{"id":966,"date":"2014-09-09T07:00:35","date_gmt":"2014-09-09T11:00:35","guid":{"rendered":"https:\/\/www.chaneyhealth.com\/healthtips\/?p=966"},"modified":"2014-09-08T23:15:54","modified_gmt":"2014-09-09T03:15:54","slug":"omega-3s-slow-cognitive-decline","status":"publish","type":"post","link":"https:\/\/www.chaneyhealth.com\/healthtips\/omega-3s-slow-cognitive-decline\/","title":{"rendered":"Do Omega-3s Slow Cognitive Decline?"},"content":{"rendered":"<h2 style=\"text-align: center; color: #339966;\">Why Omega-3s Should Be Part Of Your Holistic Brain Health Program<\/h2>\n<h3 style=\"text-align: center; color: #444444;\">Author: Dr. Stephen Chaney<\/h3>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/Omega3-Cognitive-Decline.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-973\" src=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/Omega3-Cognitive-Decline.png\" alt=\"Omega3-Cognitive-Decline\" width=\"273\" height=\"264\" \/><\/a>Who wouldn\u2019t want to avoid dementia and Alzheimer\u2019s in our later years? There is a ton of advice on the internet about \u201cmagic\u201d solutions to keep our brains sharp well into our 90s. Unfortunately, most of that advice is contradicted by other claims on the internet that those solutions don\u2019t work. What should a person do if they want to keep their brain healthy?<\/p>\n<p>Two weeks ago I talked about a study showing that a holistic approach, which to me includes healthy diet, weight control, exercise, supplementation, socialization and memory training, significantly reduces cognitive decline in the elderly (<a title=\"Is There Hope For Alzheimer's\" href=\"https:\/\/www.chaneyhealth.com\/healthtips\/hope-alzheimers\/\" target=\"_blank\">Is There Hope For Alzheimer&#8217;s?<\/a>).<\/p>\n<p>Last week I sorted out the conflicting advice about B vitamins and cognitive decline (<a href=\"https:\/\/www.chaneyhealth.com\/healthtips\/b-vitamins-slow-cognitive-decline\/\" target=\"_blank\">Do B Vitamins Slow Cognitive Decline?<\/a>). More importantly, I told you who would benefit from B vitamin supplementation and who would not.<\/p>\n<p>In part three of this series I\u2019m going to help you sort out the conflicting information on omega-3s and cognitive decline. Then I will sum up what a holistic brain health program might look like for you.<\/p>\n<h3 style=\"text-align: center; color: #3366ff;\">Why Might Omega-3s Slow Cognitive Decline?<\/h3>\n<p>There are lots of reasons to believe that omega-3 fatty acids are important for brain health and might, therefore, slow cognitive decline. For example:<\/p>\n<p>Omega-3 fatty acids improve blood flow to the brain.<\/p>\n<p>The omega-3 fatty acid DHA is an important part of the myelin sheath, the protective coating for every neuron in our body.<\/p>\n<p>DHA is also converted to a neuroprotective agent that protects the brain from oxidative stress.<\/p>\n<h3 style=\"text-align: center; color: #3366ff;\">The Confusing Evidence About Omega-3s And Cognitive Decline<\/h3>\n<p>The data about omega-3s and cognitive function to date have been confusing. Most observational studies have reported better cognitive functioning and lower incidence of Alzheimer\u2019s disease in populations that consume large amounts of fatty fish rich in omega-3s. There is also some evidence that omega-3 supplementation improves cognitive function for patients with mild cognitive impairment or very mild Alzheimer\u2019s disease. However, most short-term, randomized, placebo-controlled studies have found no effect of omega-3 supplementation on cognitive functioning for patients who already have mild to moderate Alzheimer\u2019s disease.<\/p>\n<p>It had been assumed for years that by the time one already had Alzheimer\u2019s it was too late for omega-3s to exert a protective effect. However, some recent studies have suggested a possible genetic explanation for the conflicting information on omega-3s and cognitive decline.<\/p>\n<p>There is a genetic variant of the ApoE gene called ApoE4 that dramatically increases the risk of Alzheimer\u2019s disease. Around 20-25% of the general population and 40-50% of Alzheimer\u2019s patients have this genotype. Several recent studies have suggested that omega-3s may protect against cognitive decline only in people who do not carry the ApoE4 genotype. The current study (Daiello et al, Alzheimer\u2019s &amp; Dementia, doi: 10.1016\/j.jalz.2014.02.005) was designed to test this hypothesis.<\/p>\n<h3 style=\"text-align: center; color: #3366ff;\">Do Omega-3s Slow Cognitive Decline?<\/h3>\n<p>This was a very well designed study. The investigators enrolled 819 older adults (average age 75, range 55-90) in the study and followed them for 3 to 4 years. 229 of the participants had normal cognition at enrollment, 337 had mild cognitive impairment and 193 had Alzheimer\u2019s disease. All participants were tested for ApoE genotype.<\/p>\n<p>The study participants were tested at baseline and every 6 months with two tests of cognitive function &#8211; the Alzheimer\u2019s Disease Assessment Scale (ADAS) and the <a href=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/fish-oil-benefits.