Vitamin D3


“Vitamin D truly is the center of the universe.”
~ Dr. Russell Chesney, professor and chairman of pediatrics at the University of Tennessee Health Science Center in Memphis.

Vitamin D may well be one of the most important supplements you can take for overall health. It’s been “hot” for a while now – all over the news, with stories gushing about it and it’s many benefits.

So what’s the real story? Can vitamin D live up to it’s own hype? Turns out the answer is yes – in fact, it may even exceed it.

The most obvious benefit for D is in relation to bone health – it’s absolutely critical for calcium absorption. But turns out deficiencies of vitamin D have been implicated in diseases from autism to cancer to heart disease and more.

Why Most People Don’t Get Enough Vitamin D

Vitamin D is produced when our skin is exposed to sunlight. But for years now sunlight has been like a bad case of the cooties – something to be avoided at all costs. We stay indoors hooked up to our computers – most of us even exercise inside. And if we do venture out, the Dermatologist gives us strict orders to cover up with clothing or sunscreen.

Unfortunately, vitamin D is one of the few nutrients you can’t enough of through diet. First of all, there just aren’t that many foods that contain vitamin D. Second, those foods that do contain D almost always have it in the form of D2 – a slightly different form than the D3 created by sun exposure that has been shown to be much less beneficial.

No wonder vitamin D deficiency is now considered a worldwide pandemic.

Why You Need Vitamin D

Bone Health Vitamin D may actually be more crucial to bone health than even calcium.  It helps maintain the correct concentration of calcium in the blood, thereby enabling normal bone mineralization. It’s needed for bone growth and bone remodeling. It’s been shown to decrease the risk of falls, fractures and bone loss in elderly patients, to reduce the risk of hip fractures, to improve bone density and to reduce the risk of osteoporosis.

Additional Studies:

3 Year Trial Shows Vitamin D Plus Calcium Increases Bone Mineral Density

More links to research on the link between vitamin D and osteoporosis prevention can be found here.

Heart Health It’s been documented that deaths from heart disease increase with distance from the equator. Blood pressure has also been found to increase with distance from the equator as well as during the winter months. All of which has led to the conclusion by many researchers that vitamin D plays an important role in cardiovascular health. Higher levels of vitamin D have been associated with a substantial decrease in cardiovascular disease. Supplementation with D has been shown to lower blood pressure.

Vitamin D deficiencies are associated with Prehypertension.

You can find a very thorough list of studies on the links between vitamin D and heart disease here.

Diabetes Vitamin D appears to play a role in insulin regulation. Deficiency has been associated with insulin resistanceType I & Type II Diabetes and metabolic syndrome. It’s also linked to poor diabetes control.   Supplementation with vitamin D has been shown to reduce the risk of Type 1 (Juvenile) Diabetes, insulin resistance, and Type II DiabetesThis study found supplementation with D3 to have a positive effect on both First Phase Insulin Secretion as well as insulin resistance, and the authors concluded D3 supplementation to be a valuable part of diabetes treatment.

Diabetic patients with very low levels of vitamin D were found to be at much higher risk from dying of all causes and from cardiovascular disease.

More research on the role of Vitamin D in diabetes can be found here.

Weight Loss If vitamin D plays a role in insulin regulation it makes sense it would have a role in weight loss, right? Turns out it just may. Obese individuals consistently have significantly lower levels of vitamin d than those at a healthier weight. And generally, the higher a person’s BMI (Body Mass Index) the more deficient in D they tend to be. Some scientists have even hypothesized that vitamin D deficiency is the cause of common obesity. Vitamin D supplements don’t effect weight loss automatically or without effort. But a higher level of vitamin D going into a diet has been shown to predict greater success in a weight loss effort, especially in losing abdominal fat. In one study women who took vitamin D along with calcium supplements were significantly less likely to gain weight, and indeed lost more weight than women on a placebo.

