Unlike normal magnesium supplements, high-absorption magnesium supplements are usually dissolved in a liquid, or they are in the aspartate, citrate, lactate or chloride form, reports The National Institute of Health. Magnesium in the liquid form absorbs more completely in the gut than less soluble forms.
Magnesium is a necessity to the function of the body. It is a naturally occurring mineral, present in many foods and supplements. Green leafy vegetables usually contain the highest amounts of magnesium, reports the University of Maryland Medical Center. These vegetables include spinach, legumes, nuts, seeds and whole grains. Mineral water can also be a source of magnesium, but the amount contained in each brand widely varies.
Consuming low levels of magnesium for long periods of time results in magnesium deficiencies, notes The University of Maryland Medical Center. The symptoms of a magnesium deficiency include agitation and anxiety, sleep disorders, irritability, nausea and vomiting, abnormal heart rhythms, low blood pressure, hyperventilation, insomnia, poor nail growth and even seizures.
High doses of zinc in supplemental form can interfere with the absorption of magnesium, says Oregon State University. One study shows that high doses of zinc not only interfere with the absorption of magnesium but also the balance of magnesium within the body.