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Truly American Made
Thorne Vitamin D3 Supplement 1000 IU by Thorne Research - American Made
100%

Thorne Vitamin D3 Supplement 1000 IU

by Thorne Research— Made in Summerville, SC

Verified American Made

American Score

71% — Brand-verified

Why not 100%? Full verification requires additional independent sources

Manufactured in Summerville, SC
Manufacturing in USA since 1984

Verified through 2 independent sources

  • Known factory location
  • Brand website

Evidence Breakdown

Factory: City-level verified
Website claim: Yes
History: Established
Overseas lines: None known
How we verify every product|Full brand evidence
See all products made in South Carolina

Vitamin D3 supplement supporting healthy bones, teeth, muscles, and immune function. Gluten, dairy, and soy-free. Third-party certified. Made at Thorne's Summerville, South Carolina manufacturing campus.

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