Peak Peptides reviews
Peak Peptides at a glance
- PepFinder Score
- 7.1/10
- Based in
- United States
- Products tracked
- 55 across 37 peptides
- Price level
- 23% above the US market median
- Testing evidence
- Stated by the store, no certificates on file
- Verified store
- Not yet
- Last checked
- 8 Nov 2026
PepFinder currently tracks 55 products from Peak Peptides across 37 peptides. Its listed prices per mg are 23% above the US market median, across 48 listings we could compare. The cheapest listing we track is US$37.50. PepFinder last read its listings on 8 Nov 2026.
PepFinder rating
Out of 10
Customer rating
No customer reviews yet
Own this business? Claim this profile — free; reply to reviews and keep your details current.
Best for: Large product selection
- Large range with 55 listed products
- Accepts card payments, which carry chargeback protection
- Has not completed PepFinder verification (most suppliers have not)
How its prices compare · 48 listings checked against the market
We may earn a commission. How this works
Peak Peptides review: what we found
Last checked 8 Nov 2026 · All sources
What PepFinder checked
Observed by our checks or taken from public records
What the store says
The store's own statements, not checked by PepFinder
- The supplier states its products are independently tested: “…Research-Grade Peptides, Third-Party Tested .…”States independent testing ↗ · 24 Sept 2026
- The supplier's website links to certificates of analysis or lab results. Documents are not reviewed until an editor checks them.Links a COA / lab results page ↗ · 24 Sept 2026
- Business location: US (as stated on the supplier's website, reviewed by PepFinder)Business location ↗ · 9 Oct 2026
- The website links to its refund policy page.Linked policy page ↗ · 24 Sept 2026
- The website publishes an email address and a phone number.Publishes contact details ↗ · 24 Sept 2026
Not yet known
Gaps in the record, not faults
- Whether its testing claims hold up: we have not yet seen and reviewed one of its certificates.
- Not yet found on its website: shipping destinations, customer support channels, domain age, testing laboratory.Details
- What ordering is like: no PepFinder customer has reviewed it or reported an order yet.
PepFinder has not bought from or tested this store's products. Request a correction with evidence.
No customer reviews of Peak Peptides yet
Ordered from Peak Peptides? A review or a short report of dispatch, delivery, payment or support helps the next buyer. Reviews are moderated; the store can reply but not remove them.
Rating by category
How we rate- Product selection
- 9.0 / 10
- Value
- 4.7 / 10
- Reliability
- 7.0 / 10
- Delivery
- 10.0 / 10
- Customer service
- 5.0 / 10
- Payment options
- 8.5 / 10
- Review sentiment
- Not enough data
- Testing and traceability
- 5.6 / 10
- Information availability
- Good
Why does PepFinder say this?
We can show a source for 11 of the 15 facts that matter about a store (who runs it, contact details, shipping, payments, testing, prices). Not yet confirmed: shipping destinations, customer support channels, domain age, testing laboratory. “Not confirmed” means we have not found it, not that the answer is no. See sources.
Popular products
Checked 8 Nov 2026| Product | Supplier price |
|---|---|
| US$350.00 US$7.00/mg 5% above average | |
| US$90.00 US$0.90/mg 29% above average | |
| US$65.00 US$1.30/mg 54% below average | |
| US$90.00 US$9.00/mg 55% above average | |
| US$52.50 US$10.50/mg 8% below average | |
| US$165.00 US$8.25/mg 4% above average |
We may earn a commission. How this works
Prices as listed by the supplier when we last checked; the supplier confirms the final price. “vs market” compares price per mg with the median across tracked suppliers listing the same peptide in the same currency and serving this store's region, never converted.
How its prices compare
Peak Peptides lists in USD. We compared 48 of its 55 listings with the median price per mg across the other stores that list the same peptide in USD and serve the US (15 to 186 stores per product). Prices are never converted between currencies, so this is a like-for-like comparison for a buyer in the US.
Taken together, its typical listing sits 23% above that market median. Behind that: 15 products priced below most stores, 1 within 5% of the median, and 32 products priced above most stores. A store is rarely the cheapest or the dearest on everything, so the product you want matters more than the overall figure.
Priced below most stores (15)
| Product | Price | vs market median |
|---|---|---|
| Epitalon 50 MG | US$50.00 | 67% below |
| 5-Amino-1MQ 50 MG | US$65.00 | 54% below |
| Retatrutide 40 MG | US$155.00 | 42% below |
| L-Carnitine 600 MG | US$37.50 | 40% below |
| BPC-157 20 MG | US$70.00 | 40% below |
| DSIP 15 MG | US$60.00 | 39% below |
And 9 more in the full catalogue below.
