Natural Factors Vitamin D3 1000IU 500+500s Twin Pack


Vitamin D3 from Natural Factors provides a convenient daily dose of vitamin D as cholecalciferol to help support immune function and for the development and maintenance of strong bones and teeth. Vitamin D3 is the natural form of this vital nutrient and is most effective at raising blood levels of active vitamin D.

  • Supports healthy immune system function.
  • Aids in the normal development and maintenance of bones and teeth.
  • Helps reduce the risk of developing osteoporosis when combined with adequate calcium, a healthy diet, and regular exercise.



Vitamin D is the sunshine vitamin, which the body creates when skin is exposed to ultraviolet light. It is essential for immune function, calcium absorption, building and maintaining strong bones and teeth, and overall health. Many individuals lack sufficient vitamin D, and vitamin D supplementation is widely recommended throughout life.

Vitamin D plays a key role in the absorption of calcium and phosphorus, two minerals that are vital for proper bone mineralization and turnover. Vitamin D is also required for the body’s innate and adaptive immune responses.

Each tablet or softgel delivers a single 1000 IU (25 mcg) dose of vitamin D3 for convenient maintenance of adequate vitamin D levels, even when dietary intake and sun exposure are lacking. When combined with an adequate calcium intake, a healthy diet, and regular exercise, vitamin D3 helps reduce the risk of developing the brittle, weak bones of osteoporosis.

Vitamin D3 1000 IU is certified non-GMO and is available as tablets or softgels in 90, 180, 360, and 500 count bottles. This formula contains no artificial colours, preservatives, sweeteners, or common allergens, and is suitable for use during pregnancy and while nursing an infant.




Each softgel contains:

Vitamin D3 (cholecalciferol) ............. 1000 IU (25 mcg)


Softgel (gelatin, glycerin, purified water), organic flaxseed oil.


Directions & Cautions

Recommended Use

  • Helps maintain/support immune function for maintaining general health.
  • Helps in the absorption and use of calcium and phosphorus, in the normal development and maintenance of bones and teeth, and in preventing vitamin D deficiency.
  • Calcium intake, when combined with sufficient vitamin D, a healthy diet, and regular exercise, may reduce the risk of developing osteoporosis.



Recommended adult dose: 1 softgel daily or as directed by a health care practitioner.


Cautions & Warnings

Keep out of the reach of children.

Keep out of reach of pets. Vitamin D can be very toxic for certain animals, please check with a veterinarian.