Vitamin D-5,000
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Based in Summerville, South Carolina.
Excellent
Strong across all pillars — highly recommended
Independent analysis No brand partnerships
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Ingredient science
Cross-referenced with PubMed & Examine.com
D3 is the best-absorbed form of vitamin D. Deficiency is common in athletes who train indoors or live at higher latitudes, and correcting it supports bone, muscle and immune health. 5,000 IU is a high daily dose — best used to correct a measured deficiency.
Added in a small amount to keep the vitamin D3 stable; it isn't there for its own health effects.
Quality standards
What these mean →1 of 5 standards Pello tracks · Third-party tested for banned substances
Tested for sport
- NSF Certified for SportVerified with NSF · Oct 5, 2026 ↗
Tested for substances banned in sport, with the formula and label reviewed and the manufacturing facilities inspected.
- Informed Sport
- Cologne List
Food & sourcing
- USDA Organic
- Non-GMO Project Verified
Diet claims
- Vegan: not stated
Brand or retailer label claim, not a certification.
- Gluten-free: yes
Brand or retailer label claim. In the US a gluten-free label means under 20 ppm gluten.
- Dairy-free: yes
From the allergen list, where one is available.
Certifications are as listed on the product's page at The Feed. NSF Certified for Sport is also checked against NSF's own database. Certifications can lapse, so check the certifier's search before you rely on one, especially if you're drug tested.
Transparency & Sources
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