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-974\" src=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/fish-oil-benefits.png\" alt=\"fish-oil-benefits\" width=\"276\" height=\"215\" \/><\/a>Mini-Mental State Examination (MMSE). MRI tests were also done at baseline and every 6 months to assess brain volume.<\/p>\n<p>The participants were asked about fish oil supplement use at each of those times. Only those who reported taking fish oil supplements at every examination were considered fish oil supplement users (117), and only those who never consumed fish oil supplements were considered non-users (682).<\/p>\n<p>The results were pretty interesting:<\/p>\n<ul>\n<li>Fish oil supplements significantly decreased cognitive decline and brain shrinkage in the ApoE4 negative population, but not in the ApoE4 positive population.<\/li>\n<\/ul>\n<ul>\n<li>The beneficial effects of fish oil supplementation were only seen in the population with normal cognition at the time the study started. Those benefits were not significant in the populations with mild cognitive impairment or Alzheimer\u2019s disease.<\/li>\n<\/ul>\n<ul>\n<li>Unfortunately, the study was not large enough to perform a statistic analysis of the ApoE positive and negative subpopulations of the groups with mild cognitive impairment or Alzheimer\u2019s disease, so it was not possible to tell whether omega-3s might have been beneficial in people with mild cognitive impairment or Alzheimer\u2019s disease who are ApoE4 negative.<\/li>\n<\/ul>\n<p>The authors concluded that their results \u201chighlight the need for future research on the effects of long-term fish oil supplement use on cognitive aging and dementia prevention in middle-aged and older adults\u201d.<\/p>\n<p>They also highlighted a major reason why so many previous studies have failed to find a link between omega-3s and cognitive decline when they said \u201cStudies on cognitive aging that don\u2019t screen subjects for ApoE4 are doomed to failure\u201d.<\/p>\n<h3 style=\"text-align: center; color: #3366ff;\">Putting It All Together: Holistic Approaches For Preserving Brain Health<\/h3>\n<p>When I began this series three weeks ago with <a href=\"https:\/\/www.chaneyhealth.com\/healthtips\/hope-alzheimers\/\" target=\"_blank\">Is There Hope For Alzheimer\u2019s?<\/a> , I talked about the importance of holistic approaches. I referred back to a cancer expert who said that he could prove that a holistic lifestyle approach significantly reduced the risk of colon cancer, but he couldn\u2019t prove that any individual lifestyle change had any effect on colon cancer risk.<\/p>\n<p><a href=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/holistic-health-program.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-975\" src=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/holistic-health-program.png\" alt=\"holistic-health-program\" width=\"231\" height=\"231\" srcset=\"https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/holistic-health-program.png 231w, https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/holistic-health-program-150x150.png 150w, https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/holistic-health-program-50x50.png 50w, https:\/\/www.chaneyhealth.com\/healthtips\/wp-content\/uploads\/2014\/09\/holistic-health-program-200x200.png 200w\" sizes=\"auto, (max-width: 231px) 100vw, 231px\" \/><\/a>The situation is very similar when we talk about preserving cognitive function. Over the past three weeks I have identified many things that can reduce the risk of cognitive decline \u2013 healthy diets, exercise, socialization, mental exercise, maintaining a healthy weight, B vitamins and omega-3 fatty acids. If we follow a holistic lifestyle that combines all of these things, we are likely to dramatically increase our probability of maintaining a healthy brain well into our golden years.<\/p>\n<p>However, holistic lifestyle changes are difficult. I know some of you will want to take a simpler approach. You are going to ask:<\/p>\n<p><strong>1)\u00a0 Are there some individual lifestyle changes that are certain to slow cognitive decline on their own?<\/strong><\/p>\n<p style=\"padding-left: 60px;\">The answer is probably not. Maintaining a healthy weight comes close. However, some evidence suggests that it is not obesity itself that increases the risk of dementia. It is the insulin resistance and elevated blood sugar associated with obesity \u2013 and not everyone with obesity has insulin resistance and elevated blood sugar levels. So for some people obesity may not increase their risk of dementia. For those people weight loss might not reduce their risk of dementia.<\/p>\n<p><strong>2)\u00a0 Are there some lifestyle changes I don\u2019t need to make if my diet is OK?<\/strong><\/p>\n<p style=\"padding-left: 60px;\">The study I described in last week\u2019s <a href=\"https:\/\/www.chaneyhealth.com\/healthtips\/\" target=\"_blank\">Health Tips From the Professor<\/a>\u00a0 found that B vitamin supplementation only reduced the risk of cognitive decline for people who were B vitamin deficient.