Omega-3 fatty acids
Tatiana Ayazo/RD.comThe omega-3 fatty acids in fish oil have shown promising brain-building effects. Some studies have suggested people who eat fatty fish high in omega-3s have more gray matter in their brains to keep their minds strong. The thing is, the benefits haven’t held up in large, controlled experiments, says Arjun Masurkar, MD, PhD, a neurologist at NYU Langone’s Center for Cognitive Neurology. For instance, an NIH-backed study of more than 3,500 older adults found that taking omega-3 fatty acids for five years had no effect on cognitive function. Still, there likely isn’t harm in trying. “Omega-3s may have other health benefits that might be indirectly related to the brain, like on the heart. The heart and brain are connected,” says Dr. Masurkar. No need to stop them if you and your doctor have already decided they might be beneficial, just don’t expect a memory miracle. Don't miss these other secrets vitamin manufacturers don't want you to know.
Tatiana Ayazo/RD.comVitamin B12 comes mostly from animal products, so vegetarians and vegans might be low, while other people—especially as they age—have trouble absorbing it. Your brain requires B12 to function correctly, so a deficiency is one of the first things doctors look at for memory problems. (Watch out for these other 11 silent signs you're low on vitamin B12.) If a blood test indicates you’re low, you’ll likely have a hard time getting your daily needs from diet, so you’ll need to take either a B12 shot or at-home supplements to bring your levels back up. A normal level is between 200 and 900 picograms per milliliter, but “even if it’s 300, which is in the normal range, we recommend supplementation,” says neurologist Daniel Kaufer, MD, director of the University of North Carolina’s Memory Disorders program. “It’s not just about how much is enough, but having the optimal level as opposed to normal vs. abnormal.” If you do have a healthy level, though, extra B12 won’t make your memory any stronger.
Tatiana Ayazo/RD.comVitamin E is an antioxidant, protecting your body from free radicals, which are unstable atoms that can wreak havoc on the cells in your brain and other vital organs. “Pathologically low levels can cause problems,” says Dr. Masurkar. (Don't miss these other body signs that warn you you're low on key vitamins.) In theory, it seems like getting more of those antioxidants would protect your brain from the damage contributing to memory loss, but the evidence suggests otherwise. One three-year study linked vitamin E-rich diets to slower cognitive decline, but supplements don’t seem to have the same effect. A later study of more than 6,300 women 65 and up found that taking a 600 IU vitamin E supplement for almost ten years did nothing to improve cognitive function.
Tatiana Ayazo/RD.comResearchers saw promise that this herbal supplement could ward off dementia by improving blood flow to the brain, but the evidence is lacking. The largest clinical trial for gingko biloba, an eight-year study tracking 3,069 elderly adults with no or mild cognitive impairment, didn’t find evidence that supplement prevents or slows down memory loss. While supplementing your diet with vitamins you’d get naturally from food might not do any harm, herbal supplements pose extra risks. For instance, gingko biloba thins the blood and in rare cases could lead to a brain hemorrhage, especially if you’re on other blood-thinning medications like aspirin. “It’s not common, but it underscores the point that although it’s relatively benign, it’s not always benign,” says Dr. Kaufer. Learn about other useless vitamins that can actually be dangerous.
Content continues below ad
Tatiana Ayazo/RD.comAsian (or Panax) ginseng is touted as a memory-protecting supplement on its own or paired with gingko biloba as gincosan. Like the other herb, though, scientific studies haven’t shown much promise. Companies generally imply that because herbal remedies are “natural” they don’t have any risks, but that’s not the case. “Older patients tend to be more sensitive to medications and herbal supplements to begin with,” says Dr. Masurkar. “They’re usually on more medications, so they’re especially at risk of side effects and interactions issues.” Plus, Asian ginseng isn’t regulated by the FDA, so he recommends staying away.
Tatiana Ayazo/RD.comAcetylcholine is a neurotransmitter your brain makes naturally to help learn and remember. Huperzine A, which comes from Chinese club moss, could boost acetylcholine by blocking an enzyme that would otherwise break it down, which is how other common Alzheimer’s medications work. Studies haven’t proven it to help yet, though. “Theoretically it could be true, but we’re not sure of the effects, and dosing of it is unclear,” says Dr. Masurkar. The supplement could mess with your digestive system and heart, so talk to your doctor before you take it. Memorize these 12 vitamin mistakes you didn't know you were making.
Tatiana Ayazo/RD.comYour body naturally produces acetyl-L-carnitine to help turn fat into energy, and early in vitro rat studies sparked hope that the compound could protect brain neurons against Alzheimer’s. Clinical trials haven’t shown the same positive results for memory, though, so Dr. Masurkar says it probably isn’t worth your money. Make sure you don't fall for these vitamin myths doctors want you to stop believing.
Tatiana Ayazo/RD.comThe body produces the steroid dehydroepiandrosterone (DHEA) for a range of functions, including being converted into sex hormones such as estrogen and testosterone. DHEA levels go down with age, so there have been some theories that boosting it with supplements could fight the effects of aging, including memory loss. The supplement did show promise in vitro and in animals, but randomized clinical trials in healthy older adults or those with cognitive impairments haven’t shown consistent memory benefits. Here are more supplements doctors wish women would stop wasting money on.
Content continues below ad
Tatiana Ayazo/RD.comPopping pills isn’t a surefire way to keep your mind sharp, but focusing on other healthy habits can prevent memory loss. Your best bet is to get the nutrients you need from food and not a bottle, so stick to a Mediterranean diet or another eating plan that emphasizes vegetables and healthy fats while cutting down sugar and salt. Keeping both your body and mind active helps, too. “It doesn’t mean you have to do a particular kind of computer activity or crossword, but to engage your mind and learn new things,” says Dr. Masurkar. Adults with strong social networks also tend to have healthier brains, he says, so simply spending time with loved ones can be the best medicine. Plus, try these 36 everyday habits that reduce your risk of Alzheimer's.