Here is an excerpt:
“I think that it’s clearly a [health] risk factor,” first author Nancy Donovan, MD, said of loneliness. “Various types of psychosocial stress appear to be bad for the human body and brain and are clearly associated with lots of adverse health consequences.”
Though the findings overall are mixed, the best current evidence suggests that loneliness may cause adverse health effects by promoting inflammation, said Donovan, a geriatric psychiatrist at the Center for Alzheimer Research and Treatment at Brigham and Women’s Hospital in Boston.
Loneliness might also be an early, relatively easy-to-detect marker for preclinical Alzheimer disease, suggests an article Donovan coauthored. She and her collaborators recently reported in JAMA Psychiatry that loneliness was associated with a higher cortical amyloid burden in 79 cognitively normal elderly adults. Cortical amyloid burden is being investigated as a potential biomarker for identifying asymptomatic adults with the greatest risk of Alzheimer disease. However, large-scale population screening for amyloid burden is unlikely to be practical.
Regardless of whether loneliness turns out to be a marker for preclinical Alzheimer disease, enough is known about its health effects that physicians need to be able to recognize it, Holt-Lunstad says.
“The cumulative evidence points to the benefit of including social factors in medical training and continuing education for health care professionals,” she and Brigham Young colleague Timothy Smith, PhD, wrote in an editorial.
The article is here.