A person's ability to absorb calcium varies based on ______.
vitamin A status protein intakes gender age or life stage body composition
The correct answer and explanation is:
The correct answer is age or life stage.
Calcium absorption in the body is influenced by several factors, but one of the most significant is a person’s age or life stage. This is because different stages of life demand different calcium needs, and the body’s ability to absorb and utilize calcium changes with age.
In infancy and early childhood, calcium absorption is very efficient as bone growth is rapid, requiring a substantial amount of calcium. During adolescence, there is a peak in calcium absorption, which helps to ensure proper bone development. It’s essential for young people to consume adequate calcium during this time to build strong, healthy bones.
For adults, especially women post-menopause, and older adults, the body’s ability to absorb calcium declines. This is partly because of a decrease in the hormone estrogen in women and reduced stomach acid in older adults, both of which can reduce calcium absorption. Additionally, individuals over the age of 70 are at a higher risk of osteoporosis due to the decline in bone density, and calcium absorption becomes even more critical.
During pregnancy and lactation, the body’s calcium needs also increase to support the developing fetus or the production of breast milk. However, despite these increased needs, the body adjusts by becoming more efficient at absorbing calcium during these life stages.
Other factors like vitamin D status, which is necessary for calcium absorption, can also play a role, but the most significant influence remains age and life stage. As people age, their bodies are less able to absorb calcium efficiently, making it crucial to consume adequate amounts, particularly in the later years of life.