About the nitric acid, see
http://www.gfhnrc.ars.usda.gov/news/nws9903a.htm

Also, the zinc _must_ be in proportion with copper (~7:1), lest one
suffer zinc poisoning/copper deficiency which results in irregular
heartbeat and/or 13 other listed nasty problems.

William

Amadeus Schmidt wrote:
> snip
> There are assumptions that "nowadays" more B12 is required for humans.
> E.g. because of NO (nitric oxid) from the environment which may destroy some
> of it. Or maybe a disturbed gut flora by Helicobacter pylori, see:
> http://www.yourhealthbase.com/vitamin_B12.html
>
>snip
> This may explain the better availability of zinc of unrefined grain eaters.
> If they eat them in a traditionally proven way.
>
> In addition grains have more zinc per weight (and therefore much more zinc
> per kcal or protein).
>
> 100g beef       has  3.8 mg zinc this is 0.19 mg per gram protein
> 100g millet     has  4   mg zinc this is 0.74 mg per gram protein, 4 fold
> 100g wheat germ has 12   mg zinc
> while 15mg is on my recommendation list.
>
> People usually eat much more millet or wheat per day as meat.
> (600g of wheat/millet compared to 250g meat average in germany)
>
> Only heavy meat dieters (without grains) can overcome the zinc shortage of
> conventional nutrition. Or traditional grain eaters.
>
>snip
> regards
>
> Amadeus