Hi there. The causes of memory loss can be aging, alzheimer’s disease, trauma, side effects of certain drugs, etc. the loss which has occurred cannot be reliably reversed but further can be prevented. Eat nutritious foods, reduce stress, check and keep your blood pressure under control to prevent strokes etc, sleep deprivation to be avoided, dietary supplements like multivitamins and mineral complexes like lecithin, garlic, vitamin B complex, zinc, copper vitamin C helps. These help remove the harmful free radicles. You must also indulge your mind in puzzles, strategy games, word games and number games to stimulate the brain cells and halt memory loss. Take care.