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4 reviews
In a large US nutrition survey, 45 out of 100 people got less magnesium than the average requirement, even counting supplements
That's the result of the national NHANES survey for 2003–2006, where 16,110 people reported what they usually eat and which supplements they take. The Institute of Medicine (IOM) defines the average requirement as the amount of magnesium that is enough for half of people, so this is a modest bar. In the fall, as the days get shorter, a lot of people say they run out of energy by evening. Below we look at why your body needs magnesium, how much you need, why a blood test says little about how much you have stored, and how the forms of magnesium in tablets differ.
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In Russia, 62 in 100 adults tested in the fall had low vitamin D. In the spring, 84 did
This is the result of Russia's first vitamin D registry, a large collection of blood tests done under one set of rules. In 2020, 996 volunteers aged 18 to 50 from ten regions of the country gave blood, some in the fall and some in the spring. Low meant a level under 30 nanograms per milliliter (ng/mL), as in the 2015 guidelines of the Russian Association of Endocrinologists. It is fall again now, the days are getting shorter, and winter is ahead. Below we look at why vitamin D in blood tests is lowest at the end of winter and in spring, why your body needs it, how much you need, and what is known about its usual companions, K2 and magnesium.
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Does a “big dose” of vitamin C help once a cold has already started?
This was tested in trials where some people got vitamin C and others got a placebo. Their results were pulled together in a Cochrane review. Cochrane is an international organization that gathers and checks medical research. Here is the short answer. When people started taking vitamin C after a cold had already begun, the trials found no consistent benefit. Below we look at what the trials showed about taking it regularly, whether people really run low on vitamin C, how much a person needs, and why more isn’t better.
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Bacteria were found in 79.57% of 93 used mascaras
That's what a British study found when it tested mascara people had already been using. We gathered studies like this from four countries. Here we walk through what was found in the tubes, what it can mean for your eyes, and which habits eye doctors and the U.S. regulator recommend.
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