The best picks keep calories in check and let protein do the heavy lifting.

Stacker identified the single most caloric burger at 20 major fast-food chains using nutritional data from Nutritionix, the FDA's daily value guidelines, and individual company websites.

Merve Ceylan is a dietitian and health writer with four years of experience writing for companies in the nutrition and health industry. Coconut oil and processed meats have high amounts of saturated ...