However, they also contain high levels of oxalic acid.
This classification is mostly obsolete in English-language sources, but is still used in other countries such as Japan.
Calcium is also available as a dietary supplement.
Vitamin D plays a significant role in absorbing calcium from the gastrointestinal tract, so it is important to have adequate amounts of both nutrients to support optimal health.
In 1755, proved that this was due to the loss of , which as a gas had not been recognised by the ancient Romans.
Muscle contraction Calcium helps regulate muscle contraction.