Greatest Peptides
Updated Oct 31, 2026
01At a glance
4 of 5
Named lab · Lot COA · HPLC · Mass spec · Outside tested
Accessible
No warning letter, no copied name
02Testing
Freedom Diagnostics (named in its footer)
HPLC and LC-MS on every lot, endotoxin screened, batch-specific COA
The store does not say.
Purity by HPLC and identity by mass spectrometry, as the store describes it.
03Prices
Prices run 9% below the median.
30 comparable compound and size pairs
Sep 28, 2026Oct 31, 2026
14% below market on Sep 28, 2026, 9% below on Oct 31, 2026.
Carries 23 of our compounds (35 listings)
100% of listings in stock; prices checked 31 Oct 2026
| Compound | Lead size | Store $/mg | Market median $/mg | Difference |
|---|---|---|---|---|
| Tirzepatide | 10 mg | $5.50 | $7.00 | -21% |
| Retatrutide | 10 mg | $8.00 | $7.95 | 1% |
| Semaglutide | 10 mg | $4.00 | $6.90 | -42% |
| BPC-157 | 10 mg | $5.00 | $5.50 | -9% |
| GHK-Cu | 50 mg | Not comparable | $0.80 | Not comparable |
| NAD+ | 500 mg | $0.11 | $0.14 | -21% |
| TB-500 / Thymosin Beta-4 | 10 mg | $6.50 | $6.40 | 2% |
| AOD-9604 | 5 mg | Not comparable | $9.80 | Not comparable |
| CJC-1295 (no DAC) + GHRP-2 blend | 10 mg | Not comparable | $7.50 | Not comparable |
| Dihexa | 10 mg | $5.50 | $5.00 | 10% |
| DSIP (Delta Sleep-Inducing Peptide) | 5 mg | Not comparable | $7.00 | Not comparable |
| HCG (Human Chorionic Gonadotropin) | Not comparable | Not comparable | Not comparable | Not comparable |
| IGF-1 LR3 | 1 mg | $109.99 | $71.00 | 55% |
| Kisspeptin | 10 mg | $3.50 | $5.50 | -36% |
| KPV | 10 mg | $3.50 | $5.20 | -33% |
| Lipo-C (MIC blend) | 216 mg | Not comparable | Not comparable | Not comparable |
| MOTS-c | 10 mg | $4.00 | $5.00 | -20% |
| PT-141 (Bremelanotide) | 10 mg | $3.00 | $4.30 | -30% |
| Selank | 10 mg | $3.50 | $4.50 | -22% |
| Semax | 10 mg | $4.50 | $4.50 | 0% |
| Sermorelin | 10 mg | $5.00 | $6.90 | -28% |
| SNAP-8 (Acetyl Octapeptide-3) | 10 mg | $3.20 | $3.50 | -9% |
| Tesamorelin | 10 mg | $8.50 | $7.40 | 15% |
04Vendor Watch
Site answered Nov 1, 2026
05Company and payment
How you can pay
Accepts credit cards: Yes
Visa, Mastercard, Amex, Discover, JCB (product page and footer)
Who's behind it
Greatest Peptides LLC
1100 Town and Country Rd, Ste 1250, Orange, CA 92868
812-PEPTIDE
Small catalog (about 22 products) with unusually long documentation pages; runs a partner program
06Dates
- Prices last read
- Oct 31, 2026
- Profile last reviewed
- Oct 19, 2026
- Slice generated
- Nov 2, 2026