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Vitamin D3 25 mcg (1000 IU) Liquid Drops

Vitamin D3 Liquid Drops are designed for individuals who don’t get enough vitamin D from sunlight or diet and prefer a non-pill, liquid vitamin. Each small, one-ounce bottle provides almost 600 drops of 1000 IU (25 mcg) of vitamin D3.



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Vitamin D3 25 mcg (1000 IU) Liquid Drops
Supplement Facts

Serving Size: 1 drop
Servings Per Container: About 590
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: Medium Chain Triglycerides.

Cooper Complete Gluten Free icon




This product is formulated to be free of allergens derived from gluten, corn, yeast, artificial colors and flavors.

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

SKU: 816899000447
Item#: 167
Formula#: L-COO977-871001-A (871.004E)

What It Is

Cooper Complete® Vitamin D3 25 mcg (1000 IU) Liquid Drops are 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) drop with a meal or as directed by your health care professional. Each liquid drop contains 25 mcg (1000 IU) of Vitamin D3. Each bottle contains approximately 590 servings.



How It Helps

Cooper Complete Vitamin D3 25 mcg (1000 IU) Liquid Drops provide 25 mcg (1000 IU) of vitamin D3 in the cholecalciferol form in each drop. The drops are tasteless and in the D3 form of Vitamin D, which is more readily absorbed in the body than the vitamin D2 form.

Vitamin D3 25 mcg (1000 IU) Liquid Drops are 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

Vitamin D is a fat-soluble prohormone that supports bone health and aids in calcium absorption. A growing body of research highlights Vitamin D’s role in several body systems:

  • Immune system support
  • Anti-inflammatory effects
  • Mood booster and depression fighter
  • Supports healthy bone density and strong teeth
  • Increases calcium absorption and balance
  • Supports metabolic health and blood sugar balance already within normal levels
  • Musculoskeletal strength and comfort
  • Weight management

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).

Each bottle contains approximately 590 liquid drops. The daily recommended serving is one drop or, as your physician or health care provider recommends, taken with a meal.

Cooper Complete products are verified and lot tested. If you would like a copy of a Certificate of Authenticity, contact us at or 888.393.2221 from 9 a.m. until 5 p.m. Monday-Friday central time (CST).

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Customer Q&As

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

4 Questions
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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.

I understand vitamin D is fat-soluble. I need about 14,000 IU of vitamin D per week. Can I take the vitamin D I need all at once, or do I need to take 2 drops per day?


Because Vitamin D is fat-soluble, you can take this product in the most convenient way for you. Either take 2 drops per day or 14 drops once per week. (Remember, for best absorption, make sure you take vitamin D after you have eaten and consumed some fat.


Does this product need to be taken with food?


Yes. Vitamin D needs the fat from food to be absorbed, so take vitamin D supplements with or immediately following a meal.


What does “liquid drops” mean?


Each one-ounce glass bottle of Liquid Vitamin D3 contains almost 590 single drops of vitamin D3. The dropper can be carefully squeezed to dispense 1000 IU (25 mcg) of vitamin D per drop. The drop, which is tasteless, can be dispensed directly into your mouth, or if you prefer, placed atop applesauce, yogurt or another food that you consume with a spoon.

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