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Vitamin D2 and D3: New Study Results Emphasize the Comparison


Previously, we established the difference between Vitamin D2 and Vitamin D3. The two single forms of vitamin D differ in the way they benefit your health. Made by the body itself, D3 is the more natural, biologically active choice. Though both can have an impact on your health, vitamin D3 is more easily absorbed and the more beneficial of the two, while vitamin D2 leaves behind unnatural breakdown product.

Though some agree that D2 is a viable option, here at Hallelujah Diet we believe that D3 is the more superior of the vitamin Ds. And now, a recent study published in the journal Nutrients has concluded as such.

Vitamin D3 Results 
Researchers from the Technical University of Denmark and the University of Denmark hypothesized that there would be no difference between the dietary consumption of vitamin D3, 25-hydroxyvitamin D3 and vitamin D2. They surmised that each would impact vitamin D status the same. To test their theory, the team of researchers conducted a randomized, crossover study of 12 young, healthy men to determine the bioactivity of the different forms of vitamin D.

For several weeks at a time, the men were given one of the three sources. When the men supplemented with 25-hydroxyvitamin D3, there was an uptick in the status of vitamin D. When they were supplementing with vitamin D2 however, there was a decrease. As a result, the researchers rejected their original hypothesis. In the end, D3 had more of an impact on the body.

Vitamin D3 is the more superior of the two vitamins.Vitamin D3 is the more superior of the two vitamins.

An Ideal Nutrient
As The Global Healing Center detailed, the aforementioned study is far from the first to demonstrate the greater ability and effectiveness of vitamin D3 over vitamin D2. Years of research continue to put D3 in the spotlight as the more ideal nutrient for the body. In fact, it has been demonstrated to have 300 percent more effectiveness functionally, primarily because it is better absorbed by the body.

D3 is created when natural sunshine touches the body’s skin, causing cholesterol to convert into an active form of the vitamin. As Dr. Mercola reported, research has demonstrated that D3 can convert to its active form 500 percent more quickly and be 87 percent more effective at bringing up and holding onto vitamin D levels, which is especially important during the winter months when there is a lack of sunshine.

Sources of Vitamin D
One of the best ways to promote the natural creation of vitamin D3 within the body is to get adequate amounts of sunlight. Even just a few moments out in the sunshine each day can really make a difference. The most common food sources of sufficient vitamin D include animal and dairy products. As such, it’s not always easy for those following a raw lifestyle to get the amount of vitamin D they need.

For those eating a primarily raw, plant-based diet, you may consider supplementing with Vitamin D3 with K2. Boosting cardiovascular and bone health and supporting the metabolism of calcium through the body, D3 and K2 work in tandem to increase the absorption of calcium and then properly deposit that calcium. This synergistic combination can help maintain healthy vitamin D levels. Get your supplements today!


  1. Laurel Kronenberger May 7, 2018

    What kind of Calcium is best to take – Calcium Citrate or Calcium Carbonate? How many milligrams per day? How much of Vitamin D3 should I take per day. I am 72 years of age and have been taking 600 mg. of Calcium Carbonate with breakfast and 600 mg. with dinner along with 800 IU of D3 with breakfast and 800 IU of D3 with dinner. Thank you.

  2. T Black May 7, 2018

    Thank you for helping me to understand the differences between Vitamin D2 and Vitamin D3.

    Most of us are not able to spend enough time in the sun to make a significant difference, so a dependable source through supplementation is essential. I want to make sure I am taking the best.

  3. Annette May 8, 2018

    Thank you for some great information about the Vitamin D3 and the Vitamin D2. I did not realize this about the Vitamin D3 ,” D3 is created when natural sunshine touches the body’s skin, causing cholesterol to convert into an active form of the vitamin. This was some great information we can pass along. I love being outside working in my flower bed doing the spring and summer months. Thanks again!

  4. Jennifer May 10, 2018

    Thanks for this information. It’s great to know the reason why we choose the Vitamin D3 over the Vitamin D2.

  5. This may sound strange, but the only way my fingernails will grow nice and look healthy is if I put my hands out in the sun 3 to 4 times a week (for abut 20 minutes) and let the sunshine on them. The tanning bed does not help them. Taking vitamin D3 doesn’t help them but I take it anyway.

  6. Carolyn B, Calhoun May 31, 2018

    Thanks for clarifying the differences in the D products. I take my D3K2 each day and KNOW it is giving my body the best of benefits of Vitamin D.

  7. Great information on the difference between D3 and D2 it can all be so confusing! Thanks for the clarity!

  8. Janice Brimage February 24, 2020

    When l switched to a plant diet in 2001, l was taking BarleyMax. I have since learned that barley is not recommended for people, like me, who have hypothyroidism. What has your research shown?

    • Melody Hord February 25, 2020

      Per Olin Idol, VP of Health for Hallelujah Diet:
      Quite often when people find barley to be an issue, it is related to the grain which contains gluten. Barley grass juice does not contain any gluten. We have verified this with lab test.

      Folks are sometimes told to avoid certain foods that they consider goitrogens, as they believe it inhibits thyroid function. We have not found these foods to be an issue IF a person has adequate iodine in the diet which supports the thyroid function. The thyroid struggles to make the hormones in a iodine deficient environment. Almost everyone needs iodine supplementation due to the deficiency of iodine in our foods and the importance of iodine for overall health, especially the thyroid, breast tissue, ovaries, prostate and immune system.

  9. It is important for most people to supplement with Vit D3 K2 daily. Most of us do not have the sun exposure on our skin every day for our body to product the amount of Vit D required.

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