The 75 Hard Challenge can help improve brain health by promoting habits that support cognitive function and overall mental well-being. The program's structure encourages participants to engage in daily practices that enhance brain health, such as regular exercise, proper nutrition, and mental stimulation. By following a healthy lifestyle for 75 days, participants can improve their cognitive function, memory, and mental clarity. The challenge's emphasis on discipline and consistency helps individuals make lasting changes that support brain health. The daily reading habit can include books on brain health, providing valuable insights into maintaining optimal cognitive function.