About Vitamin D Deficiency - Sperti D/UV-F Lamp
Vitamin D Links

An Ultraviolet Option for natural Vitamin D production.
The Vitamin D Lamp, model D/UV-F:
Our Vitamin D Lamp is a UV Sunlamp that will naturally increase vitamin d levels in the body with brief exposure sessions no more than five mintues. A brief summary of our Vitamin D Lamp, model D/UV-F is below, to read more details & specifications you may go directly to the Vitamin D Lamp page.  If you wish, move to the D/UV-f Vitamin D Lamp info & ordering page click HERE

Video Links
These are three YouTube videos showing our three SPERTI UV Lamps:

YouTube video featuring our D/UV-F Vitamin D Lamp:   http://youtu.be/Tuf7MmcTWQw

YouTube video featuring our Fiji Sun Tanning Lamp:  http://youtu.be/uT142wWC0cI

YouTube video featuring our Cooper Hewitt PH-36F Psoriasis Lamp:  http://youtu.be/3YWvaAp40Hw

sperti logo small
Visit our official Sperti.com website at www.SPERTI.com

grassroots logo 2
Visit the Grassroots Health website - click here.




Dr. Holick has a new website - click here to view www.DrHolick.com

Dr. Michael Holick is one of the top Vitamin D researchers in the world.

Dr. Holick's popular books are all available on Amazon.com

Vitamin D Council logo

Visit the Vitamin D Coucil website - click here.

Official European vitamin D upper levels: 4000 adult – July 2012

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Death due to cystic fibrosis reduced about 4X due to 250000 IU of vitamin D – RCT June 2012


VITAMIN D in a nutshell - a simple graphic

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YouTube video by the Sunlight Forum and including Dr. Pavel:


SRF Main (international start) Page:

SRF Main CMS Page


Did You Know?

The sun outshines food as your best source of Vitamin D. 

To get the Vitamin D value of ten minutes' exposure to sunlight, you would have to eat:

  • 6 1/2 pounds of shiitake mushrooms or
  • 150 egg yolks or
  • 3 3/4 pounds of fresh farmed salmon or
  • 30 servings of fortified cereal or
  • 2 1/6 pounds of sardines or
  • 30 cups of fortified orange juice

SOURCE:  Michael F. Holick, Ph.D., M.D., the Vitamin D, Skin, and Bone Research Laboratory, Boston University Medical Center, Boston, MA.


Does UV Exposure Decrease the Risk of Melanoma?

Recent studies have shown that moderate UV exposure may reduce the risk of melanoma.

Read more


Vitamin D Linked to Successful Weight Loss with Dieting

Increased intakes of Vitamin D may improve weight loss while following a calorie-restricted diet, according to new findings. 

For every increase of 1 ng/mL in level of 25-hydroxycholecalciferol - a measure of vitamin D status - subjects ended up losing almost 1/2 lb. more on their calorie-restricted diet, suggest findings presented at the Endocrine Society's 91st Annual meeting in Washington, DC. 

Furthermore, for each 1-ng/mL increase in the active form of vitamin D (1,25-dihydroxycholecalciferol) subjects lost 4 oz. more. 

"Our results suggest the possibility the the addition of vitamin D to a reduced-calorie diet will lead to better weight loss" said the study's lead author, Shalamar Sibley, M.D., from the University of Minnesota. 

With obesity rates high - not only in developed countries but also, increasingly, in newly wealthy emerging markets, there is considerable attention to ways to trim down waistlines. 

The Details on D

Vitamin D refers to two biologically inactive percursors - D3, also known as cholecalciferol, and D2, also known as ergocalciferol.  The former, produced in the skin on exposure to UVB radiation (to 320 nm), is said to be more bioactive. 

While our bodies do manufacture Vitamin D on exposure to sunshine, the levels in some northern countries are so weak during the winter months that our body makes no vitamin D at all, meaning that dietary supplements and fortified foods are seen by many as the best way to boost intake of vitamin D. 

