This ... comes from ...
Nope. This comes from the fact that when you do proper studies about overdosing (which is what you do with needless supplementation) various micronutrients you find that it is at best useless and at worst harmful. Then I added my own spin on the cause of it rather than listing studies for each chemical because I can't be bothered to write a meta study.
... if you want ... vitamin C ...
Then you should eat at least some fresh food. If you are a normal American or European you should probably also eat more fruit, but you don't need to worry about your vitamin C intake. (Unless you take more than ten times RDI ie one pill per day, in which case you should decrease your intake of vitamin C and still eat more fruit)
Edit: Based on jimrandomh's claim below I think that I should clarify that by "needless supplementation" I mean any supplementation done when it has not been demonstrated (eg with blood work at a clinic) that you have a deficiency of that particular mineral.
Edit: Based on jimrandomh's claim below I think that I should clarify that by "needless supplementation" I mean any supplementation done when it has not been demonstrated (eg with blood work at a clinic) that you have a deficiency of that particular mineral.
Bayes disagrees with you.
If you know that most people in your country (the United States for example) are deficient in vitamin D then prior to having blood work done, and absent any other evidence you have collected that suggests you are an exception, you should expect to be deficient in vitamin D.
(Original Post: Announcing the Quantified Health Prize)
I've recently been hired by Personalized Medicine, a new research company trying to bring Less Wrongian rationality to the medical world. We're giving away a $5000 prize for well-researched, well-reasoned presentations that answer the following question: What are the best recommendations for what quantities adults (ages 20-60) should take the important dietary minerals in, and what are the costs and benefits of various amounts?
Entries are now due by January 15th, 2012. This is an update from the original date of December 31st, 2011. However, we will not change this deadline again, and it will be strictly enforced. If you submit your entry on January 16 at 12:01 AM Pacific time, we will not read it.
Why enter the contest? If you have an excellent entry, even if you don’t win the grand prize, you can still win one of four additional cash prizes, you’ll be under consideration for a job as a researcher with our company Personalized Medicine, and you’ll get a leg up in the larger contest we plan to run after this one. You also get to help people get better nutrition and stay healthier.
More info about the contest, and instructions for submitting entries, can be found at the contest website at http://www.medicineispersonal.com/contest/home. Good luck!