[escapee]

Black tea contains high amount Tannin, a compound known to chelate with minerals ( Not good if you're mineral deficient ) and heavy metals ( good for detox ). So drinking tea does not mean that you should forgo eating food that are mineral densed and highly bioavalaible in essential minerals and amino acids.

Tannin - Wikipedia, the free encyclopedia

If ingested in excessive quantities, tannins inhibit the absorption of minerals such as iron into the body. This is because tannins are metal ion chelators, and tannin-chelated metal ions are not bioavailable. This may not be bad for someone with an infection, as iron is mopped up by the immune system to keep microorganisms from properly multiplying. Tannins have been shown to precipitate proteins,[1] which inhibits in some ruminant animals the absorption of nutrients from high-tannin grains such as sorghum.

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Tannins also complexes proteins, divalent metals, cellulose, hemicellulose, pectin and other carbonhydrates. (Mahanato, et. al., 1982). High consumption of tannin is dangerous to health, being a phenolic secondary plant metabolite with one or more hydroxyl substitutes bonded to aromatic ring, it produces anthrocyanides, another toxic product on acid degradation (Gatachew, et. al. 2000; Waterman and Cole, 1994). Another danger of consumption of high concentration of tannins is that it is not normally extracted either with solvents or detergents thus tannin-protein complexes cannot easily be broken down or digested (Perez Maldonado, et. al. 1996). The tannin content of G. Kola is low and thus can be assumed to be non-toxic. Mole and Waterman, (1987) showed that addition of 1mg/ml of tannic acid to a standard trypsin solution led to the formation of an insoluble complex