Where to buy MK-677 (Ibutamoren)

3 vendors are tracked here with public certificates of analysis: Sports Technology Labs, Limitless Biotech, Swiss Chems. The Per-lot COA badge marks vendors who publish a per-batch certificate; Vendor spec means a marketed purity claim only. Click the source link on each row to verify the document before you buy.

Research-grade synthetic peptides typically test 98–99.5% by HPLC. Across the records on this page, MK-677 (Ibutamoren) ranges 99.00% to 99.92%. Anything below 95% is below the standard threshold for analytical-grade material; anything below 90% indicates significant impurities and warrants caution.

In the records covered, Sports Technology Labs reports 99.92% (test date Nov 17, 2025) for Ibutamoren / MK-677. Verify against the linked source before purchasing.

Both partner vendors offer the code ENHANCED. Ascension Peptides (injectable research vials): 50% off the catalog. Limitless Biotech (oral capsules and nasal sprays): 15% off. Codes apply at checkout.

Every record on this page links to the vendor's public certificate. Per-lot COAs (highest trust) come from independent third-party labs and report the analytical method, lot number, test date, and integrated peak purity. Vendor-spec rows reflect a marketed purity claim and link to the vendor's product page so you can request the per-batch document directly.