{"id":1001,"date":"2026-09-25T21:43:22","date_gmt":"2026-09-25T21:43:22","guid":{"rendered":"https:\/\/alirthmedia.com\/?p=1001"},"modified":"2026-09-25T21:43:22","modified_gmt":"2026-09-25T21:43:22","slug":"common-daily-vitamin-shown-to-slow-aging-process-over-4-year-period-new-harvard-study-confirms","status":"publish","type":"post","link":"https:\/\/alirthmedia.com\/?p=1001","title":{"rendered":"Common daily vitamin shown to slow aging process over 4-year period, new Harvard study confirms"},"content":{"rendered":"

Previous research has linked a common vitamin to a slowdown in aging \u2014 and now a new Harvard study appears to confirm those findings.<\/p>\n

The study, which was published in The American Journal of Clinical Nutrition, found that taking a daily\u00a0vitamin D pill\u00a0prevented telomeres from shortening, a hallmark of aging.<\/p>\n

Telomeres, which are often compared to the plastic tips on the ends of shoelaces, act as \u201cprotective ends\u201d on chromosome strands, according to a Harvard press release.<\/p>\n

As people age, telomeres get shorter, which can increase the likelihood of poor health and mortality, prior studies have shown.<\/p>\n

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Research has also suggested that higher\u00a0levels of vitamin D\u00a0in the blood is linked to longer telomeres.<\/p>\n

In this latest randomized trial, approximately 1,000 people aged 50 and older were divided into two groups \u2014 one group took 2,000 international units (IU) of vitamin D pills each day, and the other group took placebo pills.<\/p>\n

After a four-year period, the people taking vitamin D showed less than half of the telomere shortening than the placebo group.<\/p>\n

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Foods high in vitamin D.bit24 \u2013 stock.adobe.com<\/span><\/figcaption><\/figure>\n
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After a four-year period, the people taking vitamin D showed less than half of the telomere shortening than the placebo group.blackday \u2013 stock.adobe.com<\/span><\/figcaption><\/figure>\n
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Research has also suggested that higher\u00a0levels of vitamin D\u00a0in the blood is linked to longer telomeres.Jacek Chabraszewski \u2013 stock.adobe.com<\/span><\/figcaption><\/figure>\n

The vitamin D group also had fewer\u00a0autoimmune diseases\u00a0and reduced inflammation markers.<\/p>\n

Lead study author JoAnn Manson, professor of medicine at Harvard Medical School, said the findings \u201csuggest a promising role for vitamin D in slowing a pathway for\u00a0biological aging\u00a0and age-related chronic disease.\u201d<\/p>\n

While the researchers were surprised that vitamin D was linked to such substantial protection against telomere shortening, Manson told Fox News Digital, the findings are consistent with previous evidence.<\/p>\n

\u201cVitamin D tamps down inflammation, a major cause of telomere shortening and chronic diseases of aging,\u201d she said.<\/p>\n

Vitamin D recommendations<\/strong><\/h2>\n

The question of what constitutes an \u201cadequate\u201d blood level of vitamin D is a \u201ccontroversial topic,\u201d according to Manson.<\/p>\n

In the study, the team found that 2000 IU per day was \u201cvery safe,\u201d without side effects or adverse events.<\/p>\n

\u201cBlood levels for deficiency and recommended blood levels vary across organizations, labs and countries, which is one of the reasons for doubt about the test\u2019s usefulness,\u201d Manson said.<\/p>\n

The U.S. Preventive Services Task Force and most professional societies in the U.S. do not recommend universal screening for vitamin D blood levels or routine use of\u00a0vitamin D supplements, the researcher pointed out.<\/p>\n

\u201cVitamin D tamps down inflammation, a major cause of telomere shortening and chronic diseases of aging.\u201d<\/p><\/blockquote>\n

\u201cThe National Academy of Medicine recommends 600 IU of vitamin D per day for adults up to age 70 and 800 IU\u00a0above age 70, stating that these intakes will meet the requirements of the large majority of adults in the population,\u201d she said.<\/p>\n

