I believe everyone has eaten ketchup, but now do you know? /kloc-in the 0 th and 9 th centuries, ketchup was once a medicine. Studies have shown that tomato sauce is very effective in reducing the content of low density lipoprotein cholesterol in human body, which can reduce the risk of heart disease and stroke. It can be described as nutritious food. After modern improvement, it has become a condiment. Looks like I'm going to the supermarket to buy a bottle of ketchup to honor my parents today.

Calcium supplementation, a high-frequency word in the mouth of an elder, often haunts our ears from childhood to defecation. When it comes to calcium supplements, people will inevitably think of milk, sparerib soup and shrimp skin, but do you know? Besides drinking milk, eating vegetables can also supplement calcium. The calcium content of some green leafy vegetables is about 100 mg/100 g, which is equivalent to or even much higher than milk. Such as shepherd's purse, amaranth, kale, etc., you can eat vegetables properly to supplement calcium for your body.

Fish is rich in protein, which is good for people's health. Whether it's braised, steamed or stewed, or eaten raw, dried fish and fish balls, they all have their own fans. But if it is not processed, it is fishy and smelly, and only cats may like to eat it. The fishy smell of fish mainly comes from a substance called trimethylamine. Many marine organisms secrete trimethylamine to lower the temperature of body fluids.

Do you know how long it takes to boil an ostrich egg? The ostrich egg is the largest existing egg in the world, and its shell is very hard and thick. Cooking this big guy takes about 30 times as long as cooking an egg. Generally, ostrich eggs can only be cooked half-cooked in 45 ~ 60 minutes, and it may take 1.5 hours to cook ostrich eggs completely. The taste of ostrich eggs is not much different from eggs. They are fat-free, low in calories, low in cholesterol, high in protein and high in calcium. At the same time, they also contain a lot of vitamins and trace elements, so they are called "the king of 100 eggs".

The above is the interesting knowledge of cold dishes that will not be mentioned in the recipe. What else do you know? Remember to leave a comment.