The document discusses building a healthier burger option by finding alternatives to the existing bun and cheese that have fewer calories, fat, and carbohydrates. It shows that switching to an alternative bun reduces calories from 260 to 140, fat from 5g to 2g, and carbohydrates from 45g to 27g. An alternative cheese reduces calories from 125 to 70, fat from 9g to 4g, and keeps carbohydrates at 1g. These changes combined lower the total burger calories from 585 to 410, total fat from 27g to 19g, and total carbohydrates from 46g to 28g.