Kirkland Signature Vitamin C 1000 mg

Kirkland Signature is the exclusive private-label brand of Costco Wholesale Corporation. Launched in 1995, the brand was named after the city of Kirkland, Washington, where Costco's headquarters were located at the time. The brand was created to provide high-quality products at prices significantly lower than national competitors by leveraging Costco's massive scale.

Kirkland Signature supplements, including Vitamin C, are typically manufactured in the United States by third-party contract manufacturers that meet stringent quality standards; many of their vitamins are USP (United States Pharmacopeia) verified for purity and potency. Today, Costco remains the ultimate owner and distributor, maintaining the brand as a cornerstone of its membership-based retail model worldwide.