Priced above most stores (32)
| Product | Price | vs market median |
|---|---|---|
| Epitalon 10 MG | US$70.00 | 133% above |
| Melanotan II 10 MG | US$90.00 | 125% above |
| Retatrutide 10 MG | US$150.00 | 125% above |
| Semax 10 MG | US$85.00 | 113% above |
| Humanin 10 MG | US$200.00 | 100% above |
| PT-141 10 MG | US$85.00 | 93% above |
And 26 more in the full catalogue below.
Price per mg lets vials of different sizes be compared. A higher price can reflect a smaller vial, included shipping, or testing the store pays for; the per-peptide price pages show every store side by side. Prices are as the store listed them when we last checked.
Pros and things to consider
Pros
- Large range with 55 listed products
- Accepts card payments, which carry chargeback protection
- Refund or returns policy published
Things to consider
- Has not completed PepFinder verification (most suppliers have not)
From PepFinder's own checks of the supplier's website and public records. “Not confirmed” means we have not found it yet. Request a correction.
About Peak Peptides
Who they are and what they sell
Peak Peptides is based in the United States. It lists 55 products across 37 peptides. Shipping countries are not stated. It accepts Visa, Mastercard, American Express, Bank transfer, Cryptocurrency and Card. Its PepFinder Score is 7.1 out of 10. It has no customer reviews on PepFinder yet. PepFinder last read its website on 8 Nov 2026.
Peak Peptides is a research-peptide store based in United States. We track 55 of its listings across 37 peptides, including GHK-Cu, Retatrutide, Tesamorelin, BPC-157, DSIP and Epitalon. It has no customer reviews on PepFinder yet.
To see whether Peak Peptides is good value, compare its prices per mg with other stores on GHK-Cu prices in the US, Retatrutide prices in the US and Tesamorelin prices in the US. The “Is Peak Peptides legit?” checks below cover contact details, payment, delivery and testing. Before a first order, read how to read a peptide COA and compare other suppliers in the US.
Store and verification
Unclaimed · 8 legitimacy checks
Store information
- Trading name
- Peak Peptides
- Location
- United States
- First tracked by us
- 24 Sept 2026
- Estimated time active
- Not known
- support@peakpeptides.shop
- Phone
- +13109358573
Is Peak Peptides legit? What we can check
No website can promise that a supplier is trustworthy. These are the checks we can make from public records, the supplier’s own website and our reviews. They are the same checks as in our guide to spotting an unreliable supplier.
Website history (Not known)
Domain age not yet recorded.
Ways to get in touch (Not known)
Contact channels not yet recorded.
Written policies (In place)
Refund policy and terms published.
Independent testing (Not known)
Peak Peptides states that its products are independently tested, links a certificates-of-analysis or lab-results page. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
PepFinder verification (Not known)
Not verified. Most suppliers are not; verification is voluntary.
Regulator notices and warnings (In place)
None found in our records.
Card payments (In place)
Card payment shown on the website, which usually allows a chargeback if an order goes wrong.
Customer reviews (Not known)
No reviews on PepFinder yet.
Own this business? Claim this profile — free; reply to reviews and keep your details current.
Shipping and payments
Delivery: Standard domestic delivery takes 1–2 business days. · 6 payment methods
Shipping, payment and policies
- Delivery estimate (stated)
- Standard domestic delivery takes 1–2 business days.
- Shipping policy clear
- Not yet assessed
- Payment methods
- VisaMastercardAmerican ExpressBank transferCryptocurrencyCard
- Card payments
- ✓ Yes
- Refund policy
- Published
- Refund policy clear
- Not yet assessed
- Terms of sale
- Published
- Privacy policy
- Published
Testing and certificates of analysis
Peak Peptides states that its products are independently tested, links a certificates-of-analysis or lab-results page. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
Testing transparency
- Certificates of analysis
- Testing claimed, not reviewedSupplier claims
Peak Peptides states that its products are independently tested, links a certificates-of-analysis or lab-results page. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
- Batch-specific COAs
- Not yet assessed
- States third-party testing
- ✓ Yes
- Laboratories named by the supplier
- None found
- Lab accreditation identifiable
- Not yet assessed
- Batch numbers public
- ✓ Yes
- Manufacturing/source location disclosed
- Not yet assessed
- Testing documents we hold
- None yet
We record what testing documents state and where they came from. We do not test products, and a certificate is not evidence that a product is safe for any use.
