Four basic human taste: acidity, salinity, bitterness and sweetness. These four taste traits are usually explained in the language of chemistry. In the table above, #1 H+ hydrogen cation is the “litmus” of taste acidity. In the table above, #11 Na+ & #19 K+ (sodium and potassium cations) in salvia is the salinity taste. In the table above, #12 Mg++ & #20 Ca++ (magnesium & calcium cation) in saliva (water hardness) is bitter taste. Finally, sweetness is not defined as sugary but as #82 lead Pb++ cation. The dietary nonessential lead cation Pb++ defines the sweetness trait. Lead is not a nutrient, but taste sweet in mouth. The four taste traits concept is limited to the 19th century. Today most people speak of a fifth “savory” taste. The savory taste is referred to as “umami” a Japanese loanword.
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