Short answer: Magnesium supports the relaxation of smooth muscle in blood vessel walls — an essential mineral involved in vascular muscle relaxation and cardiovascular function.
Why "smooth muscle" specifically is the named target
This is a precise anatomical detail — the specific muscle type lining blood vessel walls — distinct from a vague "supports muscles" claim.
Why this is the formula's fourth of six stated mechanisms
Vascular muscle relaxation sits alongside nitric oxide production, antioxidant support, healthy circulation, arterial health, and the simple daily capsule — six connected, distinct roles.
💡 Worth knowing: Magnesium Citrate is the specific form used — worth noting this citrate form when comparing against other magnesium supplements.