Shilling for Big Herba

All drugs are bad, in any amount. All vitamins, supplements and other SCAM products are good, and the more the better.

That’s the message of WDDTY, brought to you by the advertising budgets of people selling vitamins, supplements and SCAM products.

Sunshine News #1: You’re only getting a tenth of what you need

No, you really aren’t. Unless you want skin cancer. What WDDTY actually want to sell you is pills. It must be pills: they say that sunscreen is carcinogenic, so they cannot possible be advocating more sun exposure, because that would be a literally murderous level of stupid.

People who have been following the RDA (recommended dietary allowance) amounts for vitamin D could be severely malnourished: scientists have discovered the recommendation is only one-tenth of what it needs to be.

Really?

The current RDA forthe vitamin is 600 IU/ day for everyone up to the age of 70, and 800 IU/dayforthose who are older. But a team of American researchers, in response to a letter by a pair of Canadian
researchers calling on all public-health groups and agencies to urgently change the current too-low RDA for vitamin D, say the
amount we really should be getting from all sources, including sunshine, is 7,000 IU/day.

Doses that large are normally promoted by the “orthomolecular” quacks. Who are these scientists and researchers?

We have a source: Nutrients, 2015; 7: 1688-90.  The first thing to note about this is that it is not a published article, it’s a letter. WDDTY readers probably don’t know the difference. Letters do not go through peer review, they are simply expressions of opinion.

The letter responds to another letter, again not a paper. Both are contingent on an estimate of appropriate serum levels of 25-hydroxyvitamin D. The letters are estimates based on regressions – they suggest a need for further research, theya re not a confident finding, and they are absolutely not a cast-in-stone fact, as WDDTY promotes them

And even this amount is way below the safe upper limit for teenagers and adults, which may be as high as 10,000 IU/day, says Cedric Garland of the University of California at San Diego.

Garland is a darling of the orthomolecular crowd.

In fact this adds very little to what is already known: that people living in Northern latitudes may, in later life, require vitamin D supplementation.

The idea that large amounts of supplemental vitamin D are essential to life in the otherwise healthy adult human, is evolutionarily improbable and unsupported by data.

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