How long does it usually take to boil eggs?

　　Speaking of hard-boiled eggs, many people are familiar with them - they are the same food that is often eaten for breakfast. Not alive egg contains bacteria and must be cooked so that it will not affect healthy . Here is a question, how to cook eggs that are both delicious and safe? How long does it take to boil an egg? Below, the editor will give you some tips on boiling eggs and tell you how long it takes to boil eggs.

　　The water must cover the eggs, otherwise the protein will not coagulate easily and affect digestion.

　　Raw eggs not only have the problem of salmonella contamination, but also have two harmful substances, anti-enzyme protein and avidin. The former will affect the digestion and absorption of protein ； The latter can combine with biotin in food, causing biotin deficiency in the human body and causing symptoms such as mental fatigue and muscle soreness.

　　How long does it take to boil an egg? If an egg is cooked in boiling water for more than 10 minutes, a series of chemical changes will occur inside it. The protein structure becomes more compact and is less likely to come into contact with the protein-digesting enzymes in gastric juice, making it more difficult to digest. In addition, the methionine in eggs will decompose into sulfide after being heated for a long time, which reacts with the iron in the yolk to form iron sulfide that is difficult for the human body to absorb, resulting in greater nutritional losses. So, how long does it take to boil an egg?

　　Soak the eggs in cold water for a while before cooking to reduce the air pressure inside the eggs； Then use medium heat and boil cold water to prevent the eggshell from cracking and avoiding the loss of nutrients.

　　Boiling eggs seems simple, but it is difficult to control the heat. If the time is too short, the yolk will be undercooked, and if the time is too long, the eggs will become old and unpalatable. How long does it take to boil an egg? In this regard, experts tell us: boiling eggs for 5 minutes is the best.

　　Specific method: put the pot under cold water and wait for 5 minutes after the water boils. The cooked eggs will not only kill harmful pathogenic bacteria, but also preserve nutrients relatively completely.