Ironically, while the counterfeit anti-aging industry thrives and prospers today, serious scientific research on the mechanisms of aging is advancing at an incredible pace. Biologists studying yeast, nematodes, fruit flies, and mice have successfully extended the lives of these species through genetic manipulation. However, these genetic modifications have not yet impacted the widely recognized "hallmark of population lifespan" (the exponential increase in the risk of death after puberty), meaning that the cases of longevity observed in those experiments may not be due to successful interventions against aging. Nevertheless, further research into these genes may provide clues that guide us to identify factors influencing longevity and ultimately lead us to methods for delaying aging and postponing the onset of age-related diseases. Perhaps another promising research direction could also lead us to truly delay aging. In experiments involving "caloric restriction," all species studied so far have experienced extended lifespans and healthier lives for longer periods. This was recognized by researchers decades ago. These findings suggest that caloric restriction might also be effective for humans. Since very few people can reduce their caloric intake sufficiently low enough to extend their lifespan, biologists are currently trying to understand the mechanism of this method and seek experimental substitutes that can simulate the human response to caloric restriction without forcing them to starve. Many scientists are encouraged by current research trends. They believe that one day, treatments based on a deep understanding of aging could slow down the aging process; prior to that, some undifferentiated cells (stem cells) could be tricked into repairing damaged tissues, allowing people to stay younger and more vital for longer than they would naturally. However, not all researchers are equally optimistic. Some assert that the complexity of the aging mechanism will forever limit the development of anti-aging treatments.