The Short Version
The scientific literature broadly supports the link between improved mitochondrial function, increased biogenesis, and healthier aging at the cellular level. Multiple high-authority peer-reviewed reviews confirm that maintaining mitochondrial activity is associated with better aging outcomes in humans. However, key sources use conditional language ("might," "seems") rather than asserting definitive causation, and some evidence is drawn from animal models or specific tissues like skeletal muscle. The claim's phrasing — "contribute to" — is appropriately hedged and aligns with the weight of current evidence.