Vital for calcium absorption and the maintenance of healthy bones and teeth. Supports cellular health and proper nervous system and immune function. How Does NSI® Vitamin D3 work? Vitamin D3, also known as cholecalciferol, is a form of vitamin D that the body manufactures when skin is exposed to UV radiation from the sun. It's converted from food sources and sunlight into its active form, calcitriol, by the liver and kidneys. Vitamin D is necessary for the maintenance of healthy calcium and phosphorous levels in the body. Calcium, the main structural element in bones and teeth, can only be absorbed by the body when vitamin D is present. Vitamin D is therefore essential for building and maintaining healthy bones and teeth. It's also believed to contribute to increased muscle strength, which may help improve balance and reduce the risk of falls among the elderly. Vitamin D also plays a part in regulating cellular growth and keeping the nervous and immune system functioning properly. A review article in the September 2006 issue of Progress Biophysics Molecular Biology indicated that vitamin D can also help maintain healthy blood pressure, blood sugar and overall cellular health¹. It's estimated that a significant percentage of adults suffer from vitamin D deficiency. Vitamin D deficiency is associated with a variety of health complications, including rickets (in which bones are unable to properly calcify, or harden) in children, poor prostate health in men and poor bone health in older adults. The elderly, alcoholics and strict vegetarians (vegans) are particularly at risk for deficiency and should consider regular supplementation. Individuals with darker skin pigments may also be at increased risk, as darker skin contains higher levels of melanin, which may inhibit the skin's ability to produce vitamin D from sunlight. Also, people with intestinal malabsorption, hyperthyroidism, liver or kidney disease, or pancreatic conditions may be at risk. Vitamin D deficiencies are common among those with overactive parathyroid glands. This gland is responsible for maintaining calcium levels, which is vital for proper functioning of the muscular and nervous systems. One study found that insufficient levels of immune cells were produced in the thymus glands of laboratory animals with vitamin D deficiencies. However, a normal eight-week vitamin D intake led to healthy levels. Recent studies suggest that the current RDA/DV of vitamin D (200 IU for individuals under age 50,400 IU for those between the ages of 50 and 70, and 600 IU for those over the age of 70) may not be adequate. In fact, optimal levels are between 2,000 and 4,000 IU per day. NSI® Vitamin D3 is better because it:. Provides 1,000 IU of vitamin D3 per serving. Is the active and preferable form of vitamin D.
Average Customer Rating:
4.8 out of 5
47 of 48 (98%) customers would recommend this product to a friend.
Customer Reviews for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Excellent Product,
May 16, 2008
By Mikiefrom Roanoke, VA
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"Vitamin D deficiency has been big in the news recently. Because I have the start of osteoporosis, my GYN checked my Vitamin D level and it was very low. I went on 2,000 IU of this product for 4 months and my level is back to normal. Be sure to have your Vitamin D level checked before you take this product. If you are not deficient, you should not take extra D, as it has not been determined how safe an excess of D is. Also, make sure you take Vitamin D3 for deficiency."
Age:
45-54
Gender:
Female
Daily supplement usage:
6+ supplements daily
Referral source:
Self-referred
Reason for usage:
Specific health concern
Duration of use:
61-180 days
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Review 2 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Seems to be working,
May 16, 2008
By sapph
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
4
out of 5
Satisfaction:
5
out of 5
"I've been reading a lot about increasing your intake of Vitamin D so I thought I'd give it a try. I started with just one a day but have started taking 2, which I think is making a difference. I definitely notice that I'm happier and I also started exercising regularly, which I haven't done in a long time. I can't say that the D did it but the mood improvement may have foster the desire to exercise. Either way, I feel better."
Age:
35-44
Gender:
Female
Duration of use:
Over 180 days
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Review 3 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
This is great,
May 16, 2008
By kristymaycfrom New Hampshire
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"Vitamin D is needed in higher amounts than we onced realized. I feel better, as I know I'm definitely getting the RDA and more."
Age:
25-34
Gender:
Female
Daily supplement usage:
6+ supplements daily
Referral source:
Physician
Reason for usage:
Promote overall health
Duration of use:
61-180 days
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Review 4 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
great value,
May 11, 2008
By millielufrom Oklahoma
Value:
5
out of 5
Quality:
4
out of 5
Effectiveness:
4
out of 5
Satisfaction:
5
out of 5
"Great to have this until the weather warms up and I am in the sun a little. Great value, great product and small and easy to take."
Age:
45-54
Daily supplement usage:
6+ supplements daily
Referral source:
Self-referred
Reason for usage:
Specific health concern
Duration of use:
Less than 30 days
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Review 5 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
So easy to take,
March 11, 2008
By Janney
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"I've been hearing a lot about the benefits of Vit D in the news, so I decided to start taking. It's really not that expensive and capsule is easy to swallow."
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Review 6 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
very good multi-vitamin,
March 11, 2008
By Co57cyclistsfrom Westminster, Co
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"I have found this to be a very good mulit vatamin. I am a road cyclists and using this has improved my preformance. On century rides I found out I can improve my preformance by using these as a supplement at the 50 mile mark. In doing some comparisions with other sport supplements their contents are very similar or even the same."
