by Laurel Sterling, MA, RD, CDN
Vitamin D3 has been a “hot” topic of discussion for the past few years, and the scientific research continues increasing regarding the crucial role it plays in our health and wellbeing. Vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol) are the two vitamin Ds referred to in research and are found in both food and supplements. Vitamin D3 is known as nature’s sunshine vitamin, and is a vitamin we can actually make in our body under proper conditions. Because of this, many believe we receive enough D3, but large-scale studies find deficiency is widespread in adults and children.
Vitamin D3 Benefits
Vitamin D is important for our entire body. Vitamin D receptors are found everywhere from immune cells to the brain. Vitamin D3 promotes healthy growth and development; teeth, bone, and muscle health; healthy immune and cardiovascular systems; and mood health.
Making Vitamin D from the Sun
Our skin contains a precursor to D3, called 7-dehydrocholesterol. When the sun’s UV rays shine on our skin, 7-dehydrocholesterol synthesizes D3, though conditions need to be perfect. Many of us don’t get enough time in the sun to make and maintain adequate 25(OH)D levels (the form made after D3 is converted in the liver and the best indicator of vitamin D status). And if we are in the sun, our body often doesn’t synthesize adequate amounts of vitamin D due to sunscreen, latitude, time of year, color of skin, etc.
Getting Vitamin D through our Diet
There aren’t many naturally occurring dietary sources of vitamin D, which is why many turn to vitamin D supplements to keep their levels up. It can be found in the flesh of fatty fish like salmon (approximately 500 IU (12.5 mcg) in 3 ounces), mackerel, and tuna and in fish liver oil. Some mushrooms provide vitamin D2, which our body still needs to convert to the bioavailable D3 form. Most of the dietary vitamin D comes from fortified foods such as orange juice, non-dairy beverages, egg yolks (from D3 supplemented hens), and some dairy (milk, yogurt, and cheese).
Supplementing with Vitamin D3
The recommended daily intake of vitamin D3 varies widely across organizations. The Institute of Medicine (IOM) Food and Nutrition Board RDA’s are the official recommendations for the US. Their latest recommendations are 400 IU (10 mcg) per day of vitamin D3 for infants, 600 IU (15 mcg) per day for children over 1 years old, and 600 to 800 IU (15 to 20 mcg) per day for adults.
The Vitamin D Council, Endocrine Society, and many physicians feel these recommendations are too low and are requesting they be increased. The IOM states adult sufficiency of vitamin D3 levels is 20 ng/ml, the Endocrine Society says 30 to 100 ng/ml and the Vitamin D Council says 40 to 80 ng/ml.
The amount necessary to increase and maintain our D levels is different from everyone and varies throughout the seasons. Make sure to get your levels tested regularly and adjust supplementation accordingly. Research has found that vitamin D3 is the preferred form to supplement with in order to increase levels effectively.
by Jolie Root, LPN, LNC
I visit dozens of natural food stores and pharmacies every year and attend a number of conferences and trade shows. I’m always asked, which is best: cod liver oil or fish oil. It’s a great question. Here are my thoughts…
Cod liver oil and fish oil are both great sources of omega-3s. Here’s the difference – cod liver oil also provides vitamins A and D3. This is the main distinction between the two. So what’s best for your family? I ask three questions.
by Karen Roth, MSNC
May is Osteoporosis Awareness Month – and there’s no better time to talk about preserving our bone health.
First, let’s start with the offenders. The Standard American Diet (SAD) consists of highly acidic foods and beverages. These include lunch meat, beef, pork, sausage, hot dogs, potato chips, crackers, white pasta, hard cheese, and sugary foods (like cookies, ice cream, sodas, and candy), plus beer and artificial sweeteners. And this is the short list. When our body is heavy on the acidic side, calcium (and some magnesium) is needed to neutralize the acidity to bring our body back into balance. But our body may be pulling it from our bones.
Since we can’t eliminate acidic foods forever, it’s beneficial to include more alkaline foods while consuming acidic foods. These foods include all leafy greens and lettuce of all types, lemons, limes, garlic, herbal teas, broccoli, asparagus, Brussels sprouts, and olive oil (to name a few). If you’re making a ham sandwich, instead of having a side of potato chips, make a side salad using lettuce or spinach, and include cucumbers and radishes then drizzle it with extra virgin olive oil and a squeeze of lemon juice. Every ingredient in the side salad is very alkaline.
Vitamin D’s role in helping to maintain healthy bones is no secret. The best way to ensure our body receives optimal levels of vitamin D is sun exposure for 10 to 15 minutes daily, without sunscreen and with half of our body exposed (a t-shirt and shorts would accomplish this). If this isn’t possible, especially for those of us in seasonal or cooler climates, the next best option is a vitamin D3 supplement. Since the amount we need is dependent on our current levels, it’s best to have a physician test our vitamin D3 levels. In the US, a normal reference range is 30 to 100, but some experts believe 50 to 100 is more optimal.
Another key component to maintaining strong, healthy bones is exercise. Weight-bearing exercises (like walking or jogging) are outstanding choices. If walking or jogging isn’t appealing, there are so many other choices. Enroll in a dance class, find a pickle ball group, or join a meet-up for hikers. There are other benefits to exercise, such as increased coordination and balance, which can help prevent a fall.
The Daily Dose blog features health and wellness articles from Senior Nutritionist & Educator Jolie Root, LPN,LNC; Nutritionist & Educator Laurel Sterling, MA, RDN, CDN; and Featured Guest Blogger Karen Roth, MSNC. Other guest bloggers will also join us.
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