<\/p>\n<p style=\"padding-left: 60px;\">So one might assume that you could get a simple test for B vitamin deficiency and determine whether B vitamin supplementation would be beneficial or not. But which test should you get? Who is at risk? Is it the 5-10% of the population with elevated homocysteine levels, the 10% of the population with a deficiency of methylenetetrahydrofolate reductase (MTHFR), the 25% of the population with low blood levels of B6 or the 40% of the population over 60 with B12 deficiency? We simply don\u2019t know.<\/p>\n<p><strong>3)\u00a0 Is it even worth bothering making lifestyle changes if I\u2019m genetically predisposed to developing Alzheimer\u2019s?<\/strong><\/p>\n<p style=\"padding-left: 60px;\">This week\u2019s study found that omega-3s reduced the risk of cognitive decline only in people who did not have the ApoE4 genotype. Does that mean that you should rush out and test yourself for ApoE4?<\/p>\n<p style=\"padding-left: 60px;\">Here the answer is a clear no. In the first place, we have no idea how the ApoE4 genotype affects the other lifestyle changes that slow cognitive decline.<\/p>\n<p style=\"padding-left: 60px;\">In addition, there is another, very important reason why most experts, including the professor, decline being tested for ApoE4. The ApoE4 genotype dramatically increases your risk of developing Alzheimer\u2019s disease, and there is no proven treatment for reducing that risk if you are ApoE4 positive. Who wants to know that they are at increased risk of developing Alzheimer\u2019s if there is nothing they can do about it?<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: center; color: #3366ff;\">The Bottom Line<\/h3>\n<p>1)\u00a0\u00a0\u00a0\u00a0 This study suggests that supplementation with omega-3s (fish oil) significantly reduces cognitive decline and brain shrinkage in older adults (average age 75).<\/p>\n<p>2)\u00a0\u00a0\u00a0\u00a0 The effect of fish oil supplementation on cognitive decline and brain shrinkage was only seen in people who lacked the ApoE4 genotype. Fish oil supplementation was ineffective in people who were ApoE4 positive.<\/p>\n<p>3)\u00a0\u00a0\u00a0\u00a0 The study showed that fish oil supplementation was effective at reducing cognitive decline and brain shrinkage in older adults with normal brain function who were ApoE4 negative, but the study was not large enough to determine whether it was also effective in older adults with cognitive decline or Alzheimer\u2019s disease who were ApoE4 negative. Further research is needed to clarify this important point.<\/p>\n<p>4)\u00a0\u00a0\u00a0\u00a0 This was a relatively well designed study, but it was a small study. Larger, long-term studies are needed to confirm these results. More importantly, based on the results of this study, future studies will need to screen participants for ApoE4 status to assure that there is a large group of ApoE4 negative participants. This would provide enough statistical power to clearly determine whether fish oil supplementation can also benefit people who already have symptoms of cognitive decline or Alzheimer\u2019s and are ApoE4 negative.<\/p>\n<p>5)\u00a0\u00a0\u00a0\u00a0 Even though ApoE4 status influences the effectiveness of fish oil supplementation on slowing cognitive decline, you probably don\u2019t want to rush out and get yourself tested for ApoE4. We don\u2019t know whether ApoE4 status influences other lifestyle changes that slow cognitive decline. More importantly, the ApoE4 genotype dramatically increases the risk of developing Alzheimer\u2019s disease, and there is currently no proven treatment for reducing that risk if you are ApoE4. Who wants to know that they are at increased risk of developing Alzheimer\u2019s if there is nothing you they do about it?<\/p>\n<p>6)\u00a0\u00a0\u00a0\u00a0 Finally, don\u2019t rely solely on supplementation with B vitamins or omega-3s to reduce your risk of cognitive decline. Your chances of reducing cognitive decline are best with a holistic approach that includes healthy diet, exercise, socialization, mental exercises, maintaining a healthy weight, B vitamins and omega-3 fatty acids.<\/p>\n<p>&nbsp;<\/p>\n<p><em><span style=\"color: #d64514;\">These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure or prevent any disease.<\/span><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why Omega-3s Should Be Part Of Your Holistic Brain Health Program Author: Dr. Stephen Chaney &nbsp; Who wouldn\u2019t want to avoid dementia and Alzheimer\u2019s in our later years? There is a ton of advice on the internet about \u201cmagic\u201d solutions to keep our brains sharp well into our 90s. Unfortunately, most of that advice is &#8230; <a title=\"Do Omega-3s Slow Cognitive Decline?\" class=\"read-more\" href=\"https:\/\/www.chaneyhealth.com\/healthtips\/omega-3s-slow-cognitive-decline\/\" aria-label=\"Read more about Do Omega-3s Slow Cognitive Decline?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[361,366,364],"tags":[],"class_list":["post-966","post","type-post","status-publish","format-standard","hentry","category-current-health-articles","category-healthy-lifestyle-2","category-vitamins-and-health"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Do Omega-3s Slow Cognitive Decline?<\/title>\n<meta name=\"description\" content=\"do omega-3s slow cognitive decline, omega 3 fatty acids,holistic health program, cognitive 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