3 Great Ways to Boost Your Vitamin D This Winter
(and Why it’s Critical to Your Bone Health)

Updated: January 25, 2022

With winter just around the corner and sunlight becoming scarce, now is the perfect time to be proactive about getting enough vitamin D…

Because when it comes to your bone health, vitamin D deficiency can cause serious problems. Why?

Put simply, vitamin D helps our bones absorb calcium so they can grow and stay strong.1

So even if you’re getting enough calcium, if your vitamin D level is too low, your body won’t be able to absorb it…

Which is why people who don’t get enough vitamin D can experience fatigue, hairline fractures, and even osteomalacia—a condition in which bones become soft, weak, and prone to breakage.1

The number of U.S. adults deficient in Vitamin D is 42%

Are YOU getting enough vitamin D?

According to Cleveland Clinic, 42% of adults in the United States are vitamin D deficient. And that number is even higher in premenopausal women and people who… 

  • Are over age 65
  • Have poor nutrition habits
  • Take prescription medication long term for heartburn, acid reflux, and constipation2

Which leads us to the question…

How much vitamin D do you need?

According to the National Institutes of Health, “The recommended daily amount of vitamin D is 400 international units (IU) for children up to age 12 months, 600 IU for people ages 1 to 70 years, and 800 IU for people over 70 years.”3

But those numbers are only a starting point, because the amount of vitamin D your skin makes in response to sun exposure can vary greatly depending on factors like… 

  • Time of day
  • Season
  • Latitude
  • Your skin pigmentation

In fact, depending on your location and lifestyle, your skin might produce very little vitamin D during the winter months—or even none.  

So with winter just around the corner and the days getting shorter and darker, it’s very important to be proactive about getting enough vitamin D.

Especially because most people not only spend less time outdoors in the winter, but when they do they’re all bundled up. And also because the low angle of the sun during winter means less UV light gets through the atmosphere.4

For example, according to the National Oceanic and Atmospheric Administration (NOAA), during the winter, a midwest state like Michigan typically has a UV index below 2, which NOAA classifies as “low”. But in the height of summer, the UV index can rise above 10, which NOAA classifies as “very high.” 5,6 That’s more than a 500% increase!

So, how can you get more vitamin D during the winter? We’re glad you asked! Here are…

3 Great Ways to Get Enough Vitamin D This Winter

The very first thing you should do is get a blood test to measure your current level of vitamin D. This will help you determine how much more your body needs. Then, to get more of it, you can…

Get outside

The best way to get vitamin D is from the sun. Yes, there’s less of it during the winter months, but every little bit helps.

Salmon is high in Vitamin D and Omega 3 fatty acids

Eat foods high in vitamin D

Foods rich in vitamin D include cold-water fatty fish like wild salmon and tuna, mushrooms, and eggs. (For a list of the top 10 foods rich in vitamin D, see our article called ”The Top Natural Sources of Vitamin D”.)

Take a supplement

There are many vitamin D supplements to choose from, and they can be very effective. However, if you want to maintain or increase your bone density, you can get all 13 essential bone-building minerals and 3 vitamins—including 1600 IU of vitamin D3—in a daily dose of AlgaeCal Plus.

In summary…

Vitamin D is critical not only to bone health, but also to overall health, so make sure you get enough of it. Especially during the winter!

For further reading, visit the following two articles:


  1. https://my.clevelandclinic.org/health/articles/15050-vitamin-d–vitamin-d-deficiency
  2. https://www.cantonmercy.org/healthchat/42-percent-of-americans-are-vitamin-d-deficient/
  3. https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
  4. https://blogs.oregonstate.edu/linuspaulinginstitute/2016/01/25/sunlight-vitamin-d-winter/
  5. https://www.cpc.ncep.noaa.gov/products/stratosphere/uv_index/gif_files/dtw_17.png
  6. https://www.cpc.ncep.noaa.gov/products/stratosphere/uv_index/uv_annual.shtml

Article Comments

Add New Comment

Your email address will not be published.

  1. susie welling

    January 22, 2022 , 9:23 am

    I’ve taken algecal for years. I am out of it and need it.
    I can’t seem to get that across.
    I have my own strontium and when it’s gone I’ll get yours.
    Please help me get algaecal.

  2. Kirby Johnson

    January 24, 2022 , 2:19 pm

    Hi Susie,

    You can place an order for AlgaeCal Plus HERE. If you prefer, you can also order over the phone with our Bone Health Consultants at 1-800-820-0184 (USA & Canada toll-free) 5am – 4pm PST weekdays, 6am – 4pm PST weekends ?

    – Kirby @ AlgaeCal

  3. Dolores McLenon

    January 22, 2022 , 4:22 pm

    I have been taking algaecal and strontium boost for one year. Recently I had a blood clot in my leg and my doctor put me on blood thinners. I read that strontium can cause blood clots and now I am afraid to take any more and quit. The blood clot dissolved from the blood thinner. It caused quite a bit of pain in my leg.

  4. Kirby Johnson

    January 25, 2022 , 11:46 am


    We’re so sorry to hear of the blood clot you’ve been dealing with. While Strontium Ranelate is associated with a small increased risk of blood clots, this hasn’t been found with strontium citrate, the form found in Strontium Boost. In fact, strontium citrate has been shown to be both safe and effective for bone health. We’d encourage you to discuss your blood clot in greater detail with your doctor to discover the root cause. Are you still currently taking your blood thinner? An important consideration while taking AlgaeCal with a blood thinner is to determine if there are any potential interactions with vitamin K2 (present in AlgaeCal Plus). You can call in for more information on both of these topics 😀 You can reach us at 1-800-820-0184 (USA & Canada toll-free) 5am – 4pm PST weekdays, 6am – 4pm PST weekends and you can always leave a voicemail if we’re out of the office!

