Kirkland Signature
Costco quality at low prices — big-size daily basics.
Costco's private label — excellent value on large-size, low-price everyday supplements.
Brand facts
- Founded
- 1995
- Headquarters
- Washington, USA (Costco)
- Parent / operator
- Costco Wholesale
- Origin
- United States
About Kirkland Signature
Costco's private label. It contracts major manufacturers to deliver large-size, low-price daily basics (fish oil, multivitamins, vitamin D), earning a loyal following for value. Some products carry USP verification.
What sets Kirkland Signature apart
Backed by warehouse-club buying power, it uniquely combines bulk size, low unit cost and baseline quality assurance.
Ingredient sourcing
Contracts established manufacturers to keep ingredient quality consistent.
Manufacturing & quality
Made by cGMP contract manufacturers, with USP verification on some items.
Certifications & testing
- USP Verified (select products)
- cGMP-compliant
Signature products
- Fish Oil
- Daily Multi
- Vitamin D3
- Vitamin C
Focus categories
- Omega-3
- Multivitamins
- Vitamins
- Daily basics
Price positioning
Budget — big sizes at among the lowest cost per serving.
Where to buy in Japan
Available at Costco stores, Costco Online, and some Amazon.co.jp / Rakuten listings.
Best for
People who want daily basics in bulk at low prices, including for the family.
Things to keep in mind
Plan to finish the large sizes; mainly aimed at Costco members.
Prices are sample data. Check the retailer's site for the current price.