Did you know that even if you stand outside in the sun chances are you don't absorb very much because you're wearing sunglasses and SPF sunblock which limits Vitamin D from entering your body?
Did you know common symptoms of vitamin D deficiency are muscular weakness, feeling of heaviness in the legs, chronic musculoskeletal pain, easy tiring, fatigue, and low mood in the darker/dreary seasons?
Did you know that optimal levels of Vitamin D 'may' help with some cancers, the flu, autism, asthma, multiple sclerosis and cardiovascular disease in addition to curing rickets and osteomalacia?
Do you know what your Vitamin D levels are?
A most brilliant article came out in the March 2008 Alternative Medicine Review entitled, Use of Vitamin D in Clinical Practice by Dr. John Cannell and Dr. Bruce Hollis. According to the authors, healthy humans should be supplemented with enough vitamin D or exposed to enough ultraviolet B (UVB) radiation to achieve 25(OH) vitamin D levels of 40-70 ng/mL year-round.
But I get plenty of sun-time, you say?
Factors affecting UVB exposure and the skin's production of Vitamin D include latitude, season of the year, time of day, air pollution, cloud cover, melanin content (how dark is your skin), use of sunblock, age, obesity, and the extent of clothes covering your body.
Because melanin in the skin acts just like a sunscreen, dark-skinned individuals need much longer UVB exposure than fair-skinned folks. Also, body fat absorbs vitamin D right into those fat cells without letting the rest of the body use this great hormone.
Okay, I get it
Ask your doctor for a 25,OH Vitamin D test (do NOT get the 1,25,OH vitamin D test). Optimal levels are between 40-70 ng/mL although many researchers and clinicians aim for above 50 ng/Ml.
What if I am deficient?
Many health providers who do not know about vitamin D will worry about vitamin D toxicity which is second to an elevated level of calcium in your body. This is VERY uncommon but begins to occur when your vitamin D levels reach and exceed 150 ng/ml. Remember, you want to be somewhere between 40-70 ng/mL.
Keeping in mind your risk of skin cancer, getting outside and enjoying the sun in small increments without sunblock is a great way to increase your levels. Once you get a bit of unblocked sun...you can rub on your SPF sunscreen and/or cover-up and continue with your activity.
If you plan on taking vitamin D supplements, always do so under the supervision of a healthcare provider and make sure you are monitoring your vitamin D and serum calcium levels every 3-4 months when taking higher levels. Make sure your supplement is D3 or cholecalciferol and NOT the inferior form D2 or ergocalciferol. D2 (ergo) is not human vitamin D, acts much weaker, is not normally present in humans, and produces metabolic by-products not normally found in humans.
Before you go supplementing with vitamin D above 2000 IU/day, get your labs done and talk with a healthcare provider who is skilled at the ins and outs of this powerful vitamin hormone.
Three cheers for Vitamin D!
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