for brain health including heart conditions physical activity mentally stimulating activities like reading books and doing crosswords and other factors but the contribution from these other factors is always a concern in observational studies and can never be fully ruled out she noted both devi and morris recommend against taking supplements of the studied nutrients and advocate for incorporating leafy greens instead its just so much easier and safer to get them from nature devi said so should you eat a bowl of lettuce every day to prevent dementia maybe these findings suggest that greens might help keep your mind sharper plus eating an extra cup of spinach every day probably isnt going to hurt you there arent any drawbacks morris said