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Vitamin D3 25 mcg (1000 IU) Supplement

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Many individuals don’t get enough vitamin D from sunlight or through diet. Vitamin D3 form of Vitamin D Supplement for better absorption.



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Vitamin D3 25 mcg (1000 IU)
Supplement Facts

Serving Size: 1 softgel
Servings Per Container: 60
Ingredients Daily
% Daily
Vitamin D-3 (as cholecalciferol) 25 mcg (1,000 IU) 125%

*Percent Daily Value for Adults and Children 4 or more years of age.

Other ingredients: Soybean oil, gelatin, glycerin and purified water.

Cooper Complete Gluten Free iconCooper Complete Non GMO Icon

Gluten-free, Non-GMO.

While we strive to ensure the label information on this site represents the label on the product available for purchase, products are updated from time to time. Please consult the label on the product you purchase for the most accurate ingredient and allergen information.

SKU: 816899000195
Item#: 157
Formula#: COO-3001-60CT V1222

What It Is

Cooper Complete® Vitamin D3 25 mcg (1000 IU) supplement is for those who need more vitamin D than what they’ve absorbed through food and sunlight.

How to Use:

As a dietary supplement, take one (1) softgel daily with a meal or as directed by your health care professional. Each softgel contains 25 mcg (1000 IU) Vitamin D3. Each bottle contains 60 servings.



How It Helps

Cooper Complete Vitamin D supplement provides 25 mcg (1000 IU) vitamin D3 in the cholecalciferol form in each softgel. The D3 form of Vitamin D is more readily absorbed in the body than the vitamin D2 form.

Vitamin D3 25 mcg (1000 IU) Supplement is suggested for those with a vitamin D deficiency, as shown through laboratory testing.† Vitamin D deficiency is more common in people who:

  • Are 50 years or older (as the risk for deficiency increases with age)
  • Spend little time outdoors
  • Are a darker skin tone
  • Live in northern latitudes
  • Work indoors
  • Exercise indoors rather than outdoors
  • Have limited skin exposure due to clothing choices when outdoors
  • Consistently wear sunscreen
  • Have a chronic health condition
  • Are obese

This supplement is for individuals who need higher levels of vitamin D supplementation than the amount of vitamin D3 in Cooper Complete multivitamins. Original and Basic One multivitamins contain 50 mcg (2000 IU), while the Multivitamin Gummy provides 25 mcg (1000 IU) in four gummies.

Each bottle contains 60 softgels. The daily recommended serving is one softgel with a meal.

Cooper Complete products are verified, and lot tested. If you would like a copy of a Certificate of Authenticity for a specific product or to learn more about our testing process and results, please contact us at or call us at 888.393.2221 9 a.m. until 5 p.m. Monday-Friday central time (CST).

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What Our Customers are Saying

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Reviews of Vitamin D3 25 mcg (1000 IU) Supplement

  1. I’ve been taking a broad spectrum of Cooper Complete vitamins for 15 years since I first became a patient of Dr. Cooper and It was one of the BEST decision ever made. THEY WORK

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Customer Q&As

If you have questions, we have answers. See what real people are asking about Cooper Complete products.

10 Questions
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Should I take this vitamin D supplement with or without food?


This vitamin should be taken with a meal that contains some fat, as vitamin D is a fat-soluble vitamin and requires fat in order to be absorbed.


Can vitamin D interfere with sleep?


High doses of vitamin d, as well as high blood levels of vitamin D, may interfere with the body’s production of melatonin, resulting in a deterioration in sleep quality. Consult with your physician for the dosage that is right for you.


Should I take this product if I am also taking Coumadin or Warfarin?


If you are taking Coumadin or Warfarin, we recommend consulting your doctor before adding any supplements to your diet.


Can Vitamin D help reduce pain caused by osteoarthritis?


A study published in The Clinical Journal of Pain found obese individuals with knee osteoarthritis who had higher levels of vitamin D experienced less knee pain than those with deficient or insufficient levels of vitamin D. In the study of 256 middle-aged and older adults with osteoarthritis, the participants provided a self-report of knee pain and completed functional performance tasks that included balancing, walking and rising from a sitting position to a standing position. The participants with healthy vitamin D levels had less knee osteoarthritis pain, and could also walk, balance and rise from sitting to standing better than obese participants with insufficient vitamin D levels.


How much Vitamin D do I need to take?


How much is needed varies considerably based on age, skin tone, time of year, sun exposure, where one lives, weight, and other factors. Cooper Clinic suggests consulting with your physician on your specific intake based on your vitamin D test results, age, and health issues.


What Vitamin D level do I need to have?


The recommended target level for vitamin D is open to debate. Most experts agree your vitamin D level should be at least 30 ng/ml. However, doctors at the Cooper Clinic in Dallas, Texas, recommend patients target at least 40 ng/ml as a baseline. A level of 50 ng/ml is considered optimal for brain health.


What causes Vitamin D deficiency?


Vitamin D levels in humans vary dramatically by season, latitude and race. Avoidance of UV exposure has led to an epidemic of low vitamin D levels. There are very few food sources (fatty fish, cod liver oil, fortified milk and fortified cereals) of vitamin D. Most people will have higher vitamin D levels during warmer months due to intentional or unintentional sun exposure. People living in the northeastern United States are at higher risk for vitamin D deficiency due to the lack of sunshine for much of the year. Darker-toned individuals are at higher risk for deficiency due to higher melanin levels in the skin that block UV absorption.


How do I know if I need to take supplemental vitamin D?


The only way to know your vitamin D level is to have a blood test known as 25 hydroxyvitamin D. Because vitamin D comes from food, sunshine, and dietary supplements, the amount needed can vary from person to person. In blood tests, vitamin D (25-hydroxyvitamin D) is measured in either nanomoles per liter (nmol/L) or nanograms per milliliter (ng/mL). One nmol/L equals 0.4 ng/mL, so 20 ng/mL is the same as 50 nmol/L.

  • Levels below 12 ng/mL (30 nmol/L) are too low and may weaken bones and affect health.
  • Levels above 50 ng/mL (125 nmol/L) are too high and not recommended.

Why is my Vitamin D level low?


There are two primary reasons why most of us lack vitamin D. The most significant factor is the increased use of sunscreen. Sunscreen with a sun protection factor (SPF) of 15 decreases vitamin D synthesis by 99 percent. In addition, decreased outdoor activity and obesity are associated with vitamin D insufficiency.


Should I take Vitamin D3 25 mcg (1000 IU) Supplement with or without food?


A study published in the Journal of the Academy of Nutrition and Dietetics, Feb. 2015, found that vitamin D3 absorption increased by 32 percent when taken with a meal where 30 percent of the calories in the meal came from fat.

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