Scientific Advisory Commission on Nutrition and take a supplement of 10 micrograms (or 400 IU) of vitamin D a day. This advice, says lead author Dr Andrea Darling, a nutritionist at the University of Surrey, applies especially to women who cover their skin for religious or cultural reasons, even if they live in hot countries, such as the UAE.
“There is evidence that skin coverage, which blocks sunlight to the skin, is associated with poorer vitamin D status, and we know that women in the Middle East are at high risk of vitamin D deficiency,” she said. “Extrapolating from our findings, they would theoretically be at risk of developmental consequences of this in their offspring.”
A study carried out in 2014 by nutritionists at Istanbul Medipol University measured vitamin D levels in 100 female students, 40 per cent of whom wore “Muslim-style clothing”, which covered the whole body but left the face and hands exposed. They found low levels of vitamin D in 20 per cent of the uncovered students, but in 55 per cent of those who wore traditional clothing. “Vitamin D levels in young women,” the authors concluded in a paper published in the journal Nutritional Research, “are associated with clothing style, and the age at which a female begins wearing Muslim style clothing is related”.
Middle Eastern men, says Darling, are also at high risk of vitamin D deficiency, "as the issue is not just of skin coverage but also of sun avoidance, due to the extreme heat”. But there is overwhelming evidence that it is women and their offspring who are most at risk.
A major study carried out in Saudi Arabia and published in the journal Archives of Osteoporosis in 2014 looked at 10,700 patients and found more than 83 per cent were deficient in vitamin D. Over a third of women were suffering from severe deficiency, compared with under a quarter of men.
This, concluded the authors from the King Faisal Specialist Hospital and Research Centre in Riyadh, was “a major public health concern and requires a robust health policy”, including preventive screening for vitamin D, especially among young women and children.
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How to protect yourself when air quality drops
Install an air filter in your home.
Close your windows and turn on the AC.
Shower or bath after being outside.
Wear a face mask.
Stay indoors when conditions are particularly poor.
If driving, turn your engine off when stationary.
How Apple's credit card works
The Apple Card looks different from a traditional credit card — there's no number on the front and the users' name is etched in metal. The card expands the company's digital Apple Pay services, marrying the physical card to a virtual one and integrating both with the iPhone. Its attributes include quick sign-up, elimination of most fees, strong security protections and cash back.
What does it cost?
Apple says there are no fees associated with the card. That means no late fee, no annual fee, no international fee and no over-the-limit fees. It also said it aims to have among the lowest interest rates in the industry. Users must have an iPhone to use the card, which comes at a cost. But they will earn cash back on their purchases — 3 per cent on Apple purchases, 2 per cent on those with the virtual card and 1 per cent with the physical card. Apple says it is the only card to provide those rewards in real time, so that cash earned can be used immediately.
What will the interest rate be?
The card doesn't come out until summer but Apple has said that as of March, the variable annual percentage rate on the card could be anywhere from 13.24 per cent to 24.24 per cent based on creditworthiness. That's in line with the rest of the market, according to analysts
What about security?
The physical card has no numbers so purchases are made with the embedded chip and the digital version lives in your Apple Wallet on your phone, where it's protected by fingerprints or facial recognition. That means that even if someone steals your phone, they won't be able to use the card to buy things.
Is it easy to use?
Apple says users will be able to sign up for the card in the Wallet app on their iPhone and begin using it almost immediately. It also tracks spending on the phone in a more user-friendly format, eliminating some of the gibberish that fills a traditional credit card statement. Plus it includes some budgeting tools, such as tracking spending and providing estimates of how much interest could be charged on a purchase to help people make an informed decision.
* Associated Press
The struggle is on for active managers
David Einhorn closed out 2018 with his biggest annual loss ever for the 22-year-old Greenlight Capital.
The firm’s main hedge fund fell 9 per cent in December, extending this year’s decline to 34 percent, according to an investor update viewed by Bloomberg.
Greenlight posted some of the industry’s best returns in its early years, but has stumbled since losing more than 20 per cent in 2015.
Other value-investing managers have also struggled, as a decade of historically low interest rates and the rise of passive investing and quant trading pushed growth stocks past their inexpensive brethren. Three Bays Capital and SPO Partners & Co., which sought to make wagers on undervalued stocks, closed in 2018. Mr Einhorn has repeatedly expressed his frustration with the poor performance this year, while remaining steadfast in his commitment to value investing.
Greenlight, which posted gains only in May and October, underperformed both the broader market and its peers in 2018. The S&P 500 Index dropped 4.4 per cent, including dividends, while the HFRX Global Hedge Fund Index, an early indicator of industry performance, fell 7 per cent through December. 28.
At the start of the year, Greenlight managed $6.3 billion in assets, according to a regulatory filing. By May, the firm was down to $5.5bn.
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Started: August 2020
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Sectors: Internet, e-commerce
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