Calcium absorption and utilization and factors affecting them can be studied with isotopic tracers.  Calcium absorption is highest during liefestages of growth and decreases dramatically with age.  Calcium absorption is also more efficient in subgroups genetically programme for larger bone mass, i.e. males greater than females and blacks greater than whites.  Calcium absorption efficiency is higher in Asians, but when calcium intakes are low, bone accretion is reduced.  Some bioactive ingredients or food components enhance calcium absorption and inhibit bone loss.  Prebiotic fibers serve as substrates that shift the gut microbiome to favor fiber fermenters resulting in enhanced mineral absorption during growth and bone retention in postmenopausal women.  Polyphenolic-rich fruit can enhance calcium utilization, but it depends on sex and sex steroid status.

Calcium absorption and metabolism is influenced by age, sex, race, bioactive constituents, and the gut microbiome

2019 Fall National Meeting

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