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Vitamin D3 125 mcg (5000 IU) SupplementBest Seller

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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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What It Is

Cooper Complete® Vitamin D3 125 mcg (5000 IU) supplement is for those who need more vitamin D than what they’ve absorbed through sunlight and diet.

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 125 mcg (5000 IU) Vitamin D3. Each bottle contains 120 servings.

How It Helps

Cooper Complete Vitamin D supplement provides 125 mcg (5000 IU) vitamin D3 in the cholecalciferol form in each softgel. Vitamin D3 is more easily absorbed than vitamin D in the D2 form.

 Vitamin D3 125 mcg (5000 IU) is recommended for individuals who suffer from a vitamin D deficiency, as shown in a blood test sample, and who have been advised by their physician to take additional vitamin D-3†. Vitamin D deficiency is more common in people who:

  • Spend little time outside
  • Have a darker skin tone
  • Live in northern rather than southern latitudes
  • Have limited exposure to sunlight due to indoor work, indoor athletics, or clothing choices when outdoors
  • Diligently wear sunscreen
  • Are 50 years or older (as deficiency risk increases with age)
  • Have bowel disease or another chronic health condition
  • Are obese

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

Each bottle contains 120 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 or want to learn more about our testing process and results, contact us at customerservice@coopercomplete.com or call 888.393.2221 from 9 a.m. until 5 p.m. Monday-Friday central time (CST).


Vitamin D 125 mcg (5000 IU)
Supplement Facts

Serving Size: 1 softgel
Servings per Container: 120
Ingredients Daily
% Daily
Vitamin D-3 (as cholecalciferol) 125 mcg (5,000 IU) 625%

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

Other ingredients: Olive 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: 816899000133
Item#: 257
Formula#: 80005529 V0121

Customer Reviews

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Reviews of Vitamin D3 125 mcg (5000 IU) Supplement

  1. Due to multiple medical issues, my doctor recommended I take vitamin D. Once researched I could not be happier with Cooper Complete. the service is excellent, the communication is great and the product is the real deal with the finest ingredients. Very happy customer
    thank you!!!!

    verified purchase

  2. Having been a customer of Cooper Complete; when information was put forward regarding the effect of Vitamin D on the COVID-19 virus, I decided to order. Great product, easy to take, and unlike other products, Cooper Complete can be trusted.

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Customer Questions & Answers

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.

Reply from Cooper Complete

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.

Reply from Cooper Complete

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.

Reply from Cooper Complete

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.

Reply from Cooper Complete

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.

Reply from Cooper Complete

What causes Vitamin D deficiency?

Vitamin D levels in humans vary dramatically by season, latitude and race. The 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.

Reply from Cooper Complete

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. “Insufficiency” is generally defined as a level less than 30 ng/ml. Vitamin D “deficiency” is a level less than 20 ng/ml. “Toxicity” does not begin until your vitamin D level hits at least 150 ng/ml. Of interest, most lifeguards and people that live near the equator (where UVB light is most prevalent) have vitamin D levels around 100 ng/ml.

Reply from Cooper Complete

Why is my Vitamin D level low?

There are two primary reasons why most of us lack vitamin D, according to the authors of the Archives of Internal Medicine article. 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.

Reply from Cooper Complete

Should I take Vitamin D3 125 mcg (5000 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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