Short answer: magnesium supports the relaxation of smooth muscle in blood vessel walls — a distinct, mineral-based mechanism from nitric-oxide-based circulation support, addressing a different piece of the puzzle.
What "vascular smooth muscle" means
Blood vessel walls contain smooth muscle tissue that contracts and relaxes to regulate vessel diameter. Magnesium is an essential mineral involved in this relaxation process, relevant to overall vascular and cardiovascular function.
Why this differs from nitric-oxide mechanisms
Where L-Citrulline works through the nitric-oxide signaling pathway, magnesium's role is more directly mineral-based, supporting muscle relaxation at a cellular level — a genuinely separate mechanism.
Why formulas often include both mechanisms
Addressing circulation from both a signaling-molecule angle (nitric oxide) and a mineral-based muscle-relaxation angle (magnesium) reflects a broader, more complete approach to vascular support.
See magnesium in Boostaro's formula
Named plainly, alongside six other actives.
See the Ingredients