The document discusses building a healthier burger option by finding alternatives to the existing bun and cheese that have fewer calories, less fat, and fewer carbohydrates. It shows that switching to an alternative bun that has 140 calories instead of 260, 2g of fat instead of 5g, and 27g of carbohydrates instead of 45g would reduce the burger's nutrition. Similarly, using an alternative cheese with 70 calories instead of 125, 4g of fat instead of 9g, and the same 1g of carbohydrates would also reduce the burger's overall calories from 585 to 410, fat from 27g to 19g, and carbohydrates from 46g to 28g.