OstroVit - Histidine is an amino acid...
Now Foods - Magnesium Citrate contains a fast-absorbing source of magnesium.
Puritan's Pride - Magnesium Dietary Supplement contains magnesium, which promotes bone health, muscle contraction and nerve impulses.
Now Foods - Magnesium Citrate is a magnesium citrate supplement that is the most easily absorbed by the body compared to other forms of magnesium.