Full catalogue (55 products)
Every listing we track, with search, price per mg and price history
Listed catalogue and prices
55 products · last checked 8 Nov 2026| Product (as listed) | Price | Per mg | Stock |
|---|---|---|---|
| US$65.00 50 MG | US$1.30 | ||
| US$70.00 100 MG | US$0.70 | ||
| US$45.00 5 MG | US$9.00 | ||
| US$70.00 10 MG | US$7.00 | ||
| US$90.00 10 MG | US$9.00 | ||
| US$70.00 20 MG | US$3.50 | ||
| US$70.00 10 MG | US$7.00 | ||
| US$90.00 10 MG | US$9.00 | ||
| US$45.00 10 MG | US$4.50 | ||
| US$60.00 15 MG | US$4.00 | ||
| US$175.00 10 MG | US$17.50 | ||
| US$70.00 10 MG | US$7.00 | ||
| US$50.00 50 MG | US$1.00 | ||
| US$60.00 60 MG | US$1.00 | ||
| US$90.00 90 MG | — | ||
| US$90.00 100 MG | US$0.90 | ||
| US$79.99 As listed | — | ||
| US$39.99 As listed | — | ||
| US$45.00 As listed | — | ||
| US$175.00 70 MG | US$2.50 | ||
| US$220.00 105 MG | — | ||
| US$100.00 1500 MG | US$0.07 | ||
| US$110.00 10,000 IU | — | ||
| US$40.00 75 IU | — | ||
| US$200.00 10 MG | US$20.00 | ||
| US$100.00 1 MG | US$100.00 | ||
| US$70.00 10 MG | US$7.00 | ||
| US$200.00 80 MG | US$2.50 | ||
| US$90.00 10 MG | US$9.00 | ||
| US$45.00 10 MG | US$4.50 | ||
| US$37.50 600 MG | US$0.06 | ||
| US$100.00 10 MG | US$10.00 | ||
| US$80.00 10MG | US$8.00 | ||
| US$200.00 40 MG | US$5.00 | ||
| US$90.00 10 MG | US$9.00 | ||
| US$100.00 500 MG | US$0.20 | ||
| US$165.00 1000 MG | US$0.17 | ||
| US$85.00 10 MG | US$8.50 | ||
| US$150.00 10 MG | US$15.00 | ||
| US$190.00 15 MG | US$12.67 | ||
| US$220.00 20 MG | US$11.00 | ||
| US$270.00 30 MG | US$9.00 | ||
| US$155.00 40 MG | US$3.88 | ||
| US$350.00 50 MG | US$7.00 | ||
| US$52.50 5 MG | US$10.50 | ||
| US$160.00 50 MG | US$3.20 | ||
| US$85.00 10 MG | US$8.50 | ||
| US$85.00 10 MG | US$8.50 | ||
| US$90.00 10 MG | US$9.00 | ||
| US$100.00 10 MG | US$10.00 | ||
| US$130.00 15 MG | US$8.67 | ||
| US$165.00 20 MG | US$8.25 | ||
| US$50.00 10 MG | US$5.00 | ||
| US$70.00 10 MG | US$7.00 | ||
| US$150.00 20 MG | US$7.50 |
The supplier confirms the final price and availability when you order. Product names, photos, quantities and prices are as publicly listed by the supplier; photos load from the supplier’s own website. “vs market” compares price per mg with the median across tracked suppliers listing the same peptide in the same currency; prices are never converted between currencies. We do not sell these products and give no guidance on their use.
Sources and evidence
Where each fact came from · information availability: good
Evidence Coverage: 78%
What we know about this supplier, and whether we can show you where it came from. “Not known” means we have not found it, not that the answer is no.
