Brain Health

It's the ability of the brain to function effectively, which includes memory, attention, language, decision-making, and emotional regulation. It covers both the prevention of brain diseases and day-to-day function. Brain health is not fixed: it is influenced throughout life by genetics, environment, and (crucially) lifestyle habits.

Yes, to a meaningful degree. Exercise, quality sleep, certain nutrients, and stress management all support cognitive function. Exercise is particularly effective. Although most lifestyle changes are modest, they compound and are cumulative over time.

Sleep is essential for brain function. During sleep, the brain consolidates your memories, clears metabolic waste products, and restores the "neural circuits" involved in attention and emotions. Sleep deprivation impairs concentration, memory recall, decision-making, and your emotional control.

Diets associated with better long-term brain health are broadly similar to those linked to better cardiovascular health (like the Mediterranean and MIND diets). Ultra-processed junk foods, excess alcohol, and diets high in refined sugars are associated with poorer cognitive outcomes and mental health over time.

Changes in memory and processing speed are normal as you age, but significant cognitive decline is not inevitable. Physical inactivity, poor diet, smoking, excessive alcohol, social isolation, chronic stress, and unmanaged cardiovascular conditions are preventable and can be delayed. However, there are no guarantees.