People with severe damage to intestinal tissue may be prescribed intravenous nutritional supplements in order to replace unabsorbed nutrients.
Glucose may also be found in the stool sample, resulting from unabsorbed lactose in the colon.
Because the 25 percent of fat intake passes through the body unabsorbed, it makes its way out via the intestines.
Having by these means condensed as much as I could of the phlogisticated air, I let up some solution of liver of sulphur to absorb the dephlogisticated air; after which only a small bubble of air remained unabsorbed, which certainly was not more than of the bulk of the dephlogisticated air let up into the tube; so that, if there be any part of the dephlogisticated air of our atmosphere which differs from the rest, and cannot be reduced to nitrous acid, we may safely conclude that it is not more than 7a part of the whole."
The foregoing experiments indeed, in some measure, decided this point, as much the greatest part of air let up into the tube lost its elasticity; yet, as some remained unabsorbed, it did not appear for certain whether that was of the same nature as the rest or not.