What is the best way to lose weight when you are 60 years old?

Consult a doctor for the best course of action to take. A lifestyle change in addition to a good diet will definiatly contribute in the fight with weight-loss.

In general, assuming one is of average health with no disorders impacting weight; 1) Moderate exercise ever day, such as walking, bike riding, swimming, etc. 2) Several small, low calorie meals (concentrating on lean proteins and fresh vegetables and fruits) during the day as opposed to 3 larger meals at breakfast, lunch and dinner. 3) Education, will power, and persistence is the key to make the above mentioned possible. Also, you will to avoid sugary foods (sodas, cakes, cookies, candy) and foods high in saturated fats (full fat dairy, fatty meats, donuts, etc). Avoid highly processed foods filled with chemicals and preservatives. Study nutrition and get to know yourself. Be patient. Weight loss that comes all at once from a "crash diet" is more likely to return than weight lost in small increments over an extended period of time. View this "diet" as a permanent lifestyle change, not as a short-term fix to a weight problem.