Kirkland Signature Vitamin D3 25 mcg

Kirkland Signature is the private label brand of Costco Wholesale Corporation, originally launched in 1995. The brand was named after Kirkland, Washington, where Costco's headquarters were located at the time. The Vitamin D3 shown is part of a broad range of vitamins and supplements designed to offer quality comparable to national brands at a lower price point.

While the brand is American, manufacturing of Kirkland Signature products involves a global supply chain. Many of their vitamins are manufactured in the United States and Canada, though ingredients or specific batches may be sourced or produced in multiple locations internationally to meet global demand.

Costco Wholesale Corporation remains the ultimate owner and distributor of the brand. By utilizing high-volume purchasing and minimal advertising, they maintain control over the production and distribution of these products exclusively through their warehouse clubs and online platforms worldwide.