For individuals needing short-term, very high-dose vitamin D supplementation.

Since 1984, Thorne has set the standard for the exceptional formulation and quality manufacturing of nutritional supplements. Thorne delive...

Buy Now From Amazon

Product Review

For individuals needing short-term, very high-dose vitamin D supplementation.

Since 1984, Thorne has set the standard for the exceptional formulation and quality manufacturing of nutritional supplements. Thorne delivers premium, science-based products, a health diagnostics technology platform, and the latest in medical education. With more than 350 products, Thorne is the most dispensed brand by 30-40 year old health-care practitioners. Thorne is dedicated to improving the health of our community as well as increasing the knowledge of nutritional health and wellness. Since 2012, Thorne has partnered with educational institutes and local charities to donate more than $1M in products and profits.

Thorne products do not contain any unnecessary binders, coatings, disintegrants, fillers, or lubricants (including magnesium stearate) that could impair absorption. Thorne adheres to the FDA's current Good Manufacturing Practices (cGMPs) and has the highest number of NSF Certified for Sport products which tests for more than 200 banned substances for elite athletic competitions.

  • Thorne's vitamin D is pure vitamin D - without hidden ingredients like lactose, BHT, BHA, sodium benzoate, and sorbic acid
  • 25,000 IUs per capsule for short-term high-dose supplementation or for once-weekly dosing
  • Made without flowing agents that can inhibit bioavailability
  • Supports cardiovascular, immune, and bone health

Similar Products

Thorne Research - Vitamin D-10,000 - Vitamin D3 Supplement (10,000 IU) for Healthy Bones and Muscles - 60 CapsulesThorne Research - Vitamin A - Vitamin A for Healthy Vision, Cellular Development, and Immune Function Support - 90 CapsulesThorne Research - Stress B-Complex - Vitamin B Complex for Stress Support - 60 CapsulesThorne Research - Magnesium Citrate -To Support Energy Production, Heart and Lung Function, and Metabolism of Sugar and Carbs - 90 CapsulesThorne Research - Vitamin D-5000 - Vitamin D3 Supplement (5,000 IU) for Healthy Bones and Muscles- NSF Certified for Sport - 60 CapsulesThorne Research - Basic B Complex - B Vitamins in Their Active Forms - 60 CapsulesThorne Research - Ascorbic Acid (One Gram) - Vitamin C Supplement for Antioxidant Support and Healthy Immune Function - NSF Certified for Sport - 250 CapsulesThorne Research - Selenomethionine - 200 mcg Selenium Supplement for Antioxidant Support - 60 CapsulesGood State ION-MAG - Ionic Magnesium Capsules - (115 mg each serving) (120 veggie capsules)