Thorne Research D-1000

  • Description & Features

The requirement for vitamin D supplementation needs to be individualized. Thorne Research’s D-1000 is ideal for maintaining optimum vitamin D levels in many healthy individuals.

It is essential to maintain healthy vitamin D levels throughout all stages of life, from fetal development to old age.  Vitamin D helps protect a number of important functions in the body.  The current recommended daily vitamin D intake of 400 IUs is based on the minimum allowance to protect against bone disease. However, an upward revision of the FDA's guideline is now under consideration in light of new research, especially pertaining to immune function. Cutting-edge research suggests serum vitamin D levels should be in the range of 32-80 ng/mL 25-hydroxyvitamin D (25(OH)D). Although direct sunlight exposure is a good source of vitamin D, many people do not get enough sun due to season change, latitude, or lifestyle. Therefore, vitamin D supplementation can be of great benefit in these cases.

Thorne Research's D-1,000 supplies 1,000 IU of vitamin D3 in each vegetarian capsule. This potency is ideal for maintaining optimum vitamin D levels in healthy individuals.

  • Containing 1,000 IU of vitamin D3 per capsule
  • Thorne Research's vitamin D contains no unnecessary ingredients – like lactose, BHT, BHA, sodium benzoate, and sorbic acid – that can be detrimental to sensitive individuals
  • supports cardiovascular, immune, and bone health

Medicinal Ingredients:
Per Capsule:
Vitamin D3 (Cholecalciferol) 25 mcg

Non-Medicinal Ingredients:
Hypromellose (derived from cellulose) capsule, L-Leucine, Silicon Dioxide, Cellulose, Vitamin E.

Recommended Dose (Adults):

Take 1 capsule daily or as recommended by a health-care practitioner. Children/Adolescents (4-18 years): Take 1 capsule daily or as recommended by a health-care practitioner.


Keep out of reach of children. Do not use if security seal inside the cap is broken. Store tightly sealed in a cool, dry place.  This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.  If pregnant, consult your health-care practitioner before using this product.  There are no known adverse interactions or contraindications at publication date.

We are only able to ship this item to Canadian customers.
No Information Provided

Other Thorne Research Products

Rated 5 out of 5 by from I trust the high quality of all Thorne Research products and their Vitamin D is especially helpful in winter when we have less sunshine in our northern climates. The small size of the capsule also makes it easy to swallow for those of us who face some challenges with the larger caps.
Date published: 2017-12-12
Rated 5 out of 5 by from Thorne is always excellent quality. D-1000 is a perfect addition to a vitamin regimen. Drops are more easily absorbed but capsules are easier to manage and travel with.
Date published: 2017-12-12
Rated 5 out of 5 by from Easy to swallow and lots of vitamin D especially when we have less sunshine!
Date published: 2020-10-09
Rated 5 out of 5 by from Must take vitamin I love Thorne (trusted) and these tiny D vitamins are my favourite ones.
Date published: 2020-11-24
Rated 5 out of 5 by from I like these small capsules they are easy to swallow.
Date published: 2019-10-04
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