The taste receptors on the tongue detect extremely small concentrations of substances within the short time it takes to taste it. (philmaffetone.com)
And if there are no DNA organisms, are there other types of organisms that might occur there in very small concentrations? (discovermagazine.com)
Eating the 12 least contaminated will expose a person to less than 2 pesticides per day, and in much smaller concentrations. (personal-nutrition-guide.com)