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9 Reasons You Need More Vitamin D (Especially This Time of Year)



Why take extra vitamin D? Let us count the ways.

No matter the season, getting adequate vitamin D is critical. One study found that during the winter months, 28 percent of participants were deficient in vitamin D (blood levels of < 20 ng/mL), while 33 percent had insufficient levels (blood levels of 20-29 ng/mL).

And while many people become less concerned about vitamin D after a long summer, thinking the summer sun has corrected any low levels, nothing could be farther from the truth. According to Dr. Jennifer Landa, Chief Medical Officer of BodyLogicMD, “a whopping two-thirds of Americans are not just low on the vitamin – they’re in full-blown deficiency. And a few months of sunshine every 365 days just won’t cut it.”

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From boosting the immune system to protecting against dementia, here are nine reasons it’s important to keep vitamin D levels up.

1. Protect vision: Want to save your vision? One study found that having adequate levels of the sunshine vitamin just may ward off the leading cause of blindness.

2. Reduce back pain: Low vitamin D levels may be responsible for your back pain.  Stewart Leavitt, PhD, Executive Director of Pain Treatment Topics, found that patients with chronic back pain usually had insufficient levels of vitamin D. Funny enough, when they were given adequate vitamin D supplementation, their pain either vanished or was significantly relieved.

3. Skip cold and flu season: Sufficient levels of vitamin D just may help you dodge a cold or flu. Scientists have found that inadequate levels of vitamin D lend to a deficiency in the immune defenses that protect us from infections, neoplasias or autoimmune diseases.

4. Dodge colon cancer: Having sufficient levels of vitamin D may mean life or death if you’re ever diagnosed with colon cancer. In fact, one study found that those with high levels of vitamin D were less likely to ever develop colon cancer, and more likely to survive if the cancer ever did developed.

5. Protect against breast cancer: Women who are genetically susceptible to breast cancer may benefit from higher vitamin D levels, as it interferes with the genetic pathway responsible for these types of tumors.

6. Be happy: You’ve likely heard of Seasonal Affective Disorder, also known as SAD. It’s the condition of feeling depressed and ‘blue’ during the darker winter months, and it’s thought that this is due to lack of the sunshine vitamin. Read up on how low vitamin D levels can impact your mood.

7. Reduce dementia risk: Vitamin D may lower your risk of developing dementia. It is believed that vitamin D helps to transport amyloid beta protein structures across the delicate blood-brain barrier so the clusters can be released for eventual disposal.

8. Improve blood pressure: Even making small improvements in vitamin D status can greatly reduce hypertension risk. In fact, according to one study, for every ten percent increase in vitamin D3 blood concentrations, the risk of developing hypertension decreased by 8.1 percent.

9. Lower heart attack risk: In a 2008 study, researchers found that men who had insufficient levels of vitamin D were twice as likely to have a heart attack than those who had adequate levels of the vitamin.

Vitamin D Deficiency

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4 responses to “9 Reasons You Need More Vitamin D (Especially This Time of Year)”

  1. Lally Moore says:


    I am interested about deficient of Vitamin D. I am 75 years old very active, living in cold state Jersey City.
    My problem is I easily get cold even I am in the house.
    I was advise to move to a hot climate like Arizona.
    However, I am planning to move just to get this
    Vitamin D. Let me know if there is a improvement regarding my health.
    And how many milligrams of vitamin D is required like I 75 years Old like me. Thanks hope you can help me. Thanks

    Lally Moore

    • carol preece says:

      I’m just another old person and I was told a couple of years ago that the optimum level would be 50. This week I inquired how I could be tested to assess my current level of Vitamin D, and the doctor said that Medicare would have to approve the test suggesting that maybe Medicare doesn’t consider it an important part of a fitness routine. I don’t understand why it would not because the cost of the test is about $20. and a proper level protests against some really serious health problems

      • Daniel Russo says:

        Carol, in the winter months if you live in a cold climate you should take a minimum of 2,000 IU of vitamin D3.
        I am 70 years old and have been taking 2,000 IU for the last 20 years. I have never had a cold, flu or any any other illness in this time. I have never had a flu shot either.

  2. Gail Thiessen says:

    We live in the Northern part of BC, Canada, and in winter, get little sunshine, but we take 8000 IU Vitamin D daily, all year round. Any colds we DO get don’t last very long, don’t amount to anything. My husband and I are both in our late 70’s, have NEVER had a flu shot, nor do we intend doing so.