By James LaValle, R.Ph, ND, CCN

Looking back at 2008, I vote for vitamin D as the biggest nutrition news of the year. We all knew vitamin D was needed for optimal bone formation and maintenance, but I don’t think anyone really appreciated its full importance for our health. From cancer to heart disease prevention to protection against autoimmunity¹, vitamin D may very well be the most important nutrient to get enough of.

With all the new information on its disease-preventing benefits, many researchers suggest that the Daily Recommended Intake (DRI) for vitamin D should be raised from 400 IUs to a minimum of 1000 IUs.² And further studies have found that toxicity is really a non-issue.7 So, no longer are we disputing that the DRI is far too low. Instead, the focus has turned to making sure you are getting enough.

Most of us know that vitamin D is made from cholesterol in the body. Sun exposure is the catalyst that makes this happen. When sun hits the body, cholesterol in the skin is converted to vitamin D. To get enough vitamin D, we are told that we need from 5 to 30 minutes of sun exposure between 10 AM and 3 PM at least twice a week to the face, arms, legs, or back — without sunscreen.³ But that’s only if you live below the 42° latitude marker. (In the US, that line runs from Northern California to Boston.)

But even that may not be enough. In my practice I have noticed that many of our patients, even those who live in sunny climates like Florida and get plenty of sun, still have low serum vitamin D levels when we test them. A new study out of the University of Wisconsin found similar results; when they tested young adults who live in Hawaii and were getting plenty of sun exposure, 51% came back with low serum levels.⁴

If you don’t have accessibility to sunlight year-round or even if you do, what should you do?

Those living in Japan may have one answer. Even though they have limited exposure to sunlight, their cancer incidence is quite low due to a diet high in fatty fish — a good source of vitamin D.⁵ Individuals living in Sweden may have an even better solution. A study of middle-aged and elderly Swedish women found that those who took vitamin D supplements and ate 2 to 3 servings of fatty fish per week increased their vitamin D stores by 45%! ⁶

Cod liver oil is the best source of vitamin D, but other oily fish such as salmon, mackerel, tuna, and sardines are good options too.³ (Fortified dairy is also a source, but would not be acceptable for those of you who have chosen to remove dairy from your diet.)

(Source: http://ods.od.nih.gov/factsheets/vitamind.asp#h3).

Of course anytime fish consumption is recommended, there is always the mercury concern. Although that is a concern, studies still show that a couple of servings of fish per week seem to have more benefits than risks.

In the end, I believe we will find that we need both sunlight and dietary sources to hit every nuance of optimal vitamin D intake, because that’s the cycle found in nature — sun in combination with fish. So when it comes to having optimal vitamin D stores, get some sunlight when you can. However, monitor blood levels and if they are not at least 25 ng/mL or above, eat fatty fish or cod liver oil in combination with vitamin D3 supplements to keep your levels high enough. If you don’t like fish, use supplements alone. Just be sure you are getting enough!

References

1. Hayes CE, et al. Cellular and Molecular Biology. 2003; 49(2): 277-300.
2. Grant WB and Holick MF. Altern Med Rev. 2005 Jun;10(2):94-111.
3. http://ods.od.nih.gov/factsheets/vitamind.asp#h3
4. Binkley N, et al. J Clin Endocrin and Metab. 92(6): 2130-2135.
5. Nakamura K. Nutrition. 18(5):415-16.
6. Burgaz A, et al. Am of Clin Nutr. 2007 Nov 86(5):1399-404.
7. Vieth R. Am J Clin Nutr. 1999;69:842-856.

[Ed. Note: James LaValle is the founding Director of the LaValle Metabolic Institute, one of the largest integrative medicine practices in the country. Dr. LaValle is the author of The Metabolic Code Diet: Unleashing the Power of Your Metabolism for Lasting Weight Loss and Vitality and the Executive Editor of THB's The Healing Prescription. Let 2009 be the year to unleash the power of your metabolism. To sign up for "free" access to this exclusive, insider teleconference with Dr. LaValle, click here.]

This article appears courtesy of Early to Rise’s Total Health Breakthroughs offering alternative solutions for mind, body and soul. For a complimentary subscription, visit http://www.totalhealthbreakthroughs.com