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\"Woman6<\/span><\/span><\/span><\/a><\/div>
In the study, the team found that 2000 IU per day was \u201cvery safe,\u201d without side effects or adverse events.okrasiuk \u2013 stock.adobe.com<\/span><\/figcaption><\/figure>\n

\u201cHowever, recent guidelines from the Endocrine Society suggest that vitamin D supplements may be helpful for adults aged 75 and older, infants and children, pregnant women, and those with a diagnosis of prediabetes, but they don\u2019t specify a specific dose.\u201d<\/p>\n

For anyone who has concerns about getting adequate vitamin D from their diet and\/or time outdoors, Manson said that supplementation with 1000 to 2000 IU\/day of vitamin D would be \u201cvery reasonable.\u201d<\/p>\n

\u201cIn the U.S., foods such as dairy products, cereal and orange juice are often fortified with vitamin D, so checking nutrition labels can help you make better decisions about\u00a0which foods\u00a0to purchase,\u201d she advised.<\/p>\n

\u201cFatty fish, such as salmon, sardines and tuna, and wild mushrooms are other sources.\u201d<\/p>\n

Groups at high risk for vitamin D deficiency include those living in nursing homes, people with malabsorption conditions like\u00a0Crohn\u2019s or celiac disease, those being treated for osteoporosis or other bone health problems, and those with major dietary restrictions, such as severe lactose intolerance, according to Manson.<\/p>\n

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\"Oil6<\/span><\/span><\/span><\/a><\/div>
In the study, the team found that 2000 IU per day was \u201cvery safe,\u201d without side effects or adverse events.\u00a0areeya_ann \u2013 stock.adobe.com<\/span><\/figcaption><\/figure>\n
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\u201c[People in these groups] should talk with their doctors about being tested for vitamin D blood levels and taking a vitamin D supplement,\u201d she recommended.<\/p>\n

The doctor noted that people need only small to moderate amounts of vitamin D for\u00a0good health, as the vitamin\u2019s metabolism is \u201ctightly regulated\u201d in the body.<\/p>\n

\u201cMore is not necessarily better, and very high doses \u2014 such as more than 10,000 IU\/d \u2014 may be associated with high blood or urine calcium levels and toxicity,\u201d she cautioned.<\/p>\n

Manson emphasized that taking a supplement is not a substitute for a nutritious diet and healthy lifestyle.<\/p>\n

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\"Woman6<\/span><\/span><\/span><\/a><\/div>
The U.S. Preventive Services Task Force and most professional societies in the U.S. do not recommend universal screening for vitamin D blood levels or routine use of\u00a0vitamin D supplements, the researcher pointed out.\u00a0KMPZZZ \u2013 stock.adobe.com<\/span><\/figcaption><\/figure>\n

\u201cAlthough it\u2019s much easier to pop a pill than to be physically active outdoors and eat healthfully, these lifestyle factors will do more to keep you healthy and lower your risk of\u00a0cardiovascular disease, cancer, type 2 diabetes and other chronic diseases of aging,\u201d she said.<\/p>\n

\u201cMore is not necessarily better.\u201d<\/p><\/blockquote>\n

Going out for a 15-minute walk a few times a week at midday will typically provide enough sunlight exposure for the skin to synthesize vitamin D, Manson added.<\/p>\n

\u201cEven more important for your health would be to\u00a0exercise outdoors, such as brisk walking, jogging or playing sports.\u201d<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Previous research has linked a common vitamin to a slowdown in aging \u2014 and now a new Harvard study appears to confirm those findings. The study, which was published in The American Journal of Clinical Nutrition, found that taking a daily\u00a0vitamin D pill\u00a0prevented telomeres from shortening, a hallmark of aging. Telomeres, which are often compared…<\/p>\n","protected":false},"author":1,"featured_media":1002,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/posts\/1001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1001"}],"version-history":[{"count":1,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/posts\/1001\/revisions"}],"predecessor-version":[{"id":1003,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/posts\/1001\/revisions\/1003"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=\/wp\/v2\/media\/1002"}],"wp:attachment":[{"href":"https:\/\/alirthmedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alirthmedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}