Purchased thorne vitamin c locally. was going to refill on amazon. can the manufacturer thorne simply state whether ingredients are from china or not?

Dan, one of the reasons I buy Thorne is because the brand is highly recommended by Dr. Andrew Huberman from Standford Med. The ingredients are not from China. Headquaters are in NYC and manufacturing is in South Carolina. Hope that helps.

Is this NSF certified?

There is nothing on the label that says NSF Certified.

Ascorbic acid? so sourced from China?

The container does not specify where it is manufactured.

What are the capsules made of?

Hypromellose – also known as hydroxypropyl methylcellulose – is used to make Thorne's vegetarian capsules. Most of the HPMC Thorne uses to make their vegetarian capsules is naturally derived from wood pulp. In addition, Thorne’s vegetarian capsules are organic compliant, non-GMO, Kosher and Halal certified, vegan, and hypoallergenic.

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🛡️ Elevate your wellness game with the pro-grade Vitamin C blend everyone’s talking about!

IMMUNE ARMOR - Fortify your defenses with a potent 1000mg Vitamin C blend enhanced by natural citrus bioflavonoids.
CLEAN CONFIDENCE - Gluten-free and free from common allergens, perfect for the mindful, health-conscious professional.
ELITE ENDORSEMENT - Backed by 100+ pro teams and Mayo Clinic collaboration—join the ranks of champions fueling peak performance.
RECOVERY CATALYST - Accelerate wound healing and tissue repair with antioxidant-rich formula trusted by pro athletes.
RADIANT RESILIENCE - Support collagen production to keep skin, nails, and hair looking vibrant and youthful.

THORNE Vitamin C delivers a powerful 1000mg dose of Vitamin C combined with citrus bioflavonoids to support immune health, collagen production, and cellular energy. This gluten-free, allergen-conscious formula is trusted by professional athletes and developed in partnership with Mayo Clinic, making it a premium choice for adults seeking advanced wellness support.

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