| Fact | Status | Last observed |
|---|---|---|
| Business location | Known, sourced | 30 days ago |
| Contact details | Known, sourced | 45 days ago |
| Shipping destinations | Not known | — |
| Stated delivery time | Known, sourced | 30 days ago |
| Payment methods | Known, sourced | 45 days ago |
| Customer support channels | Not known | — |
| Refund or returns policy | Known, sourced | 45 days ago |
| Terms of sale | Known, sourced | 45 days ago |
| Domain age | Not known | — |
| Certificates of analysis | Known, sourced | 45 days ago |
| Independent testing | Known, sourced | 45 days ago |
| Testing laboratory | Not known | — |
| Public batch numbers | Known, sourced | 45 days ago |
| Product catalogue | Known, sourced | 4 hours ago |
| Prices | Known, sourced48 of 55 listed prices can be compared per mg | 4 hours ago |
Evidence and sources
| Topic | Claim | Basis | Source type | Captured | Last checked | Source |
|---|---|---|---|---|---|---|
| Shipping policy | Business location: US (as stated on the supplier's website, reviewed by PepFinder) | Supplier-stated | Supplier website | 1 Oct 2026 | 30 days ago | Business location |
| Certificates of analysis | The supplier's website links to certificates of analysis or lab results. Documents are not reviewed until an editor checks them. | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | Links a COA / lab results page |
| Certificates of analysis | Batch or lot numbers appear on the supplier's pages: “…Lot: PP-GLP10-2026.…” | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | Shows batch or lot numbers |
| Testing claim | The supplier states its products are independently tested: “…Research-Grade Peptides, Third-Party Tested .…” | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | States independent testing |
| Shipping policy | The website states: “…Standard domestic delivery takes 1–2 business days.…” | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | States a delivery time |
| Refund policy | The website links to its refund policy page. | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | Linked policy page |
| Terms | The website links to its terms page. | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | Linked policy page |
| Pricing | 55 peptide listings read from the supplier's own catalogue. Prices and stock are as the site listed them at capture. | Supplier-stated | Supplier website | 24 Sept 2026 | 4 hours ago | Supplier's public product catalogue |
| Contact details | The website publishes an email address and a phone number. | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | Publishes contact details |
| Other | The website links to its privacy page. | Supplier-stated | Supplier website | 24 Sept 2026 | 45 days ago | Linked policy page |
Verified fact: checked by us against an independent source. Supplier-stated: what the supplier says, not independently confirmed. User report: submitted by a user. Editorial assessment: our judgement. Spotted an error? Request a correction.
Supplier history
- 7 Nov 2026CatalogueNew listing: GHK-CU Dissolvable Tongue Strips (90 MG) (90 MG)
- 3 Nov 2026CatalogueRelisted: GLP3-R (40 MG) (40 MG)
- 31 Oct 2026CatalogueNew listing: Glow Blend Dissolvable Strips (105 MG) (105 MG)
- 19 Oct 2026CatalogueNo longer listed: GLP3-R (40 MG) (40 MG)
- 15 Oct 2026CatalogueNew listing: HUMANIN (10 MG) (10 MG)
- 28 Sept 2026ScoreTransparency Score changed from 5.2 to 6.7Scoring methodology updated
- 28 Sept 2026CatalogueRelisted: TESAMORELIN (15 MG) (15 MG)
- 28 Sept 2026CatalogueNew listing: GLP3-R (20 MG) (20 MG)
- 28 Sept 2026CatalogueNew listing: GLP3-R (40 MG) (40 MG)
- 28 Sept 2026CatalogueNew listing: GLP3-R (50 MG) (50 MG)
- 28 Sept 2026CatalogueNew listing: GLUTATHIONE (1500 MG) (1500 MG)
- 28 Sept 2026CatalogueNew listing: HCG (10,000 IU) (10,000 IU)
- 28 Sept 2026CatalogueNew listing: HMG (75 IU) (75 IU)
- 28 Sept 2026CatalogueRelisted: IGF-1 LR3 (1 MG) (1 MG)
- 28 Sept 2026CatalogueRelisted: IPAMORELIN (10 MG) (10 MG)
- 28 Sept 2026CatalogueRelisted: KISSPEPTIN (10 MG) (10 MG)
- 28 Sept 2026CatalogueNew listing: KLOW BLEND (80 MG) (80 MG)
- 28 Sept 2026CatalogueRelisted: KPV (10 MG) (10 MG)
- 28 Sept 2026CatalogueNew listing: L-Carnitine (600 MG) (600 MG)
- 28 Sept 2026CatalogueRelisted: MELANOTAN II (10 MG) (10 MG)
- 28 Sept 2026CatalogueRelisted: MOTS-C (10MG) (10MG)
- 28 Sept 2026CatalogueRelisted: MOTS-C (40 MG) (40 MG)
- 28 Sept 2026CatalogueNew listing: NAD+ (1000 MG) (1000 MG)
- 28 Sept 2026CatalogueNew listing: NAD+ (500 MG) (500 MG)
- 28 Sept 2026CatalogueNew listing: Copper Peptide Serum & Cream Bundle
- 28 Sept 2026CatalogueRelisted: PT-141 (10 MG) (10 MG)
- 28 Sept 2026CatalogueRelisted: SELANK (10 MG) (10 MG)
- 28 Sept 2026CatalogueRelisted: SEMAX (10 MG) (10 MG)
- 28 Sept 2026CatalogueNew listing: SLU-PP-332 (5 MG) (5 MG)
- 28 Sept 2026CatalogueRelisted: SS-31 (50 MG) (50 MG)
How PepFinder rates suppliers
What the rating and the customer rating each measure
The PepFinder rating (out of 10) is our own assessment of a supplier across reliability, product selection, pricing, delivery, customer service, website, payment options, packaging and how much information the supplier makes available. Each part is scored from what we can observe on its website, from public records and from customer reviews; parts we cannot observe are left unscored rather than marked down, and the rating is only shown once enough of them are known. It can move as more of the inputs become available.
