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Retailer

Costco

Membership warehouse club selling bulk supplements, including Kirkland Signature, online and in warehouses.

Costco lists 17 compounds on DiscoverMedica, including Berberine, Collagen peptides and NMN.

Listed here
17 compounds
Statuses
Prescription · No prescription
Checked
October 7, 2026
Visit Costco
A close-up mix of unbranded softgels, capsules and tablets on a dark marble stand beside a bowl of white capsules.

What does Costco offer?

  1. BerberineBerberine (multiple brands)
    No prescription
    see site
  2. Collagen peptidesCollagen peptides (multiple brands)
    No prescription
    see site
  3. NMNNMN (multiple brands)
    No prescription
    see site
  4. MelatoninMelatonin (multiple brands)
    No prescription
    see site
  5. Magnesium glycinateMagnesium glycinate (multiple brands)
    No prescription
    see site
  6. L-theanineL-theanine (multiple brands)
    No prescription
    see site
  7. Omega-3 fatty acidsOmega-3 fish oil (multiple brands)
    No prescription
    see site
  8. Creatine monohydrateCreatine monohydrate (multiple brands)
    No prescription
    see site
  9. Vitamin DVitamin D3 (multiple brands)
    No prescription
    see site
  10. ProbioticsProbiotics (multiple brands)
    No prescription
    see site
  11. PsylliumPsyllium fiber (multiple brands)
    No prescription
    see site
  12. RetinolRetinol skincare (multiple brands)
    No prescription
    see site
  13. AshwagandhaAshwagandha (multiple brands)
    No prescription
    see site
  14. Magnesium citrateMagnesium citrate (multiple brands)
    No prescription
    see site
  15. Vitamin B12Vitamin B12 (multiple brands)
    No prescription
    see site
  16. IronIron supplements (multiple brands)
    No prescription
    see site
  17. MinoxidilMinoxidil topical (OTC) (multiple brands)
    Prescription
    see site

† Prices as listed by the provider when we checked; they change. Checked October 7, 2026.

At a glance

  • Paid membership required to shop (Personal or Business)
  • Executive membership earns an annual 2% reward
  • Executive members get a monthly credit on same-day delivery
  • Kirkland Signature store-brand supplements

Checked October 7, 2026. Sources: Join Costco, Costco homepage