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Blog posts tagged with 'vitamin D'

Vitamin D3, the Sunshine Vitamin, May Benefit Healthy Vision, Too


Vitamin D3, the Sunshine Vitamin, May Benefit Healthy Vision, TooThanks to ongoing research, the list of benefits to vitamin D3 supplementation just keeps getting longer. In addition to supporting calcium absorption for healthy bones, the immune system, and cellular health, scientists now believe that vitamin D3 may also support eye health.

Animal Studies on Vitamin D3 Show Great Promise

Initial studies conducted on mice have shown that vitamin D3 may help reduce the accumulation of amyloid beta in cone cells inside the retina. The central retina, especially the macula of the eye—which is a region containing yellow pigment cells that filter out harmful blue light—contains a large number of cone cells that are responsible for high-contrast vision. Amyloid beta deposits around the macula may affect blood circulation reaching the cone cells, therefore affecting vision. Mice contain fewer cone cells in their eyes than humans, but small amounts of vitamin D3 were shown to have a significantly large effect in reducing amyloid beta accumulation in their eyes. Given these promising results, researchers believe that the effects of vitamin D3 in human eye health may be far more beneficial.

The Importance of Visual Protection

Age-related macular degeneration (AMD) is the reduction of macular pigment in the retina. It is the leading cause of visual health challenges in adults aged 60 and older. Dietary intake of the carotenoids lutein and zeaxanthin help support macular health, and they are crucial because they are the only two carotenoids capable of filtering blue light rays that may damage the inner rods and cones of the eyes. Bright red and orange fruits and leafy vegetables contain high levels of lutein and zeaxanthin. But poor eating habits may not get you enough of these important carotenoids from your foods, which is why you need to have a healthy balance of fruit and veggies in your meals. Now that you know vitamin D3 may also back up the protection of your macula, consider taking a vitamin D3 supplement, too. Although vitamin D is referred to as the “sunshine vitamin” because your skin produces it when you’re out in the sun, it never hurts to have added protection—especially where your eyes are concerned.



Low Vitamin D Levels May Make Women More Prone to Weight Gain


Low Vitamin D Levels May Make Women More Prone to Weight GainOver the years, scientists have found that low vitamin D levels may negatively affect a number health of areas such as bone strength, the immune system, and cellular health. Now research shows that low vitamin D may also affect body weight.

Low D May Add More Weight

A recent study conducted on over 4,600 women aged 65 and older found that women with lower vitamin D levels were more prone to gain weight. Of the 571 women who gained weight, the scientists observed that women who already had low vitamin D levels going into the study and failed to address their low D levels gained an average of two pounds over five years. The study was published in the June 2012 edition of the Journal of Women’s Health. It echoes the results of a previous study, which found that a combination of vitamin D and calcium supplementation slowed down weight gain.

While researchers aren’t clear yet how vitamin D directly affects weight management, it may have to do with the fact that vitamin D is a prohormone that helps regulate other types of cells. Certain immune cells, for example, need vitamin D to activate them so that they can perform their duties, which is why vitamin D is important to immunity. Similarly, fat cells also have vitamin D receptors, so in women with low vitamin D levels, their fat cells may continue to grow unregulated if there isn’t enough vitamin D to signal the fat cells to “stop.”

How Can You Get More Vitamin D?

Before you think of dosing up on vitamin D to shed pounds, keep in mind that the studies only indicate that low vitamin D makes people more prone to weight gain; taking more won’t help you lose it. That said, however, given how important vitamin D is to your overall health, it can’t hurt to get more of it in your diet. Vitamin D is often called the “sunshine vitamin” because your skin is able to produce it the moment you are exposed to sunlight. Despite this, many people still aren’t getting the recommended daily intake of vitamin D. The Institute of Medicine currently recommends a dosage of 600 IU daily for people aged 1–70. But with more people working in office environments and leading sedentary, indoor lifestyles, higher dosages may be more beneficial. Fatty fish (such as salmon, tuna, and mackerel), beef liver, cheese, and egg yolk are all natural food sources of vitamin D, but they contain very small amounts. That’s why supplements with higher dosages can be a better option to getting the optimal levels you need for good health. As stated earlier, however, increasing your vitamin D levels isn’t a magic bullet to end your weight management worries, so follow it up with healthy diet and exercise habits, too.