Key takeaways:
Memory refers to the brain's ability to process, store, and recall information.
Age-related changes, head injuries, and certain medications may cause memory loss.
Various strategies — like practicing mindfulness and playing brain training games — can improve your memory.
Maybe you pride yourself on never forgetting a face. Or you struggle to remember what you ate for breakfast at the end of a busy day. Both scenarios have something in common: they show that memory is dynamic and changeable. Memory is the cognitive process of encoding, storing, and retrieving information.
Everyone experiences memory lapses from time to time. After all, minor forgetfulness can be a normal part of aging. But serious memory problems may be a sign of Alzheimer's or other types of dementia. And memory problems, no matter how severe, can be troubling.
The good news is that various techniques can improve your memory.
Forming new memories is a complex process. First, your brain converts information or sensory input (encoding). Then, nerve cells called neurons form new connections to store and eventually retrieve memories.
Many factors can impair these cognitive processes, which may lead to forgetfulness. Common causes of memory loss include:
Age-related cognitive changes
Certain medications
Lack of sleep
Concussion or other head injuries
Nutritional deficiencies, such as vitamin B-1 or vitamin B-12 deficiency
Mental health concerns, such as depression, stress, or anxiety
Dementia
Your healthcare provider can help you find the cause of your memory loss and possible treatment options.
Not all forms of memory loss are preventable. But you may be able to stave off cognitive decline with these proven strategies.
A consistent exercise routine can keep your body and your brain in shape. Working out boosts circulation to the brain and increases the size of the hippocampus. This is critical because the hippocampus is a complex brain structure that plays a starring role in learning and memory. As you age, it may shrink, leading to a decline in memory. Luckily, regular workouts may improve or preserve your memory.
Eating a healthy, nutrient-rich diet may sharpen your memory. For example, the Mediterranean and MIND diets have been linked to better brain health. That's because certain ingredients — including healthy fats and antioxidants — may protect your brain from cognitive decline.
For better brain health, try to limit processed foods and those high in fat and added sugar. Instead, pack your plate with these brain-boosting foods:
Fatty fish, such as salmon, tuna, and sardines
Cruciferous vegetables, such as broccoli, kale, and cabbage
Antioxidant-rich fruits, such as blueberries, strawberries, and blackberries
Nuts and seeds, such as walnuts, almonds, and pumpkin seeds
Water is essential for your health. In fact, all the cells in your body need water to function. And research shows that dehydration may impair cognitive function, including memory, attention, and motor coordination. So, it's important to stay hydrated. Try to keep sugary drinks to a minimum and opt for water instead.
Typically, your body will tell you how much water you need for proper hydration. General guidelines can help, too:
3.7 L (125 oz) of water daily for males
2.7 L (91 oz) of water daily for females
Mindfulness is a form of meditation. It allows you to be fully present by focusing on your internal thoughts and feelings and your external surroundings. There are many ways to add mindfulness to your wellness routine. You can try journaling or mind-body practices like yoga, tai chi, or qigong.
And mindfulness isn't just a stress relief technique. It may also sharpen your focus and working memory. One study found that people who meditate often tend to have a larger hippocampus. It's that part of the brain that helps keep your memory intact.
Consider taking your wellness routine outside to boost your brainpower. Natural environments have been shown to relieve stress, improve mood, and enhance cognitive function. A 2019 study found that spending time in nature, or forest bathing, improves concentration, working memory, and impulse control. You can enjoy nature by spending time in a green space, taking a mindful walk in a park, or observing the sights and sounds outside your home.
Sleep helps your brain function properly. It's critical for learning and memory. While at rest, your brain keeps working to store new information you've learned as long-term memories.
Generally, adults need 7 to 9 hours of nightly sleep for optimal function during the day. Research suggests that too much sleep may be just as harmful to your brain as too little sleep. And sleep quality matters just as much as quantity. Poor sleep quality may raise the risk of cognitive decline. So, practice good sleep hygiene and aim for a night of restful sleep.
Catching up with friends and loved ones isn't just good for your mental and emotional well-being. It may also support better cognition. A study found that adults between the ages of 70 and 90 showed better cognitive performance in the days following positive social interactions. Another study found that the rate of cognitive decline was 70% lower among socially active older adults. So, phone a friend and get an in-person meetup on the calendar to improve your memory and mood.
Physical activity isn't the only way to boost your brain's fitness. Cognitive training involves activities that are designed to strengthen your brainpower. These "brain games" can improve working memory and cognitive flexibility in many populations.
You can train your brain with various activities to keep your mind and memory sharp. For example, solving jigsaw or crossword puzzles may slow the cognitive aging process. Or, you can go digital with popular brain training apps and video games. Another way to slow cognitive decline is by reading regularly.
Mnemonic devices are memory techniques that help you keep and recall information. There are several types of mnemonic devices, such as rhymes, expressions, or acronyms. Students often use them to learn new material.
You might remember this acrostic mnemonic device from algebra class: Please Excuse My Dear Aunt Sally. The first letter of each word in this phrase represents the order of operations: parentheses, exponents, multiplication, division, addition, and subtraction.
But mnemonics isn't just for the classroom. Various mnemonic strategies may improve memory in older adults and in people with Alzheimer's.
