GREAT experience overall. Shipping was quick, everything arrived on time and packaged well. The ordering process was easy, and customer service was responsive. The ppl running this business truly c... See more
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Review summary
Created with AI, based on recent reviews
What people talk about most
Reviews shaping this summary
After having tried a few different companies, Synthesis is truly in a league of its own. I was impressed by the responsiveness and product quality, but truly blown away by the shipping times. When I n... See more
Company replied
Synthesis Peptides has been great to deal with. Great prices and when I had a concern the owner called me to ensure I was educated and satisfied with the product. Great to deal with. Delivery is fast... See more
Synthesis is my absolute go to for my research peptides. Consistent quality, excellent shipping time and if I had any issues the customer support team and owner responded quickly and professionally. A... See more
Company details
Written by the company
Building Blocks for Breakthroughs.
Contact info
United States
- support@synthesispeptides.io
- synthesispeptides.io
4.8
Excellent
85 reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 100% of negative reviews
Typically replies within 24 hours
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TRUST
The products are tested so we can trust what we are putting in our body. They are a phenomenal resource due to their knowledge and expertise. And their pricing is sharp. I highly recommend!
7 March 2026
Unprompted review
Fast delivery & great results
Fast delivery, safe products. I've been ordering from them for months and have zero complaints! Very happy with my results
1 April 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Glad to hear the fast delivery has been consistent and you're happy with everything after ordering for months. Appreciate you letting us know you’ve had zero complaints, that means a lot.
Looking forward to your next one!
This is the only place to order peptides
This is the only place I have and will recommend getting peptides from. Customer service is phenomenal and the product always arrives quickly!
13 February 2026
Unprompted review
Reply from Synthesispeptides
Thank you! That means a lot, really glad you're happy with the customer service and the quick deliveries. Appreciate you recommending us so strongly.
Looking forward to your next order!
Synthesis is the best site out there…
Synthesis is the best site out there for all research needs! Customer support is top notch, selection and price unparalleled. Highest quality on the market! HUGE FAN!
5 April 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Appreciate you saying we're the best for your research needs and that the customer support, selection, pricing, and quality all hit the mark. Being called a huge fan makes our day!
Looking forward to your next order!
Amazing experience with this Synthesis…
Amazing experience with this Synthesis Peptides. Christian is extremely knowledgeable and genuinely takes the time to walk you through any questions. Prices are fair, shipping was quick, and the overall service was excellent. Definitely recommend!
16 April 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Really glad you had such a great experience with us. Appreciate the kind words about Christian being knowledgeable and taking the time to help, plus the fair pricing, quick shipping, and solid service overall.
Means a lot that you'd recommend us. Looking forward to your next order!
Christian was great and products are great
Christian was great. Took his time answering all my questions. Synthesispeptides produces quality products and the shipping is really fast. I’ve referred a few people here and they are all happy. I really have trust with Christian’s products and knowledge in everything I’ve used has shown me great results.
3 May 2026
Unprompted review
Very trustworthy and deserves the reputation
Really solid guy running the business super nice and extremely punctual. He always keeps me in the loop and his products are 100% real af. Everytime I talk to him he’s heading to the post office to send out orders so I’m sure everyone would say the same things I am saying.
9 April 2026
Unprompted review
Synthesis Peptides has been an…
Synthesis Peptides has been an excellent site to work with. The quality of their products is consistently impressive, and everything reflects a high standard of care and reliability. Their customer service is outstanding—professional, helpful, and quick to respond to inquiries. Any questions I’ve had were handled promptly and clearly, which made the entire experience smooth and reassuring. It’s refreshing to find a company that combines quality products with such responsive and attentive customer care. Highly recommended.
16 April 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Really glad to hear you've had such a smooth and positive experience with us. Appreciate you highlighting the consistent quality and how responsive our customer service has been, that means a lot.
Thanks for the strong recommendation and for choosing us. Looking forward to your next order!
Best Ever!
Have been using various peptides for several months through Synthesis Peptides and could not be happier. I have been able to stop my RX meds and feel normal again! I have use BPC 157/TB500 for arthritis, GHK Cu injectable and serum and noticed an improvement in fine lines on my face, and ML2 for a natural base tan. Shipping is super fast and I have had the BEST customer service. Would refer to anyone wanting to buy peptides hands down!
24 December 2025
Unprompted review
Shipping Times = 10/10
After having tried a few different companies, Synthesis is truly in a league of its own. I was impressed by the responsiveness and product quality, but truly blown away by the shipping times. When I need a product, I want it asap and Synthesis has exceeded expectations each time. They've found a customer for life.
1 May 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Really glad to hear we stood out for you compared to the others. Appreciate you calling out the responsiveness, product quality, and especially how fast the shipping has been each time.
Means a lot that you've become a customer for life. Looking forward to your next order!
Excellent Experience!
This company quite literally changed my life, no exaggeration. The team is extremely knowledgeable and always willing to offer advice and guidance. Shipping is quick and have never had any issues whatsoever with product quality. Highly recommended
1 November 2025
Unprompted review
The best in the game
The best in the game. You’re selling yourself short if you waste time elsewhere.
4 May 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Appreciate the kind words and the strong recommendation. Glad we've been hitting the mark for you.
Looking forward to your next order!
Great product and service
Prices are great. The support has been awesome as well compared to the other sites I've been too. Definitely coming back. Happy rats
20 April 2026
Unprompted review
Reply from Synthesispeptides
Thank you! Glad the prices and support have been a step above the others for you. "Happy rats" made me smile 😂
Appreciate you coming back and looking forward to the next order!
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