Overall Health A 2007 analyses reviewed 18 different trials involving 57,000 people and found that those on vitamin D supplements had a 7% lower risk if death from any cause during the 6 years of the study. In Canada, for example, it has been estimated that increasing the amount of vitamin D in everyone’s blood nationally would save 37,000 lives every year and reduce the economic burden by $14.4 Billion.

Vitamin D Cofactors

No nutrient is a vacuum. Vitamin D requires several other nutrients to operate optimally in the body. Calcium is probably the most obvious. But other nutrients include:

Rag-Tag Research Geek Recommendation

You need a supplement in the form of Vitamin D3, along with calcium, magnesium, zinc, K2 and boron. At this time we have found no single supplement with all of these ingredients. The closest we have found is Calciology™. We recommend taking it along with added zinc, manganese, copper and boron for maximum health. Learn more about Calciology™ by clicking here.


  1. LovingLife says:

    Hi there,
    Prior to finding this site, I ordered Life Extension Bone Restore with Vitamin K2.
    I would appreciate your insight and whether you think this product is a worthwhile product as a Vitamin D supplement.

    Also, I have to take 4000 IU of Vitamin D as my blood levels are low. Do you think that take 4 of these Life Extension(considering it has all the extra ingredients in this bottle) would be okay? Any suggestion would be great!
    Thanks a bunch!

    • Geek 15 says:

      Hey Cheryl! It does appear that the Bone Restore with vit K2 from Life Extension is a pretty decent product, considering it does contain additives and preservatives. It has vitamin D3, which is the form our bodies produce it in, instead of the synthetic version, D2. Same goes for the vitamin K2. The other ingredients all seem to be from a good source as well.

      Now, according to the supplement facts, it recommends you take 4 capsules a day which only contains 1000 IU of the D3. If you need to take more than that, this dosage isn’t likely to work for you. However, we can’t recommend you take more than what the manufacturer suggests. Since we’re not licensed medical professionals, this is definitely something you’ll want to ask you doctor. While the other ingredients are good for those who need it, you certainly don’t want to take too much, or more than you need. If you need 4000 IU of D3 a day, it might be worth looking into a separate vitamin D3 supplement that supports your needs.

      Hope this helps!

  2. Pupcake says:

    How much vitamin D3 is it safe to take? Is it okay to take one a 5,000 UI cap once a day or better to get a lower UI and take the same 5,000 spread throughout the day. I’ve even seen some Vitamin D3 from bio tech that says they are 50,000 UI caps.


    • Geek7 says:

      Hi Pupcake! Vitamin D3 dosage can be a little tricky. According to the Vitamin D Council, a healthy human body utilizes 3000-5000 IU of Vitamin D per day. So it concerns me to hear there are dosages of 50,000 IU out there. (I’ve attached an interesting article for you below).

      Pupcake, here are the warning signs that there is too much Vitamin D3 in your system. Nausea, constipation, loss of appetite, increased thirst, increased urination, unusual tiredness, and even mood/mental changes. It is possible to overdose on Vitamin D3 so use caution in selecting a dosage without the aid of a dietician or physician.

      Some delicious ways to increase Vitamin D3 naturally are fortified dairy products, eggs, and a serving or two of fatty fish. Try adding them to the menu!

  3. marciaflint says:

    I was having a lot of angina-type chest pains & my doctor checked my blood & I was very low in magnesium & also very low in Vitamin D, which ceased when the magnesium levels became normal. I am a 62 yr. old female. Everything else seemed to be at the right levels.Marcia

  4. upastor says:

    How much of the other nutriuents are enough?

    • Geek3 says:

      Hi upastor. It isn’t really an amount of the specific nutrients that you should look for, specifically, but more ratios. Magnesium should be at a 2:1 ratio. Vitamin D ratio is really just the minimum needed based on research. With the Foundation Multivitamin and Calciology together, you don’t really have to do the math. Your fully covered, co-factors and all.

      We have a PDF we compiled with all of the info you ever wanted to know about the co-factors, calcium, and the like.

      I am enclosing the link for you to check out:

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