How did Elros live so long?

Could you elaborate on the intriguing fact of Elros' extended lifespan? How does it come to pass that he lived such an abnormally long time? Is there a specific reason or set of conditions that contributed to his longevity? Was it due to some unique genetic trait, perhaps a magical blessing, or maybe a lifestyle choice that allowed him to age gracefully? Could you possibly offer some insight into the mechanisms behind his remarkable lifespan? I'm genuinely curious to understand the details surrounding this phenomenon.