Since 2004, GenScript has been offering high quality Custom Peptide and high-throughput Peptide Library services. Geared up with proprietary PepPower™ platform, GenScript becomes a leading peptide vendor, and is able to provide quality peptides with 100% guaranteed quantity at industry-leading speed, as fast as 5 days. We are delighted to share that the peptide promotion information will be timely updated. So, please stay tuned and enjoy the discounts for your peptide orders.

Note: All promotions listed below are only applicable to custom peptide services, while catalog peptide products are not included.

As the world's fastest peptide vendor, GenScript offers high quality peptide in as fast as 5 days at 100% guaranteed maximum quantity.

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Terms & Conditions

  • Both you and your friend will be enrolled in the Referral program only when he/she registers through your referral link; you both will not be rewarded otherwise.
  • The $100 GenScript coupon can only be awarded once per account through this promotion.
  • If your friend's 1st order is ≥$99, you will both receive a $10 Amazon gift card; if your friend's 1st order is ≥$999, you will both receive a $50 Amazon gift card; if your friend's 1st order is ≥$1,999, you will both receive a $100 Amazon gift card. (The currency of the AGC can be changed to £ or € on request).
  • There is no limit to the number of Amazon gift cards you can receive; the more friends you refer who place an order, the more Amazon gift cards you will receive.
  • The Amazon gift card will be sent to you and your friend via e-mail upon confirmation of your friend's first order.
  • GenScript reserves the right of final explanation for details governing this Referral Program. Please contact our customer service team ([email protected]) if you have further questions.
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Higher Purity, Less Cost now! 

FREE Upgrade purity from >70% to >75% and from >80% to >85%

Higher Purity, Less Cost now! Limited time

  • Valid for both Regular and express peptide synthesis services with a length of 4-30AA and quantity of 1-1000 mg.
  • Higher purity of >75% and >85% will be offered without extra charge when lower purity of >70% and >80% are selected, respectively.

Our customer service representatives are available 24 hours Monday through Friday. You may contact us anytime for assistance.


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