Within China, India & Indonesia, Asia’s most populous countries, the average intake stands at around 338mg per day. This is far below the recommended daily intake of 1,000mg. Other Asian countries have a similarly low calcium intake ranging between 175mg to 500mg per day.
According to the interactive online map launched by the International Osteoporosis Foundation, which looks at data published around calcium intake around the world. According to the map, South America fared slightly better than Asia, with calcium intake ranging from 400mg to 600mg daily.
Northern European countries were top of the list, with Iceland, Ireland and Germany exceeding the recommended daily intake.
The study “did not find any consistent differences between sexes, age group, rural and urban populations in their calcium intake” says the author of the
study. “It accounts for 30% to 35% of bone mass, as such, low intake may adversely affect the retention of bone mass in older adults”.
It is a major building block of bone, accounting for about 30 to 35 percent of its mass and much of its strength. The impact of calcium intake is most significant during adolescence, when the skeleton gains bone mass, and during later life when bone loss occurs at a rate of about one percent per year, resulting in calcium loss of approximately 15 g per year. A major concern is that in countries with sub-optimal dietary intake, the population may be putting itself at increased risk of osteoporosis and related fractures.
Hip fracture is projected to increase from 1.6 million in 1990 to 6.3 million by 2050, with China and South America accounting for the majority of the cases, stated the study. In China hip fractures in the elderly have risen significantly in the past 20 years.
Vitamin D links
According to the study, a low intake of calcium corresponds with a low level of vitamin D. The link is seen in China, Malaysia, India and South Korea where vitamin D levels are low. As vitamin D plays a role in building and maintaining healthy bones. Inadequate amounts can have a negative impact on peak bone mass.
Supplements
When your intake is insufficient, your body begins to remove calcium from bones, resulting in them becoming weak and brittle. This can result in osteoporosis, of which women are at higher risk. 
Supplements come with many benefits. They may help prevent bone loss in postmenopausal women, which lose bone mass due to a decline in estrogen. Several studies have suggested that providing a supplement may reduce overall bone lose by 1-2%.
Calcium is one of the most essential minerals for healthy bones, gums and teeth. It strengthens the backbone, helps to alleviate back pain and keeps bones growing in proper shape.
As well as this, a 2016 study examined the effects of providing daily calcium supplements to the overweight and obese college students that had very little within their diets. The study found that those given a supplement containing 600mg of calcium and 125 IUs of vitamin D lost more body fat on a calorie-controlled diet than those who didn’t consume the supplement.