On Mon, 26 Nov 2018 11:55:03 -0500, Phil Hobbs
wrote:
Yah, all that trace mineral nutritional data is super dodgy. Some grad
student in the '50s measured three bananas from a plot fertilized with
potash, and surprise surprise all bananas became "a good source of
potassium" forever, no matter what soil conditions they're grown in.
Nutrition 'science' is largely a cargo cult.
Cheers
Phil Hobbs
At first, I thought it has to be much better than that. I couldn't
find anything specific on the equipment or methods that the FDA uses
to populate the ubiquitous nutrition facts label except that its
derived from a database maintained by the US Dept of Agricultu
https://en.wikipedia.org/wiki/Nutrition_facts_label
https://ndb.nal.usda.gov/ndb/
Only 928 different banana foods lists. Ugh. Selecting a raw banana
from the list, I find:
https://ndb.nal.usda.gov/ndb/foods/show/09040?fgcd=&manu=&format=&count=&max=25&offset=&so rt=default&order=asc&qlookup=banana&ds=&qt=&qp=&qa =&qn=&q=&ing=
containing Potassium between 290mg and 806mg per 100gram banana
depending on how it's pre-processed. Click on "full report" button
for a list of accepted values and long lists of data sources.
A similar discussion:
"How do they measure the nutritional data of food? How accurate are
the labels?"
https://www.quora.com/How-do-they-measure-the-nutritional-data-of-food-How-accurate-are-the-labels
https://www.quora.com/How-are-the-nutrition-facts-on-food-labels-verified
In the majority of cases, the producer of a food product
looks up each of the ingredients in a food database, and
determine the nutritional contribution of each ingredient
in the recipe based on it's weight. The USDA maintains
a large database of foods (raw and processed) for reference.
Perhaps you're correct. The USDA data might be garbage, assuming the
database was originally populated with inaccurate data, and that no
effort has been made to fix the problem. Maybe just add a few more
significant figures to the data so that it looks more accurate.
Banana:
https://www.checkyourfood.com/ingredients/ingredient/62/banana
Not high in potassium as popularly thought but still good
for your immune system and mood.
Oops. No wonder my ancient Geiger counter doesn't show much activity
from the K-40.
https://en.wikipedia.org/wiki/Banana_equivalent_dose
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060
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Skype: JeffLiebermann AE6KS 831-336-2558