Short answer: Zinc & Magnesium are essential minerals involved in hundreds of everyday enzymatic reactions, while L-Carnitine is an amino acid involved in transporting fatty acids into cells to be used for energy.
What each ingredient specifically contributes to the energy angle
Zinc and Magnesium provide broad, foundational mineral support across hundreds of reactions; L-Carnitine adds a more specific, targeted role in fatty-acid transport for cellular energy.
Why this rounds out the formula's broader energy claim
Alongside Vitamin B12's role in energy-yielding metabolism, these three ingredients contribute additional, complementary angles to the formula's steady-energy positioning.
💡 Worth knowing: these are essential minerals and an amino acid — general nutritional contributors, not specifically flagged for the blood-sugar-lowering caution that applies to several other ingredients.