I suspect that the largest declines in mental health, and in heart health, associated with aging is associated with obesity, but not directly because of obesity

I suspect that the largest declines in mental health, and in heart health, associated with aging is associated with obesity, but not directly because of obesity, but because of sleep apnea. Sleep apnea is very prevalent among the over-weight, and it prevents quality sleep, creating stressors of all kinds. Now that apnea is being more aggressively treated in the last decade, I actually suspect that associations between cognitive health and aging to be pushed back even further.