Calcium supplementation is perhaps the most unanimous nutritional consensus among people, and in order to prevent osteoporosis, many people are trying to find ways to supplement calcium. Calcium supplementation also needs to vary from person to person. Not everyone can take calcium supplements, and there is also the possibility of heart disease, so you should never take calcium supplements blindly. Previous studies have concluded that calcium supplementation has the potential to prevent vascular disease because it can lower the level of bad cholesterol in the blood. However, in recent years, a study published in a foreign academic journal reported that people who overdosed on calcium supplements had a 30 percent increased risk of myocardial infarction, but no significant effect on sudden death or stroke. The study suggests that the likely cause of this result is excessive calcium intake, which increases serum calcium concentrations and leads to calcification of blood vessels, thereby increasing the chances of heart disease. When the concentration of calcium in the body’s cells is too high, an enzyme inside the cell is activated, destroying the internal structure of the cell, causing the DNA in the cell to break and the cytoplasm and cell membrane to separate, leading to cell rupture and death. Excessive calcium levels also cause spasms due to increased vascular tone, and blood slows or even stops. Therefore, patients with cardiovascular disease should take calcium rationally, under the guidance of a doctor, scientifically and carefully. In fact, so far, there is no clear statement as to what people must take calcium supplements, when to start taking them and for how long. However, some studies at home and abroad did find that long-term large amounts of calcium supplementation may increase the risk of cardiovascular disease and gradually increase the cause of coronary heart disease, which may be related to the deposition of calcium and phosphorus on the walls of blood vessels. Calcium is absorbed by the stomach and intestines, into the blood, forming blood calcium, that is, the amount of calcium in the blood, and then by bone metabolism, blood calcium for calcium salt deposition, the formation of bones. But it is not that the more calcium is supplemented, the more bones will be formed. Because the blood calcium concentration must be maintained at a certain level, too much or too little will not work, too much can become the cause of coronary heart disease. According to our recommended standard intake of calcium, that is, from 18 to 50 years of age, 800 mg per day; over 50 years of age, 1000 mg per day, calcium intake has not been found to increase the risk of disease. The calcium intake in this standard includes the total amount of calcium contained in food and calcium tablets. Dietary calcium supplements are an excellent way to supplement calcium, with milk, eggs, and soy milk preferred, and shrimp skin and sesame paste second. It is best to take calcium supplements as prescribed by your doctor and not to increase the dose blindly. Everything should be in moderation, and good things should not be overdone, and should be considered according to your physical condition, especially when the elderly are taking calcium supplements, they must first check if they are calcium deficient.