Early Sexual Activity Linked to Faster Aging, Shorter Lifespan: Study

Early sexual initiation could lead to a shorter life, faster aging, and increased physical frailty, according to a large genetic study published in "Healthcare and Rehabilitation." Researchers, led by Kaixian Wang from Shandong University in China, explored the long-term health impacts of starting sexual activity at a younger age.

While previous research linked early sexual experiences to risks like STIs and unplanned pregnancies, this study highlights other mechanisms. The researchers suggest that earlier exposure to sex hormones can increase oxidative stress and genetic damage. Chronic stress from unplanned pregnancies or difficult youth experiences may also burden the immune and cardiovascular systems over time.

To investigate the cause-and-effect relationship, scientists employed Mendelian randomization. This method analyzes genetic variants inherited at conception, which can predispose individuals to certain behaviors. By examining these genetic predispositions, researchers aimed to minimize the influence of confounding factors such as education, wealth, or environment.

The study analyzed genetic data from hundreds of thousands of individuals of European descent, including information from the UK Biobank. They identified genetic variants linked to earlier sexual initiation and compared these with markers of aging, lifespan, parental lifespan, and physical frailty. The findings indicated a correlation between a genetic predisposition for earlier sexual activity and earlier death, greater physical frailty, and poorer healthy aging outcomes.

Further analysis pinpointed physical frailty, depression, chronic obstructive pulmonary disease (COPD), and ADHD as key factors contributing to the negative aging effects. The researchers noted that ADHD, in particular, can foster impulsive behaviors, including earlier sexual experiences.