Tag: Calcium absorption speed

According to Harvard Health, it takes roughly two hours for initial calcium absorption to take place in the small intestine after ingestion. However, the overall impact of how long does it take for calcium to work in the body involves a much longer timeline, ranging from immediate cellular functions to long-term bone density changes.

Fractional calcium absorption is highest in infants, at approximately 60%, and decreases to about 25% in adulthood. The speed and efficiency of this process are not uniform but are influenced by a variety of factors, including age, diet, and the presence of other nutrients like vitamin D.