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Vitamin D3 Supplements

Vitamin D3 Supplements

Vitamin D3 Supplements

Vitamin D3 (cholecalciferol) is the form of vitamin D your skin produces when exposed to sunlight and the form most commonly used in dietary supplements. This collection includes pure D3 products from established brands including NOW Foods, Thorne, Pure Encapsulations, Bluebonnet Nutrition, Douglas Laboratories, and Designs for Health — available in capsules, softgels, liquid drops, and tablets across a full range of potencies from 400 IU to 10,000 IU.

D3 supplements are widely used by adults who have limited sun exposure, live in northern climates, or have dietary patterns that reduce natural vitamin D intake. Products in this collection are pure D3 formulations. If you are looking for a D3 combined with vitamin K2, see our Vitamin D3 + K2 collection.

Available formats include:

  • Softgels and capsules — the most common format, typically with a fat-based carrier for absorption
  • Liquid drops — useful for flexible dosing and for those who avoid swallowing capsules
  • Tablets — a shelf-stable option from several brands
  • Chewables — available from select brands for children and adults

Common potencies in this collection include 1,000 IU, 2,000 IU, 5,000 IU, and 10,000 IU. The right potency depends on your current vitamin D status and the guidance of your healthcare provider.

All products are from established supplement brands. Browse by brand using the links below, or return to the full Vitamin D Supplements hub.

Shop Vitamin D3 by Brand

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Frequently Asked Questions

What is the difference between vitamin D2 and vitamin D3?

Vitamin D2 (ergocalciferol) is derived from plant sources, while vitamin D3 (cholecalciferol) is derived from animal sources such as lanolin or fish liver oil. Research generally indicates that D3 raises and maintains serum 25(OH)D levels more effectively than D2, which is why D3 is the predominant form used in supplements.

Should I take D3 with food?

Vitamin D is a fat-soluble vitamin, so taking D3 with a meal that contains some fat may improve absorption. Many softgel formulations already include an oil carrier (such as olive oil or sunflower oil) to support this.

What is the difference between pure D3 and D3 + K2?

Pure D3 products contain only cholecalciferol. D3 + K2 combinations also include vitamin K2 (typically as MK-7), which some researchers believe works synergistically with D3. If your healthcare provider has recommended only D3, choose a product from this collection. For combined formulas, see our Vitamin D3 + K2 collection.

How do I know which potency is right for me?

Vitamin D potency selection should be guided by your serum 25-hydroxyvitamin D test results and the recommendation of your healthcare provider. Commonly available potencies in this collection range from 1,000 IU to 10,000 IU.

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Vitamin D3 Supplements

Vitamin D3 (cholecalciferol) is the form of vitamin D your skin produces when exposed to sunlight and the form most commonly used in dietary supplements. This collection includes pure D3 products from established brands including NOW Foods, Thorne, Pure Encapsulations, Bluebonnet Nutrition, Douglas Laboratories, and Designs for Health — available in capsules, softgels, liquid drops, and tablets across a full range of potencies from 400 IU to 10,000 IU.

D3 supplements are widely used by adults who have limited sun exposure, live in northern climates, or have dietary patterns that reduce natural vitamin D intake. Products in this collection are pure D3 formulations. If you are looking for a D3 combined with vitamin K2, see our Vitamin D3 + K2 collection.

Available formats include:

  • Softgels and capsules — the most common format, typically with a fat-based carrier for absorption
  • Liquid drops — useful for flexible dosing and for those who avoid swallowing capsules
  • Tablets — a shelf-stable option from several brands
  • Chewables — available from select brands for children and adults

Common potencies in this collection include 1,000 IU, 2,000 IU, 5,000 IU, and 10,000 IU. The right potency depends on your current vitamin D status and the guidance of your healthcare provider.

All products are from established supplement brands. Browse by brand using the links below, or return to the full Vitamin D Supplements hub.

Shop Vitamin D3 by Brand

Related Collections

Frequently Asked Questions

What is the difference between vitamin D2 and vitamin D3?

Vitamin D2 (ergocalciferol) is derived from plant sources, while vitamin D3 (cholecalciferol) is derived from animal sources such as lanolin or fish liver oil. Research generally indicates that D3 raises and maintains serum 25(OH)D levels more effectively than D2, which is why D3 is the predominant form used in supplements.

Should I take D3 with food?

Vitamin D is a fat-soluble vitamin, so taking D3 with a meal that contains some fat may improve absorption. Many softgel formulations already include an oil carrier (such as olive oil or sunflower oil) to support this.

What is the difference between pure D3 and D3 + K2?

Pure D3 products contain only cholecalciferol. D3 + K2 combinations also include vitamin K2 (typically as MK-7), which some researchers believe works synergistically with D3. If your healthcare provider has recommended only D3, choose a product from this collection. For combined formulas, see our Vitamin D3 + K2 collection.

How do I know which potency is right for me?

Vitamin D potency selection should be guided by your serum 25-hydroxyvitamin D test results and the recommendation of your healthcare provider. Commonly available potencies in this collection range from 1,000 IU to 10,000 IU.