Maintaining your memory is key to your health and well-being. But mild forgetfulness is part of the aging process. Luckily, several activities and lifestyle changes may protect and improve your memory. Strategies range from adopting a healthy diet to practicing cognitive training. If you notice a major decline in your memory, speak with a healthcare provider who can work with you on a treatment plan.
Anand, K. S., et al. (2012). Hippocampus in health and disease: An overview. Annals of Indian Academy of Neurology.
Attuquayefio, T., et al. (2016). A high-fat high-sugar diet predicts poorer hippocampal-related memory and a reduced ability to suppress wanting under satiety. Journal of Experimental Psychology: Animal Learning and Cognition.
Babaei, P., et al. (2022). Exercise training improves memory performance in older adults: A narrative review of evidence and possible mechanisms. Frontiers in Human Neuroscience.
Berk, L., et al. (2018). Nuts and brain health. Journal of the Federation of American Societies for Experimental Biology.
Booker, H., et al. (2019). The relationship between the frequency of number-puzzle use and baseline cognitive function in a large online sample of adults aged 50 and over. International Journal of Geriatric Psychiatry.
Bratman, G. N., et al. (2019). Nature and mental health: An ecosystem service perspective. Science Advances.
Cowan, N. (2014). Working memory underpins cognitive development, learning, and education. Educational Psychology Review.
Di Liegro, C. M., et al. (2019). Physical activity and brain health. Genes.
Erickson, K. I., et al. (2011). Exercise training increases size of hippocampus and improves memory. Proceedings of the National Academy of Sciences of the United States of America.
Fissler, P., et al. (2018). Jigsaw puzzling taps multiple cognitive abilities and is a potential protective factor for cognitive aging. Frontiers in Aging Neuroscience.
Goukasian, N., et al. (2019). Cognitive correlates of hippocampal atrophy and ventricular enlargement in adults with or without mild cognitive impairment. Dementia and Geriatric Cognitive Disorders Extra.
Huntley, J., et al. (2018). Working memory task performance and chunking in early Alzheimer's disease. British Journal of Psychiatry.
James, P. D., et al. (2011). Late-life social activity and cognitive decline in old age. Journal of the International Neuropsychological Society.
Jones, W. E., et al. (2021). Preserving prospective memory in daily life: A systematic review and meta-analysis of mnemonic strategy, cognitive training, external memory aid, and combination interventions. Neuropsychology.
Kennedy, M. B. (2016). Synaptic signaling in learning and memory. Cold Spring Harbor Perspectives in Biology.
Kletzel, S. L., et al. (2021). Effectiveness of brain gaming in older adults with cognitive impairments: A systematic review and meta-analysis. Journal of the American Medical Directors Association.
Loma Linda University School of Medicine. (2022). Using mnemonic devices to make memorization easier.
Lucey, B. P., et al. (2021). Sleep and longitudinal cognitive performance in preclinical and early symptomatic Alzheimer's disease. Brain.
Luders, E., et al. (2009). The underlying anatomical correlates of long-term meditation: Larger hippocampal and frontal volumes of gray matter. NeuroImage.
Martínez García, R. M., et al. (2018). Nutrition strategies that improve cognitive function. Nutrición Hospitalaria.
MedlinePlus. (2022). Memory loss.
MedlinePlus. (2022). Water in diet.
Moscovitch, M., et al. (2017). Episodic memory and beyond: The hippocampus and neocortex in transformation. Annual Review of Psychology.
Mrazek, M. D., et al. (2013). Mindfulness training improves working memory capacity and GRE performance while reducing mind wandering. Psychological Science.
Murman, D. L. (2015). The impact of age on cognition. Seminars in Hearing.
National Academies of Sciences, Engineering, and Medicine. (2004). Report sets dietary intake levels for water, salt, and potassium to maintain health and reduce chronic disease risk.
National Center for Complementary and Integrative Health. (2022). Antioxidants: In depth.
National Center for Complementary and Integrative Health. (2022). Qigong: What you need to know.
National Institute on Aging. (2020). Memory, forgetfulness, and aging: What's normal and what's not?
National Institute of Neurological Disorders and Stroke. (2022). Brain basics: Understanding sleep.
Pross, N.,(2017). Effects of dehydration on brain functioning: A life-span perspective. Annals of Nutrition and Metabolism.
Savulich, G., et al. (2017). Cognitive training using a novel memory game on an iPad in patients with amnestic mild cognitive impairment (aMCI). International Journal of Neuropsychopharmacology.
Schertz, K. E., et al. (2019). Understanding nature and its cognitive benefits. Current Directions in Psychological Science.
Spira, A. P., et al. (2014). Impact of sleep on the risk of cognitive decline and dementia. Current Opinion in Psychiatry.
Stickgold, R., et al. (2007). Sleep-dependent memory consolidation and reconsolidation. Sleep Medicine.
Subash, S., et al. (2014). Neuroprotective effects of berry fruits on neurodegenerative diseases. Neural Regeneration Research.
Wittbrodt, M., et al. (2018). Dehydration impairs cognitive performance: A meta-analysis. Medicine & Science in Sports & Exercise.
Zhaoyang, R., et al. (2021). Daily social interactions related to daily performance on mobile cognitive tests among older adults. PLoS One.
Zlotnik, G., et al. (2019). Memory: An extended definition. Frontiers in Psychology.