In adults, it is said vitamin D deficiency may precipitate or exacerbate osteopenia, osteoporosis, muscle weakness, fractures, common cancers, autoimmune diseases, infectious diseases and cardiovascular diseases. There is also some evidence that the vitamin may reduce the incidence of several types of cancer and type-1 diabetes. 

Study Details

Sibley and her co-workers said that previous studies had reported an association between vitamin D deficiency and obesity, but "it is not clear if inadequate vitamin D causes obesity or the other way around", she said. 

The Minnesota based researchers recruited 38 overweight men and women and assigned them to a calorie-restricted diet, which provided 750 calories a day fewer than their estimated total needs for 11 weeks.  Blood levels of vitamin D were measured before and after the 11 week period. 

Sibley told attendees in Washington, DC that, on average, many of the subjects were vitamin D insufficient.  Moreover, pre-diet levels of the vitamin were linked to weight loss in a linear relationship. 

Additionally, higher baseline vitamin D levels of both 25 (OH) D and 1,25 (OH) 2D were linked to increased loss of abdominal fat. 

Sibbley added a note of caution, saying that more research is needed.  "Our findings need to be followed up by the right kind of controlled clinical trial to determine if there is a role for vitamin D supplementation in helping people lose weight when they attempt to cut back on what they eat." 

The study was funded by the National Institutes of Health, the University of Minnesota, and the Pennock Family Endowment at the University of Minnesota. 


Vitamin D Deficiency 

Click here to learn more about Vitamin D Deficiency 



Studies have shown that maintaining an optimum vitamin D level of 40-60 ng/ML (nanograms per milliliter) can prevent many diseases.  Some examples are listed below.


Studies of Individuals        Serum 25 (OH) D Level        % Reduction

Cancers, All Combined                      40-53                         35-75

Breast Cancer                                   53-66                         50-67

Colon Cancer                                    41-48                         20-25

Fractures, All Combined                     39-41                            50

Click here to see the complete list

All Cancers:  Lappe JM, et al.Am J Clin Nutr. 2007.85:1586.91.  Breast Cancer:  Garland CF, et al. J. Steroid Biochem Mol Biol. 2007.103:708.11.  Colon Cancer:  Gorham ED et.al. Am J Prev Med. 2007.32:210-6.  Fractures:  Bischoff-Ferrari HA et al. JAMA 2005.293:2257-


Sunscreens Can Block vitamin D
"A little sunlight is necessary for healthy bones"
By Robert Bazell, Correspondent
NBC News

Tamara Smith visits a tanning parlor when she can’t be outside in the sun. “I’m always indoors. I don’t go outside," says Smith.

Many doctors say ultraviolet light from the sun or a tanning machine is dangerous because of the risks associated with skin cancer. But some health experts, such as Dr. Michael Holick of Boston University, disagree.

“I believe that Americans have gone overboard with their fear of the sun. I think that sensible exposure to sunlight is really important for your overall health and well-being,” says Holick.

The reason for the concern is vitamin D, essential for bone strength and other health needs, which our skin makes through exposure to the sun's ultraviolet rays.

We need 1,000 units of vitamin D a day, but a glass of milk supplies only 100 units and a multivitamin only 400. So most people need the sun in order to avoid deficiency.

Sunscreens can reduce vitamin D production
Now, new research has found that wearing sunscreen continuously can reduce the amount of vitamin D a person is able to make.

"We looked at individuals that always wore a sunscreen before they went outside. ... And we found that, indeed at the end of the summer, they were deficient in vitamin D," says Holick. "And so we have shown over and over again that adults, even if they're on a multivitamin, and drinking milk, if they always wear sun protection, or avoid any direct sun exposure, they're at high risk of developing vitamin D deficiency."

Rooftop measurements of sunlight show that, for most people, getting enough sunlight exposure at this time of year is not easy, even for people who don't regularly wear sunscreen. In the middle of the winter on a very sunny day in a city as far north as Boston, there’s not enough sunlight for people to get sufficient quantities of vitamin D.

The good news is that if you get enough sun during the rest of the year, it carries you through the winter, says Holick.

