Cooking eggs for too long at high heat can reduce the levels of certain vitamins and antioxidants. Overboiling can also affect the texture and flavor of the eggs, making them rubbery and less enjoyable.
Using an egg timer makes cooking easier and more precise. Simply turn the timer all the way to 60 minutes to wind the spring, then turn it back to your desired cooking time, such as 5 minutes. The timer will alert you with a classic ringing sound when the time is up.