Mind & Mood Archive

Researchers have found that the risk of death due to Alzheimer's disease is markedly lower in taxi and ambulance drivers compared with hundreds of other occupations. And the reason could be that these drivers develop certain structural changes in their brains as they work.

A 2024 study of more than 32,000 depression-free women who were followed for 14 years found that those who ate the most weekly servings of citrus (six or more) had a 22% lower risk for developing depression, compared with those who ate the least citrus.

In a 2025 Harvard study of more than 133,000 people followed for four decades, those who ate the most red meat each day (a quarter-serving or more) had a 13% higher risk of developing dementia later in life, compared with people who ate the least.

A 2025 study suggested that people who eat higher amounts of processed red meat may be more likely to develop dementia than people who eat very little of it.

In a 2025 study of about 2,000 people (average age 80) who were followed for seven years, about a third developed dementia or mild cognitive impairment. Being socially active seemed to delay that diagnosis for about five years.

It's fairly common for a medical treatment to cause side effects - but far more rarely, a side effect provides an unexpected benefit. This might be the case for the shingles vaccine, as evidence is mounting that it might also reduce the risk of dementia.

Eating high amounts of processed red meat each day may increase the risk for future cognitive decline and dementia. Switching out processed red meat for nuts, legumes, low-fat dairy, chicken, or fish also may lower the risk.