This is a Diet Analysis of the 75-year young man based on his recalling food and drink consumed over the past 24 hours. There is quite a bit of variation in the diet over the day. Most essential nutrients are well represented when looking at their %’s of the Recommended Daily or Dietary Intakes (RDI). Folate, Vitamin C, Vitamin E, Calcium, and Water, have room for improvement. Very little vitamin D is available from food.
Also of interest, is that we also analysed this gentleman’s drinking water. The water comes from a bore and stored in a tank. Mostly the water is fine with some generous amounts of zinc that still fell within the Australian drinking water guidelines. Of interest, though is that according to Australia water guidelines, the water is not suitable for irrigation purposes due to the elevated zinc.
When looking at the foods eaten over the 24 hr period we see that 3 cups of tea were consumed. This comes to about a litre. From the water analysis, we can calculate that this works out to just over 2mg zinc consumed over the day from tea alone.
According to the 24hr food recall, analysis zinc intake was about 100% of the RDI. For a 70-year-old man the Australian RDI for zinc is 14mg/day and this is what was available from food alone. Total possible food + water zinc intake is, therefore, 14mg.
The Australian government also publish evidence-based upper levels (UL) for many essential nutrients. This is especially important for those people who supplement. The upper limit for zinc intake over a day is 40mg. So when we add the water and the food sources of zinc intake together, we are well below the upper recommended level.
“There is no evidence of adverse effects from naturally occurring zinc in food. The UL applies to total zinc intake from food, water and supplements (including fortified food). Adverse events associated with chronic intake of supplemental zinc include suppression of immune response, decrease in high-density lipoprotein (HDL) cholesterol and reduced copper status. The adverse effect of excess zinc on copper metabolism has been identified as the critical effect on which to base the UL.”
Here is the original data sent to us to analyse…