Sap by the fact that phloem sap is physiologically extreme in terms of animal digestion, and it is hypothesized that few animals take direct advantage of this because they lack two adaptations that are necessary to enable direct use by animals. These include the existence of a very high ratio of non-essential/essential amino acids in phloem sap for which these adapted Hemiptera insects contain symbiotic microorganisms which can then provide them with essential amino acids; and also insect "tolerance of the very high sugar content and osmotic pressure of phloem sap is promoted by their possession in the gut of sucrase-transglucosidase
Sugary drink tax third parties (MXC) and so want to consume at the unregulated market equilibrium to maximize their utility. This means that there is overconsumption of sugar and a welfare loss is created. The sugary drinks tax, a Pigovian tax, is a way to correct the negative externality by regulating the consumption of sugary drinks. Without a sugary drink tax, taxpayer money is used to pay for higher health care costs incurred from high consumption of sugar. Although this solution corrects the negative consumption externality, taxpayers that consume sugary drinks moderately and hence do not contribute to higher health care costs, still