Can calcium supplementation promote height? Is it useful to grasp the spring and summer growing season? How much calcium does a child need?
Is it useful to grasp the spring and summer growing season?
Spring is coming, and everything is resurrected. Is it true that human beings will also start to grow hard?
Will it be easier to grow taller in spring? This conjecture is really cute, and it is actually right.
Many studies have found that children's growth and development are indeed seasonal, and they grow faster in spring and summer than in winter. The specific reason is still unclear, and it seems to have nothing to do with temperature. Researchers suspect that it may be related to the length of the day. Interestingly, the total height throughout the year has nothing to do with the dimensions of the living area, because people of different dimensions have the same total daytime throughout the year.
Growth and development seem to accelerate in the season with long days and slow down in the season with long nights. However, the total growth of children throughout the year has been "programmed", and in different dimensions, from the perspective of the group, there is still consistency. Because high-latitude regions have long days in summer but short days in winter, the total daytime hours in regions of different dimensions are basically the same throughout the year.
The effect of the number of hours in the day on the growth rate of height.
In high latitudes, the summer days are very long, and the growth rate of children in summer is very fast, much faster than in winter. But they grow faster in summer and much slower in winter. In low latitudes, the growth rate difference between winter and summer is very small. In other words, spring and summer grow very fast, and autumn and winter grow very slowly. The total annual growth in low latitudes and high latitudes is consistent.
Although the children’s height increases at different rates in different seasons, it is fast for a period of time and slow for a period of time. Height development is faster in spring and summer, but the total annual height growth is determined by genes, nutrition and the health of the child. Seasonal changes do not make the child taller, but just show that normal development is not uniform.
Can calcium supplementation improve height?
There is no evidence that calcium supplementation can promote height.
The height of a child does have a lot to do with nutritional status. The important macronutrient is protein, and important trace elements include calcium, vitamin D, and vitamin A. However, the main thing related to height is the child's overall nutritional status, which is a balanced nutritional combination. Calcium supplementation alone cannot detect the effect of increasing height.
Calcium supplement alone has no effect on height. Studies have found that calcium supplementation for mothers before the baby is born (which will not increase the length of the newborn), or calcium supplementation after the baby is born or during childhood, has no effect on the height of the child.
How much calcium does a child need?
Data from the American Institute of Medicine, this is the latest and most accurate set of data about the daily calcium requirement by age:
- 1-3 years old, 500-700 mg (about 1.5 cups of milk per day);
- 4-8 years old,800-1000 mg (about 2 cups per day);
- 9-18 years old (adolescence) need the most calcium: 1100-1300 (needs 3 glasses of milk per day);
- Women after 51 years old and men after 70 years old also need 1,000-1200 (2.5 cups of milk);
- Other adults, including pregnancy and lactation: 800-1000 mg (about 2 cups);
As you can see from the above table, in fact, adolescent children and the elderly have the largest calcium requirements. Children need the least calcium, and they are often the people who maintain the habit of drinking milk. According to the latest edition of the Chinese Dietary Guidelines issued by the Chinese Nutrition Society, 600 mg of calcium per day is needed for children aged 1-2 years, which is consistent with the data of the American Medical Research Association.
A cup of 240-250 ml milk contains about 300 mg of calcium, but in addition to dairy products, other daily foods also contain calcium. Studies have estimated that the calcium contained in foods other than dairy products can provide about 20-30% of our daily needs, and that 70%-80% of calcium comes from dairy products (this is a very high estimate). In other words, for children aged 1-3, if 500-700 mg of calcium is needed, then 350-560 mg needs to be provided by dairy products, that is, about 280-448 ml of milk is needed.
On average, 1.5 cups (360 ml) of milk per day is sufficient for children aged 1-3, at least not less than 1 cup (250 ml), and at most not more than 2 cups (500 ml).
This recommendation is basically the same as the recommended amount of milk for young children in Australia, the United Kingdom, the United States, Hong Kong and other countries or regions.