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Research Use Only. Products listed are not for human or animal consumption. Statements have not been evaluated by the FDA.View full disclaimers →
Last checked by Adam Dan
Synthesis Peptides is a U.S. research peptide supplier launched in 2026. It links 23 COA reports, but its prices sit above the market median.
Exclusive Synthesis Peptides offer
10% off with coupon
Before you order
Size 50 mg
In stock
$0.67/mg · seen 7w ago
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Size 10 mg
Size
In stock
$5.40/mg · seen 7w ago
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Size 10 mg
In stock
$5.76/mg · seen 7w ago
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Size 10 mg
Size
In stock
$5.85/mg · seen 7w ago
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Size 1,500 mg
In stock
$0.044/mg · seen 7w ago
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Size 10 mg
In stock
$6.75/mg · seen 7w ago
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Size 10 mg
Size
In stock
$3.33/mg · seen 7w ago
View COA
Size 10 mg
In stock
$6.75/mg · seen 7w ago
View COA
Size 10 mg
Size
In stock
$4.50/mg · seen 7w ago
View COATested by Not publicly stated
Based in the U.S., Synthesis Peptides sells peptides for laboratory research and started trading in 2026. We track 36 of its listings across 25 compounds, and 35 were in stock when we last checked prices in September. Some products come in several strengths; Retatrutide, for example, is sold in three. Synthesis Peptides describes its shipping as same-day before 12 PM PST; 1–3 business days priority. Most of its listings are for Retatrutide, MOTS-c, Semax, Selank and Tirzepatide. At checkout it takes Visa, Mastercard, Amex, Discover and PayPal. Its product pages here carry 23 separate lab reports. Each report speaks for a single batch, so compare its lot number with the one on your vial. PepLookup isn't the seller here: you order on Synthesis Peptides' site, and its products are meant for laboratory research only.
If you shop on price alone, Synthesis Peptides is rarely the first stop. At our last check it was at or above the market median on 18 of the 24 compounds we could compare. Selank is the one to watch, at about 43% under the median. 23 lab reports back up the listings. On speed, it promises same-day before 12 PM PST. At checkout, PEPLOOKUP knocks 10% off.
Synthesis Peptides is at the expensive end of what we track. Its strongest prices were on Selank (43% cheaper than most sellers), Semax (37% cheaper than most sellers) and SS-31 (Elamipretide) (21% cheaper than most sellers). Its weakest prices were on Tirzepatide (69% dearer than most sellers), TB-500 (35% dearer than most sellers) and GHK-Cu (35% dearer than most sellers). The comparison pages put it next to 84 other suppliers, so it takes a minute to check a specific compound.
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