'The Staff of Life' and the 'Energy of Life'

  There is likeness in what is said about the benefit of grains in these two statements:
   "All grain is ordained for the use of man and beasts, to be the staff of life." Doctrine and Covenants (a book of scripture in the Church of Jesus Christ of Latter-day Saints.) Section 89
   "Glucose is the energy of life." Dr. Robert H. Lustig
   Grain is a carbohydrate. It is said that grain turns to sugar upon being processed in the gut. Glucose it a type of sugar and a type of carbohydrate. A number of years ago, it was determined all carbs are not bad. There are good carbs and bad carbs. Glucose is a good one.
   It is "the energy of life," as Dr. Lustig puts it. Even so, the code of eating for the LDS people says grain is "the staff of life." I find it interesting that so many years after a prophet of God (I believe Joseph Smith, who received the revelation in Section 89, was a prophet of God) that scientists would come along many years later and come to a similar conclusion.  Yes, it can be noted that grain is not the only glucose carb. Still, it remains that grain is a glucose carb and it is such carbs that are the "energy of life."