I donated blood today, 300CC. What are the advantages and disadvantages of donating blood?

Healthy people donate blood according to regulations, which will not have any impact on their health. After blood donation, the hematopoietic tissue of the human body will automatically accelerate hematopoiesis, and generally it will return to its original level after half a month. It is necessary to supplement nutrition properly after blood donation, but there is no need to eat and drink. Appropriately increase nutrition and provide enough raw materials for blood production, focusing on protein, iron, vitamin B 12, folic acid, etc. It is worth reminding that if a large number of supplements are inactive, it will not be conducive to the digestion and absorption of nutrients, leading to gastrointestinal dysfunction and obesity due to excess calories. High iron content in human blood will obviously increase the risk of heart disease, and proper blood donation can greatly reduce the iron content in blood. It won't do any harm to donate blood in moderation, protect the puncture hole after blood donation and supplement nutrition properly. Donating blood without compensation is a noble act of selfless dedication and saving lives, and it is the embodiment of the spirit of loving one's post and dedication. When you donate a small amount of blood to save other people's lives, you will be rewarded. Free blood donation is beneficial to people, self-interest and society. It has six advantages: first, donating blood for free gives you an opportunity and platform to show your love, which fully embodies the mutual care, love and care between people. Blood donation has become a bond linking human love. Second, unpaid blood donation will stimulate the human hematopoietic function to be more vigorous, accelerate the production of blood cells and promote blood metabolism. People who donate blood regularly maintain a relatively vigorous metabolism due to the continuous stimulation of the bone marrow hematopoietic system, and constantly produce more energetic young cells, and the proportion of fresh blood cells is significantly higher than that of people who do not donate blood. 3. Free blood donation can reduce or delay the occurrence of diseases. Scientists used fluid deformation and hemodynamics to study the relationship between blood and blood donation. When people donate blood, it will reduce blood viscosity, speed up blood flow, enhance the ability of supplying oxygen and transporting nutrients, and prevent cardiovascular and cerebrovascular diseases such as stroke (cerebral thrombosis and cerebral hemorrhage) and hypertension. It can also reduce the incidence of cancer. Fourth, the average life expectancy of unpaid blood donors is higher than that of non-blood donors. According to the investigation of Karl et al, 332 people who participated in regular blood donation were compared with 339 people who did not donate blood in the same area. The average life expectancy of blood donors is 70. 1 year, while that of non-blood donors is 67.5 years. 2.6 years older. Five, unpaid blood donors get free medical examination. The blood of unpaid blood donors will be systematically examined (rapid examination, initial examination and re-examination three times), and there are eight examination items, namely blood type, RH, hemoglobin, transaminase, hepatitis B, hepatitis C, syphilis and AIDS. Only all qualified blood can be provided for clinical needs, which is equivalent to giving you a comprehensive and detailed blood examination. You can get detailed results after a week of blood donation, and experienced doctors will consult and guide you. 6. Free blood donors and their immediate family members (parents, children) and spouses will receive free blood use. I will enjoy three times the amount of blood donation in three years and use the same blood after three years. Over 800 ml, I will use unlimited blood, and immediate family members and spouses will enjoy the same amount of blood. Fully embody the concept of "everyone for me and I for everyone". At the same time, it is also the full embodiment of your "love, filial piety and care", that is, love for others, filial piety for parents and care for your wife and children. Donating blood for free is not only for others today, but also for yourself tomorrow.