l carnitine and choline Pathobiological Relationship of Excessive Dietary Intake of Choline/L- Carnitine: A TMAO Precursor-Associated Aggravation in Heart Failure in Sarcopenic Patients L-Carnitine Drink
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You also get vitamin B12 in eggs, dairy, and foods fortified with this nutrient

The cytochrome b of complex III is the only mitochondrial genome encoded subunit of this complex

doi: 10.3389/fnut.2025.1532961

Early supplementation has shown promise in restoring antioxidant defenses and reducing complications
