In the Dragon Ball franchise, Saiyans do not inherently live significantly longer than humans based on their species alone. Saiyans have a typical lifespan of around 80 years under normal circumstances, which is comparable to or even slightly shorter than the average human lifespan in the real world. However, the practical longevity of Saiyans in the series is complicated by several factors. First, Saiyans in the Dragon Ball universe often die in combat rather than from natural aging, making direct lifespan comparisons difficult. Second, Saiyans are much stronger and more resilient than humans, allowing them to survive injuries and dangerous situations that would kill ordinary people. Third, some Saiyans have benefited from life-extending methods like the Hyperbolic Time Chamber or wished for eternal youth through the Dragon Balls—options also available to humans in the series. The most telling comparison is Vegeta, who remains physically active and combat-capable well into his 60s and 70s, demonstrating that Saiyans maintain their strength and vigor throughout their natural lifespan rather than declining as humans typically do. So while Saiyans don't live dramatically longer, they experience a higher quality of life and remain powerful far longer into their lives than humans do.