The customer rating (out of 5 stars) is simply the average of approved customer reviews, shown from three reviews. Reviews are moderated before publication and suppliers can reply but not remove them.
The price comparison puts each listing's price per milligram against the median across every tracked supplier listing the same peptide in the same currency and serving the same region, so a UK store is measured against stores a UK buyer could order from. Prices are never converted between currencies. Suppliers cannot pay to change any of this; claiming or verifying a profile does not change the rating either.
Transparency Score
Out of 10 · methodology v1 · updated 9 Oct 2026 · 53% of criteria assessed
Testing, documentation and business transparency. Separate from the PepFinder Score. Paid plans and sponsorship cannot change it. How it is calculated
Show every factor
Testing transparency — 4.6
- ◐ Links a certificates-of-analysis page (not yet reviewed by us)12.5/25
- ? COAs are batch-specificnot assessed
- ✓ States third-party (independent) testing20/20
- ✕ Names the testing laboratories0/10
- ? Laboratory accreditation is identifiablenot assessed
- ✕ COAs reviewed by us in the last 12 months0/15
Contact transparency — 10.0
- ✓ Contact details are public15/15
- ? Manufacturing/source location disclosednot assessed
Documentation — 5.5
- ✓ Sourced evidence on record40/40
- ✕ Share of evidence independently verified0/30
- ✓ Batch numbers are public15/15
- ✕ A testing document checked in the last 6 months0/15
User reviews
No approved reviews yet.
Customer service
Not yet assessed by the editorial team.
Shipping transparency — 5.0
- ? Shipping policy is clearnot assessed
- ✓ Delivery estimate stated30/30
- ✕ Shipping destinations listed0/30
Longevity
No domain record or founding date researched yet.
Policy transparency — 10.0
- ? Refund policy is clearnot assessed
- ? Terms of sale are clearnot assessed
- ✓ Refund or returns policy published20/20
- ✓ Terms of sale published20/20
- ✓ Privacy policy published20/20
Compare Peak Peptides with other suppliers
| Supplier | Rating | Customer rating | Prices | Products | |
|---|---|---|---|---|---|
 Limitless Biotech | 5.4 | No reviews yet | 13% above | 293 | Visit store |
 Nationwide Peptides | 6.5 | No reviews yet | 6% above | 134 | Visit store |
 Apex Laboratory | 8.0 | 5.0(1) | Not enough data | 139 | Visit store |
We may earn a commission. How this works
Peak Peptides vs Limitless BiotechPeak Peptides vs Nationwide PeptidesPeak Peptides vs Apex LaboratoryAll alternatives to Peak Peptides
Peak Peptides: common questions
Is Peak Peptides legit?
We cannot vouch for any supplier, but we can report what the record shows. Peak Peptides meets 3 of the 8 checks we make, with nothing flagged. Each check, and its source, is listed on this page.
Where is Peak Peptides based?
Our records place Peak Peptides in United States.
Does Peak Peptides publish certificates of analysis?
Peak Peptides states that its products are independently tested, links a certificates-of-analysis or lab-results page. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
What payment methods does Peak Peptides accept?
The website shows: Visa, Mastercard, American Express, Bank transfer, Cryptocurrency, Card.
How long does Peak Peptides take to deliver?
Peak Peptides states: "Standard domestic delivery takes 1–2 business days.".
Ready to shop at Peak Peptides?
- Large range with 55 listed products
- Accepts card payments, which carry chargeback protection
We may earn a commission. How this works
Own this business? Claim this profile — free; reply to reviews and keep your details current.
Run Peak Peptides? Add a free PepFinder badge to your website.
Something wrong on this page? Request a correction with evidence.
This page provides supplier and market information only and is not medical advice. Disclaimer