Reviewed by Jack Ryan, co-founder & editorial lead · Updated
COA practices 40%9/10
Reputation 20%6/10
Transparency 20%8.5/10
Operations 20%9.5/10
Weighted result 8.4/10; overall rating 8.5/10.
COA evidenceCOA quality 9/10✓COA verified26 Accumark reports; 26 exact catalog strengths. Identity, purity and content on all 26; three add endotoxin and sterility.
Capstone Peptides has 26 Accumark Labs reports that match their official laboratory records and identify the vendor. All cover identity, purity and content, and three also include endotoxin and rapid sterility results. Its 50% coupon works, and US shipping and payment terms are clear. The limited customer-review history, below-label content in specific reports and final-sale policy are the main watch-outs. Overall rating: 8.5/10.
Evidence summary
Capstone Peptides COAs and evidence
Capstone Peptides scores 8.5/10 for its complete, independently verifiable report set and clear customer terms. Its short public review history and report-specific content shortfalls remain relevant.
01
Verified reports, dates and purity range
Capstone publishes 26 complete Accumark Labs reports across 34 pages, each matched to its specific official laboratory record and naming Capstone Peptides. All 26 contain identity, HPLC purity and measured content. Headline purity ranges from 98.2% to 99.92%. The reports were published July 23, 2026; their separately recorded sample-received dates run from February 18 to June 11, 2026. All 26 catalog strengths have an exact nominal-strength report in the COA library, with complete PDFs and every page available from the product rows.
02
Three five-test panels and blend coverage
Three reports have five-test panels: GLP-2T 30 mg, GLP-3R 10 mg and CP-TESA 10 mg. Alongside identity, purity and content, each reports a passing LAL endotoxin result against a ≤5.0 EU/mL specification and passing rapid PCR sterility against a “not detected” specification. These additional tests apply to those three reports. The remaining 23 have three-test panels. Five blend reports also preserve separate component measurements across their second pages.
03
Measured content and report-specific findings
Purity and quantity are separate results. MT-2 10 mg has 99.075% purity but measures 8.9 mg, or 89% of its label. GLOW Protocol 70 mg totals 65.63 mg: GHK-Cu 48.53 mg of 50 mg, BPC-157 8.96 mg of 10 mg and TB-500 8.14 mg of 10 mg. The Wolverine 10 mg report measures BPC-157 at 5.26 mg and TB-500 at 4.47 mg against 5 mg each. Exact report matching establishes the documented results; matching a newly shipped vial still requires its lot number.
04
Business identity and customer feedback
The merchant identifies itself as Capstone Holdings LLC, a family-run business based in Virginia. Public Accumark records name Capstone Peptides. Verisign records the domain’s original registration on May 19, 2026; reports were published July 23, while some sample-received dates precede registration. Trustpilot shows 3.7/5 from one five-star review, checked October 10, 2026. The reviewer praises communication and service. This single review offers little evidence of long-term service consistency.
05
Shipping, payments and returns
US only. FedEx 2-Day costs $12.99, free over $100 after discounts. Dispatch within one business day of payment; no weekend or holiday dispatch. All sales final; no returns or monetary refunds. Damaged, carrier-confirmed lost or incorrect orders may receive a one-time reshipment when reported within seven days. Checkout offers credit/debit cards, Apple Pay, Google Pay, Zelle and cryptocurrency. The 50% coupon, code peptideprices, reduced a $45 BPC-157 5 mg vial to $22.50 before shipping on October 10, 2026.
Strengths
26 complete reports match specific Accumark laboratory records
Three reports include endotoxin and rapid sterility results
Verified 50% coupon and clear US shipping charges
Watch-outs
Only one independent Trustpilot review
Melanotan 2 and specific GLOW components measure below label
Final sales; qualifying delivery problems receive reshipment rather than refunds
ShippingUS only. FedEx 2-Day costs $12.99, free over $100 after discounts. Dispatch within one business day of payment; no weekend or holiday dispatch.
Listed package price before coupons, any vial size. This is not the coupon-adjusted lowest 10mg price used to rank the comparison.
Cheapest$15.83
2nd cheapest$15.99
3rd cheapest$17.99
4th cheapest$18.69
5th cheapest$19.82
21 collected days and prices
Cheapest in-stock listing prices by collected day
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Vendors most often in the cheapest five
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Top 8 of 13 vendors that reached the cheapest five
Frequently asked questions
Is Capstone Peptides legit?
Capstone Peptides has 26 Accumark Labs reports that match their official laboratory records and identify the vendor. All cover identity, purity and content, and three also include endotoxin and rapid sterility results. Its 50% coupon works, and US shipping and payment terms are clear. The limited customer-review history, below-label content in specific reports and final-sale policy are the main watch-outs. Overall rating: 8.5/10. Capstone Peptides scores 8.5/10 on PeptidePrices' evidence rubric: 40% COA practices, 20% community reputation, 20% transparency, and 20% operations. Affiliate relationships are disclosed on this page and are not a scoring factor.
Does Capstone Peptides have a coupon code?
Code peptideprices gives customers 50% off. Use the PeptidePrices referral link on this page and confirm the discount at checkout.
Where does Capstone Peptides ship?
Capstone Peptides ships to United States. US only. FedEx 2-Day costs $12.99, free over $100 after discounts. Dispatch within one business day of payment; no weekend or holiday dispatch.
Does Capstone Peptides publish COAs?
COA verified. 26 Accumark reports; 26 exact catalog strengths. Identity, purity and content on all 26; three add endotoxin and sterility.
What do customer reviews say about Capstone Peptides?
Trustpilot showed 3.7/5 from 1 exact-domain reviews during PeptidePrices' latest check. Customer reviews describe service and delivery; they do not verify product identity or laboratory results.
What are alternatives to Capstone Peptides?
The public vendors closest to Capstone Peptides' 8.5/10 evidence score are Blank Peptides (8.5/10), CertaPeptides (8.5/10), and BHG Labs (8.5/10).
What is the Capstone Peptides coupon?
Use peptideprices for 50% off. The code reduced a $45 BPC-157 5 mg vial to $22.50 before shipping on October 10, 2026.
Does Capstone Peptides publish verified COAs?
Yes. All 26 complete reports match specific Accumark Labs records and name Capstone Peptides. Published July 23, 2026, they show 98.2%–99.92% headline purity. All cover identity, purity and content; GLP-2T 30 mg, GLP-3R 10 mg and CP-TESA 10 mg add endotoxin and rapid PCR sterility results.
What is Capstone’s return policy?
All sales final; no returns or monetary refunds. Damaged, carrier-confirmed lost or incorrect orders may receive a one-time reshipment when reported within seven days.
