“Left-handed people die younger.”

The notion that left-handed individuals have a shorter lifespan than their right-handed counterparts is a persistent misconception with origins in flawed research from the late 20th century. This myth gained traction following a 1988 paper in *Nature* and a subsequent 1991 study in the *New England Journal of Medicine*, both of which examined mortality rates and handedness. These studies, notably by psychologists Diane Halpern and Stanley Coren, observed that left-handers appeared to die at a younger average age, sometimes suggesting a difference of several years. For instance, one study found left-handers died at an average age of 66, compared to 75 for right-handers.

However, these initial findings were based on methodologies that failed to account for crucial demographic shifts and societal pressures. Critics quickly pointed out that older generations of left-handed individuals were often forced to switch to using their right hand in childhood due to social stigma or educational practices. This meant that studies relying on self-reported handedness or next-of-kin accounts for deceased individuals would inherently underrepresent true left-handers in older age cohorts, making it seem as though fewer left-handers lived to old age. Essentially, the pool of older individuals identified as left-handed was artificially smaller, leading to a skewed average lifespan.

The myth also persists partly because such a striking claim about a common demographic trait is easily remembered and shared. The idea that being different could lead to a disadvantage, even in terms of longevity, can be compelling. Furthermore, some early research speculated that left-handedness might be linked to subtle brain injuries or immune system disorders, which could theoretically affect health and lifespan. However, more robust and modern research, including studies that control for historical changes in handedness recording, consistently refutes any significant difference in lifespan based on hand dominance. The scientific consensus today is that handedness does not impact how long a person lives.