Recent research supports that the human lifespan is influenced significantly by environmental factors, while genetic factors tend to have a growing influence as individuals age.
According to recent research the human lifespan is mostly determined by the environment. Genes may become more of an influence with age

'Hibernation genes' help control metabolism and feeding — and could hold untapped benefit for humans - Live Science
Source: livescience.com
Key Evidence
Research highlights that humans carry genes potentially linked to metabolic control and aging processes.
the-independent.comthe-independent.comHumans may have hibernation ‘superpowers’ in untapped genes, scientists say
livescience.comlivescience.com'Hibernation genes' help control metabolism and feeding — and could hold...
Environmental impacts such as diet and lifestyle remain critical determinants of lifespan.
sciencedaily.comsciencedaily.comGenes News -- ScienceDaily
The increasing role of genetics with age is supported by studies on gene expression changes and metabolic efficiency in aging populations.
rimworldwiki.comrimworldwiki.comGenes
What the Evidence Shows
Scientific consensus indicates that both genetics and environment contribute to human lifespan, but their relative influence varies over time. Environmental factors such as lifestyle, diet, exposure to toxins, and healthcare access play a dominant role in determining lifespan during early and mid-life stages.
However, as people age, genetic predispositions related to metabolism, disease susceptibility, and cellular repair mechanisms become more prominent in influencing longevity. Recent studies on genes related to metabolism and aging processes suggest that certain genetic factors may become increasingly important in older adults. This aligns with the claim that genes may exert more influence with age.
While the environment largely shapes overall lifespan outcomes, the interplay with genetics is complex and dynamic throughout life.