    – Kirby @ AlgaeCal

  5. Margie Haines

    January 24, 2022 , 8:11 am

    A friend and I were just discussing this. If we need 800 IU of Vit. D and Algaecal provides 1600 IU, a vitamin might have 1000 IU, and we eat healthy with tuna and salmon, then is there a chance that these combined levels become toxic?

  6. Kirby Johnson

    January 25, 2022 , 10:00 am


    We’re glad to hear you’re discussing these questions with your friends! And it’s a great question! Vitamin D3 requirements tend to vary between individuals, but you’d likely benefit from additional vitamin D3 depending on your current vitamin D3 blood levels; it’s estimated that 42% of Americans are vitamin D3 deficient! You can learn more about testing and additional supplementation recommendations HERE. Vitamin D toxicity usually only occurs with extreme dosage (over 10,000 IU). Hope this helps!

    – Kirby @ AlgaeCal

  7. Beverly Northeast

    January 31, 2022 , 6:52 pm

    I need to order strontium citrate
    Please let me know the amount and if it will be delayed as I am completely out of it.
    Didn’t realize I was that low on it.
    Bev northeast

  8. Mary

    February 5, 2022 , 8:48 am

    What happens when you don’t take the doses of Algaecal for a week- my stomach gets toxic once or twice a year and I have to stop taking it. I do take it with food and feel I am not absorbing it.
    Is there anything I can do?

  9. Kirby Johnson

    February 7, 2022 , 10:33 am

    Hi Mary,

    While some people report improvements such as pain relief or feeling stronger, this is an individualized response and may not be the case for everyone. The best way to know you’re properly absorbing AlgaeCal is through the results of a DEXA scan. You can either reach out to us directly, or reference our instructional sheet HERE to verify you’re properly taking our supplements.

    Ceasing to provide your bones with the essential nutrients in AlgaeCal will serve to unbalance your bone-remodelling process and promote bone loss. We don’t anticipate ceasing to supplement with AlgaeCal for a week at a time to have any lasting negative impact on your bone health. We recommend discussing the symptoms of stomach toxicity you’re experiencing with your doctor to address the underlying cause, but it’s unlikely that the short discontinuations you’re engaging in will serve as a major setback in your bone health journey. Please don’t hesitate to call us at 1-800-820-0184 (USA & Canada toll-free) if you have any other questions or concerns.

    – Kirby @ AlgaeCal

  10. Linda Smith

    May 12, 2022 , 10:20 am

    The additional ways to ensure the amount of Vitamin D is essential to calcium absorption.

  11. Patricia Manson

    May 15, 2022 , 5:40 am

    Apparently, it’s a good idea to expose, different sites of skin, rather than just rolling up yr sleeves and baking the forearms, for better absorption and coverage!🌸

  12. Kirby Johnson

    May 18, 2022 , 1:55 pm


    ‘Tis the season! Enjoy all that beautiful sunshine this summer <3

    - Kirby @ AlgaeCal

  13. Sharon Van Boven

    May 15, 2022 , 3:16 pm

    As someone who suffers from severe vitamin D deficiency, this article was very helpful and much appreciated!!

  14. Susan Roth

    May 22, 2022 , 4:32 pm

    The importance of Vitamin D cannot be overstated. Found the food choices very helpful.

  15. Kirby Johnson

    May 26, 2022 , 3:39 pm


    We couldn’t agree more – thank you for taking the time to read through our article! If you’re interested in further reading on vitamin D3 and bone health, you might enjoy our article HERE <3

    - Kirby @ AlgaeCal

  16. Charlie Rogers

    May 26, 2022 , 8:07 am

    Very informative!

  17. Dianna henry

    June 9, 2022 , 7:19 am

    Thanks , I need to be more aware of when I am outside!

  18. Betty Skelding

    June 9, 2022 , 8:06 am

    Thanks Monica‼️ I take my AlgaeCal plus & Strontium Boost plus 2000 D-3 daily ,I am 73

  19. Kirby Johnson

    June 15, 2022 , 10:36 am


    Fantastic work! Keep on loving your bones and please don’t ever hesitate to let us know if we can be of any help along your bone-health journey <3

    - Kirby @ AlgaeCal

This article features advice from our industry experts to give you the best possible info through cutting-edge research.

Prof. Didier Hans
PHD, MBA - Head of Research & Development Center of Bone Diseases, Lausanne University Hospital CHUV, Switzerland,
Lara Pizzorno
MDiv, MA, LMT - Best-selling author of Healthy Bones Healthy You! and Your Bones; Editor of Longevity Medicine Review, and Senior Medical Editor for Integrative Medicine Advisors.,
Dr. Liz Lipski
PhD, CNS, FACN, IFMP, BCHN, LDN - Professor and Director of Academic Development, Nutrition programs in Clinical Nutrition at Maryland University of Integrative Health.,
Dr. Loren Fishman
MD, B.Phil.,(oxon.) - Medical Director of Manhattan Physical Medicine & Rehabilitation and Founder of the Yoga Injury Prevention Website.,
Dr. Carole McArthur
MD, PhD - Professor of Immunology, Univ. of Missouri-Kansas City; Director of Residency Research in Pathology, Truman Medical Center.,