{"id":62,"date":"2025-12-30T14:05:52","date_gmt":"2025-12-30T05:05:52","guid":{"rendered":"https:\/\/goodlifetips.co.kr\/?p=62"},"modified":"2026-01-01T19:59:23","modified_gmt":"2026-01-01T10:59:23","slug":"vitamin-d-guide","status":"publish","type":"post","link":"https:\/\/goodlifetips.co.kr\/en\/vitamin-d-guide\/","title":{"rendered":"Do we need vitamin D?"},"content":{"rendered":"
    <\/ol>\n\n\n\n

    Do we need vitamin D?<\/strong><\/h2>\n\n\n\n

    1) Why I get tired in winter<\/strong><\/p>\n\n\n\n

    Some people experience similar patterns every year.
    As the days get colder and the days get shorter, my mood plummets.
    Even after sleeping, I don't feel refreshed, and I feel more and more dazed during the day.<\/p>\n\n\n\n

    I hear people around me ask, \u201cAre you perhaps lacking vitamin D?\u201d and only then do I open the search bar.
    But there is a lot of information, and even more advertising.
    Ultimately, it stops at \u201chow much should I eat?\u201d.<\/p>\n\n\n\n

    <\/p>\n\n\n\n

    2) How can deficiency be confirmed? (Blood test criteria)<\/strong><\/p>\n\n\n\n

    The most commonly used indicator is the blood test '25(OH)D'.
    In the domestic clinical guidelines, a level of 20 ng\/mL or less is considered deficient, and a level of 20\u201330 ng\/mL is considered insufficient.
    Hospital test guidelines also provide reference ranges for 25-OH vitamin D, but interpretation criteria may vary slightly by institution, so it's more practical to consider "test results + lifestyle patterns" together.<\/p>\n\n\n\n

    <\/p>\n\n\n\n

    3) What is the \u201cstandard\u201d daily intake? (Recommended Intake Levels in Korea)<\/strong><\/p>\n\n\n\n

    The Korean Dietary Reference Intake (2020) table suggests that adequate intake of vitamin D is 10 \u03bcg for adults and 15 \u03bcg for those aged 65 and older.
    For reference, 1 \u03bcg is 40 IU, so 10 \u03bcg is equivalent to 400 IU (based on unit conversion).<\/p>\n\n\n\n

    There is one important point here.
    The standard is a \u201cstarting point,\u201d and strategies may vary depending on an individual\u2019s sun exposure, eating habits, and test results.<\/p>\n\n\n\n

    <\/p>\n\n\n\n

    4) Food, Sunlight, and Supplements: Realistic Ways to Fill Up<\/strong><\/p>\n\n\n\n

    Some people say, \u201cJust look at the sunlight,\u201d but it\u2019s difficult to put that into practice every day in our busy lives.
    So, if you divide the approach into three steps, it will be less shaky.<\/p>\n\n\n\n

    First, gradually increase the number of 'D-containing options' in your diet.
    Add blue fish, eggs, and fortified milk (fortified milk, cereal, etc.) to your \u201cfrequently eaten list.\u201d.<\/p>\n\n\n\n

    Second, sunlight is not greedy and only does 'as much as possible'.
    Fitting it into your schedule, like a 10-minute walk during your lunch break, goes a long way.<\/p>\n\n\n\n

    Third, if that's still not enough, consider supplements.
    At this time, the key is to approach vitamin D \u201cconsistently\u201d rather than \u201cin large quantities.\u201d.
    Especially if a deficiency\/insufficient level is confirmed through testing, it is safer to consult with a medical professional to adjust the dosage according to the individual's situation.<\/p>\n\n\n\n

    <\/p>\n\n\n\n

    5) Why overdose should be avoided<\/strong><\/p>\n\n\n\n

    Vitamin D is fat-soluble, so it is best to avoid taking large doses for long periods of time.
    \u201cWhat\u2019s right for me\u201d varies from person to person, and you should be extra careful if you\u2019re taking it with other supplements (such as calcium).
    If possible, it is best to check the direction again after a certain period of time.<\/p>\n\n\n\n

    <\/p>\n\n\n\n

    6) A light ending starting today<\/strong><\/p>\n\n\n\n

    To sum it up, it's simple.
    Check your current status through testing, use the Korean standard (10 \u03bcg for adults, 15 \u03bcg for those 65 and older) as a starting point, and realistically combine diet, sunlight, and supplements.<\/p>\n\n\n\n

    The start you can make today can be small.
    Put eggs in your shopping cart, take a 10-minute walk at lunch, and plan your vitamin D intake \u201con a case-by-case basis\u201d if needed.
    I hope this article helped you organize the complex information.<\/p>","protected":false},"excerpt":{"rendered":"

    Do we need vitamin D? 1) Why do we get tired every winter? Some people experience a similar pattern every year. As the days get colder and the days get shorter, their condition plummets. Sleep doesn't feel refreshing, and they feel more drowsy during the day. Only when people around them ask, "Are you deficient in vitamin D?" do they open the search bar. However, there's a lot of information, and even more ads. Ultimately, they stop at "How much should I take?" 2) How can you detect a deficiency? (Blood test criteria) The most common... Read more<\/a><\/p>","protected":false},"author":1,"featured_media":109,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[206,198,204,210,170,208,197,200,211,203,212,207,202,196,201,173,205,209,199],"class_list":["post-62","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-info","tag-206","tag-198","tag-204","tag-210","tag-170","tag-d","tag-202","tag-196","tag-201","tag-173","tag-205","tag-209","tag-199"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/goodlifetips.co.kr\/wp-content\/uploads\/2025\/12\/pexels-darina-belonogova-7208641-scaled.jpg","_links":{"self":[{"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/comments?post=62"}],"version-history":[{"count":4,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":122,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/posts\/62\/revisions\/122"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/media\/109"}],"wp:attachment":[{"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/media?parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/categories?post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/goodlifetips.co.kr\/en\/wp-json\/wp\/v2\/tags?post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}