Short answer: Magnesium and the full B vitamin complex act as cofactors in normal energy metabolism, helping cells produce usable energy.
Why "cofactors" is a specific, biological description
This names the specific supporting role these nutrients play in enzymatic reactions, rather than a vague "boosts energy" claim.
Why this is the formula's fourth, foundational system
Cellular Energy is one of four systems the formula is organized around, working alongside stress balance, hormonal foundation, and circulation.
💡 Worth knowing: Magnesium is also a cofactor in muscle function and restful sleep — a broader role beyond just energy alone.