Age:
55-64
Gender:
Male
Daily supplement usage:
3-5 supplements daily
Referral source:
Other
Reason for usage:
Enhanced performance
Duration of use:
Over 180 days
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Review 7 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Top 25 Contributor
Overall Rating:
4
out of 5
D3 is supposed to be essential,
February 4, 2008
By tazman
Value:
4
out of 5
Quality:
4
out of 5
Effectiveness:
4
out of 5
Satisfaction:
4
out of 5
"Supposed to be good, haven't "felt" anything.... but then again, i feel nothing from eating broccoli, so doesn't mean it not working/helping... but it is well researched to be great to take..."
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Review 8 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Great Bargain!,
February 2, 2008
By VitaNewYorkerfrom Brooklyn, NY
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"I love this product. I take it everyday and it's a real convenience having this dose in such a small capsule too. The amount you get also is a great deal in my book. I definitely recommend this product to my friends and family members. No problems whatsoever."
Age:
25-34
Gender:
Male
Daily supplement usage:
3-5 supplements daily
Referral source:
Self-referred
Reason for usage:
Promote overall health
Duration of use:
61-180 days
Share this Review:
Review 9 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Best Vitamin D Value Out There,
December 19, 2007
By Thanfrom St. Louis, MO
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"My doctor recommended a few months back that I start taking large doses of Vitamin D daily (about 5,000 IU), so I needed a relatively low cost, high quality supplement. This product (also available in 2,000 IU doses) met the need quite nicely, and according to my latest blood test has done the job."
Age:
25-34
Gender:
Male
Daily supplement usage:
1-2 supplements daily
Referral source:
Self-referred
Reason for usage:
Specific health concern
Duration of use:
61-180 days
1 of 1 people found this review helpful.
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Review 10 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Top 500 Contributor
Overall Rating:
5
out of 5
Easy to swallow,
December 8, 2007
By Katifrom Moses Lake, WA
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"I bought this great product for my mother-in-law and she does take it daily because it is easy to swallow. My husband takes it as well for the same reason."
Age:
45-54
Gender:
Female
Daily supplement usage:
6+ supplements daily
Referral source:
Self-referred
Reason for usage:
Promote overall health
Duration of use:
30-60 days
Share this Review:
Review 11 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
excellent product,
December 8, 2007
By emmelinefrom Cocoa Beach, FL
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"Research on my part convinces your products are of excellent quality and the price is very reasonable."
Age:
65-74
Gender:
Female
Daily supplement usage:
6+ supplements daily
Referral source:
Self-referred
Reason for usage:
Specific health concern
Duration of use:
30-60 days
Share this Review:
Review 12 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Very convenient vitamin to take,
October 3, 2007
By Sample
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"The shape makes it very easy to swallow. Assuming the vitamin is as important (to your health) as the claims are - then I'd say it's a great deal."
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Review 13 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
1
out of 5
Not for vegetarians,
September 10, 2007
By RyanW
Value:
1
out of 5
Quality:
1
out of 5
Effectiveness:
1
out of 5
Satisfaction:
1
out of 5
"The product note discusses how vegetarians/vegans need supplementation, but the product itself contains gelatin which isn't vegetarian/vegan."
0 of 1 people found this review helpful.
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Review 14 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Great product,
August 20, 2007
By Marmie
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"As usual this is another of your great products I've been using in conjunction with Alpha Lipoic Acid, Fisol and NSI Synergy Once a Day Vitamin - all recommended to be by me rheumatologist - even this website! He named the products too. How could I go wrong. The prices are great and the products are great."
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Review 15 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Easy to swallow!,
August 18, 2007
By Snoops
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"These capsules are very easy for my son to take. They are just the right size."
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Review 16 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Very effective in raising Vit D level,
August 16, 2007
By AU8285
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"My wife, who gets very little sun exposure, was told to use a supplement to raise her serum Vit D level. She tried 2 capsules a day and we have seen her level steadily rise over the last 5 months to a normal level. Also, these are small capsules that are easy to swallow and the price is very reasonable."
1 of 1 people found this review helpful.
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Review 17 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
vitamin d3 effectiveness,
August 11, 2007
By mikemcdeezfrom tampa
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"i used to occasionally have an unusual amount of muscle spasms that would occur in my legs. i did some research and found alot of info regarding vitamin d3 and its effects on neuromuscular ailments. well, pretty much immediately after starting to take this product the spasms stopped completely. i recommended it to a friend who was complaining of the same thing and he recently told me it worked for him also. i couldn't be more satisfied with this product, thank-you."
Age:
35-44
Gender:
Male
Daily supplement usage:
3-5 supplements daily
Referral source:
Self-referred
Reason for usage:
Specific health concern
Duration of use:
Over 180 days
Share this Review:
Review 18 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Easy to take,
August 9, 2007
By BobW
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
4
out of 5
Satisfaction:
5
out of 5
"The capsules are short and skinny and very easy to swallow. Price and dose is good for me. Can't give 5 stars on effectiveness because I can only make assumptions as to the potency, but the IU quantity is good for the size."
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Review 19 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
June 18, 2007
By math
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"A lot of hypo on vit D3, a lot of confirming research. Excellent product."
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Review 20 for NSI Vitamin D3 (as cholecalciferol) -- 1000 IU - 200 Capsules
Overall Rating:
5
out of 5
Excellent Value and product,
May 20, 2007
By JohnnieG
Value:
5
out of 5
Quality:
5
out of 5
Effectiveness:
5
out of 5
Satisfaction:
5
out of 5
"This product is priced extremely well and is a voluble supplement that I don’t want to live without. Thanks to Vitacost for providing a great and convenient source for me."
