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Quackery or Solid Science: The Zinc Tally Test - Does it Work? How Does It Work? And How Reliable is It?

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"Any idea if zinc tally test is reliable? Google spits somewhat mixed conclusions." That's what SuppVersity reader David Salda asked two days ago on the SuppVersity Facebook Page and this article is a somewhat lengthy answer to a short, but very valid question. I know that only few of you are running a website, let alone one with daily updates, but if you do you the following incident may sound vaguely familiar: You are just trying to keep up with the comments on questions on the Facebook page of your website , when an innocent question like "Any idea if zinc tally test is reliable? Google spits somewhat mixed conclusions." someone (in this case David Salda) posted on your Facebook wall , reminds you of the written, yet never finalized and published articles that lie dormant in the depth of your website's draft folder... don't get me wrong, this is unquestionably a good thing - I mean I guess there will be more people than David, who would like t...
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Are You ABCDE-Deficient? Common Nutrient Deficiencies in the US. Plus: How Food Fortification & New "Daily Values" Affect the Intakes of Vitamin A-E, Calcium Iron & Co

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Nutrition labels on fresh blueberries - do we really need them? I sill remember that I was shocked, when I bought a pack of blueberries and found a nutrition label underneath the plastic cover of my expensive 150g health-investement... That's probably 2 months ago and the reason I do remember this event now is the publication of a paper that examines the effect a change in the "daily values" (i.e. the references), the figures in the obiquitous black and white table are based on, would have on the average US citizen's nutritional intake of the vitamins A, D, E, C, B-12 and folate, and the minerals calcium and iron. "Daily Values" (DV), fortified foods and nutrient adequacy: Before I dig deeper into the actual study results, it's probably wise to point out that fortified foods are the link between the DV's and micro-nutrient intake of the average American. If manufacturers continue to fortify foods to the same %DV for each nutrient, the extent...
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Loss of Trace Elements not a Concern in Well-Hydrated Athletes

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If you are a hard-training athlete you need more than "trace amounts" of trace elements, don't you? No, actually not. You may be somewhat disappointed now, but the expensive trace element supplement you just ordered might turn out to be a complete waste of money - at least, this is what the results of a recently published study by Carlos González-Haro et al. ( González-Haro. 2010 ) suggest. Figure 1: Changes in plasma trace element levels (Zn, Mn, Se and Co) for the different relative exercise intensities studied and the 7 min recovery period. As figure 1 (above) shows, lactate concentrations constantly increased in the course of the 7 minutes after a cycloergometer test, where, after a warm-up of 10 min at 2.0 W kg −1 , workload had been increased by 0.5 W kg −1 every 10 min until exhaustion. The trace mineral concentration, on the other hand, remained stable over the whole study period (exercise + recovery). This observation led the scientis...
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