vitamin

Dieting and Vitamin Losses

Did you know when you diet you are frequently sacrificing vitamins and minerals?

When you diet, you don’t just cut calories, you also reduce your intake of vitamins and minerals.

Standford University researchers evaluated the effects of different diets (Atkins, Zone, LEARN, and Ornish) of 300 overweight and obese women. The women reduced their daily caloric intake by 500 calories and all women reduced their overall vitamin and mineral intakes. Vitamin E was reduced the most – 65%.

Researchers were surprised to note that women following the Zone diet actually saw an increase in vitamin A, E, and K intake and no reduction in other nutrients.

When losing weight it’s important to not compromise your overall health. The best bet is a balanced weight loss plan you can stick with long term.

All the best,
Lisa Nelson RD
https://lisanelsonrd.com

Lower Cholesterol Effectively – Zetia Versus Niacin

It often feels like pharmaceutical companies often get wrapped up in dollar signs and forget the bottom-line reason for manufacturing the medication – improving your health. A study compared the effectiveness of Niacin versus Zetia.

The study

The study was published in the New England Journal of Medicine this past November 2009. Researchers analyzed the effect of extended-release niacin and ezetimibe (Zetia) on LDL cholesterol and HDL cholesterol levels.

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Vitamin D Deficiency Symptoms – How does low vitamin D affect your heart?

Lisa Nelson RD #9: Vitamin D Deficiency Symptoms – Is there a connection between vitamin D and heart disease? What level vitamin D should individuals maintain to prevent heart problems?

Dr. Shelby-Lane: It is a known and documented fact that too little Vitamin D puts the heart at risk. Yet many patients are not routinely tested, and if so, they do not take the proper steps to reach optimal Vitamin D levels between 50 to 100 ng/dL. Most lab tests give 30 as a low normal, yet this is not optimal. This can by done by diet, sun exposure (in most cases) or adequate supplementation. But most of all, people are not tested. Research suggests Vitamin D deficiency may be an unrecognized heart disease risk factor.

Researchers say a growing body of evidence suggests that vitamin D deficiency increases the risk of heart disease and is linked to other, well-known heart disease risk factors such as high blood pressure, obesity, and diabetes.

For example, several large studies have shown that people with low vitamin D levels were twice as likely to have a heart attack, stroke, or other heart-related event during follow-up, compared with those with higher vitamin D levels.

“Vitamin D deficiency is an unrecognized, emerging cardiovascular risk factor, which should be screened for and treated,” says researcher James H. O’Keefe, MD, director of preventive cardiology at the Mid America Heart Institute in Kansas City, Mo., in a news release. “Vitamin D is easy to assess and supplementation is simple, safe and inexpensive.”

Most of the body’s vitamin D requirements are met by the skin in response to sun exposure. Other less potent sources of vitamin D include foods such as salmon, sardines, cod liver oil, and vitamin D-fortified foods like milk and some cereals. Vitamin D can also be obtained through supplements.

Vitamin D deficiency is on the rise. Vitamin D deficiency symptoms are traditionally associated with bone and muscle weakness, but in recent years a number of studies have shown that low levels of the vitamin may predispose the body to high blood pressure, congestive heart failure, and chronic blood vessel inflammation (associated with hardening of the arteries). It also alters hormone levels to increase insulin resistance, which raises the risk of diabetes.

In a review article published in the Journal of the American College of Cardiology, researchers surveyed recent studies on the link between vitamin D deficiency and heart disease to come up with practical advice on screening and treatment.

They concluded that vitamin D deficiency is much more common than previously thought, affecting up to half of adults and apparently healthy children in the U.S.

Researchers say higher rates of vitamin D deficiency may be due in part to people spending more time indoors and efforts to minimize sun exposure through the use of sunscreens. Sunscreen with a sun protection factor (SPF) of 15 blocks approximately 99% of vitamin D synthesis by the skin.

“We are outside less than we used to be, and older adults and people who are overweight or obese are less efficient at making vitamin D in response to sunlight,” says O’Keefe. “A little bit of sunshine is a good thing, but the use of sunscreen to guard against skin cancer is important if you plan to be outside for more than 15 to 30 minutes of intense sunlight exposure.”

Testing for Vitamin D Deficiency

Vitamin D levels can be measured with a blood test for a specific form of vitamin D called 25-hydroxy vitamin D (25(OH)D). Vitamin D deficiency is defined as a blood 25(OH)D level below 20 ng/dL. Normal levels are considered to be above 30 ng/dL.

Again, criteria for optimal levels is between 50 to 100 ng/dl.

All the best,
Lisa Nelson RD
Heart Healthy Tips

Questions. . . .

What is one thing you would like to learn about nutrition?  Do you have a question related to heart health, weight loss, or some other nutrition related issue?  Submit your question for possible answer in this blog or The Heart of Health ezine.

Easter is just around the corner.  I hope you all have a great holiday!

Lisa Nelson, RD, LN