Or there are machines. In Holick’s lab he put young people in tanning machines and measured their bone density.

“Tanners had higher bone density on average than non-tanners,” says Holick.

Still, he cautions against the dangers of skin cancer and warns people not to go overboard. However, it is critical, he says, to realize the sun’s rays are not always our enemy.

How Sun Exposure Benefits Human Health
  • Improves bone health
  • Enhances mental health (SAD, PMS, depression, general mood)
  • Prevents certain cancers
  • Improves heart health
  • Alleviates skin disorders
  • Decreases risk of autoimmune disorders, including multiple sclerosis, Type 1 diabetes mellitus, and rheumatoid arthritis
  • Alleviates conditions related to obesity that prevent participation in an exercise program

Dr. Michael Holick, PH.D., M.D.
Author, The UV Advantage (this is a great book - available at Amazon.com)


if your Serum 25(OH)D, ng/ml
is at 39, then your prevention and or cure % = 35%
is at 52.5%, then your prevention and or cure rate for all cancers =75% 

About Vitamin D Deficiency

Vitamin D is essential for the development and maintenance of healthy bones.  Early in life, Vitamin D is necessary for bone development and growth.  Later in life, Vitamin D is necessary for bone maintenance.

Vitamin D is normally made in our skin or ingested in the foods we eat. In our skin Vitamin D is made by the photoconversion of 7-Dehydrocholesterol (a provitamin) to Previtamin D3 Previtamin D3undergoes thermal isomerization to Vitamin D3 which is picked up by serum proteins and carried first to the liver where it undergoes a hydroxylation to 25-hydroxy Vitamin D and then 25-Hydroxy Vitamin D is carried to the kidneys where a second hydroxylation occurs which makes the active form of the vitamin 1,25 calciferol.

When we ingest foods containing Vitamin D3,  like certain fish oils, or milks or cereals fortified with Vitamin  D3, the D3is transported through the gut and carried by proteins for the necessary hydroxylations by the liver and kidneys(ref.)  There are several disturbing reports that some foods purported to contain Vitamin D; in fact, do not.

Vitamin D is stored in the body fat ant the major circulating form of vitamin D, 25 (OH)D has a circulating half life of approximately 2-3 weeks.  Both of these in combination can help maintain a person’s vitamin D status in the normal range throughout the winter if they obtain enough vitamin D during the spring, summer and fall from sun exposure.  However, it should be appreciated that body fat can sequester vitamin D, and that we and others have shown that obese people are more prone to vitamin D deficiency because of the irreversible sequestration of vitamin D in the body fat.  It also should be recognized that you would need to raise your blood levels of 25 (OH)D into the 100-150 nmol/L (40-60 ng/ml) range by the end of the summer in order to store enough vitamin D in your body fat and have enough 25 (OH)D in the circulation to sustain you throughout the winter.  Since most children and adults never reach this blood level, it is necessary for them to increase their dietary intake of vitamin D and to take a vitamin D supplement throughout the winter to maintain their 25 (OH)D levels above 75/nmol/L which most experts agree is a healthy preferred level.

It is well documented that increase in sensible sun exposure and or vitamin D intake improves overall health and well being.  Exposure to ultraviolet B radiation or increasing intake of Vitamin D maximizes bone health in children; helps prevent osteoporosis in adults; decreases risk of common autoimmune diseases including multiple sclerosis, rheumatoid arthritis, Crohn’s disease and type 1 diabetes; reduces risk of serious deadly cancers including cancers of the colon, breast, prostate, ovary, esophagus and others; and decreases risk of cardiovascular heart disease.  In addition, it is well documented that exposure to solar ultraviolet radiation was an effective method of treating patients with tuberculosis.  Recent revelations have documented that it is necessary to increase blood levels of vitamin D either from solar ultraviolet irradiation, artificial ultraviolet irradiation or increasing vitamin D intake for enhancing the immune system to destroy the bacterium that causes tuberculosis.  Thus, sensible exposure to ultraviolet B radiation from sun or lamps is an effective method of maintaining adequate vitamin D levels to sustain health throughout life.

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