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
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Synthesis Peptides are the type of company, that all companies should aspire to be like, the customer service is second to none, post sale I might add. There was a small problem with my order. I raise... See more
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
Company details
Written by the company
Building Blocks for Breakthroughs.
Contact info
United States
- support@synthesispeptides.io
- synthesispeptides.io
4.9
Excellent
109 reviews
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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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Christian was responsive and…
Christian was responsive and knowledgeable. Order came quick too.
13 July 2026
A reliable company with great products…
A reliable company with great products and phenomenal customer service. Highly recommend giving them a try.
13 July 2026
Shipping is quick and everything is good
11 July 2026
I was kept informed about shipping and…
I was kept informed about shipping and came in a timely manner.
Good value for strength that I wanted.
10 July 2026
I would never buy peptides somewhere…
I would never buy peptides somewhere else. This is the best place.
10 July 2026
Product delivered very fast
8 July 2026
This company has an 4.8 rating for a…
This company has an 4.8 rating for a very good reason.
Easy website to navigate through. Extremely educational and no fluff. Fast delivery and product was not tampered with.
You can also get the GLP-1s in pill form through him as well.
An amazing experience with this company. Products work best to the ones that follow the protocol of adding a good clean diet and some exercise.
12 July 2026
Unprompted review
My GLP-3r came in about 3 days from…
My GLP-3r came in about 3 days from when I order it. The seal wasn’t broke and the product didn’t turn cloudy when adding the Bac water to it. The My GLP-3r came in about 3 days from when I order it. The seal wasn’t broke and the product didn’t turn cloudy when adding the Bac water to it. I love the website because it’s informative and extremely easy to navigate.
The owner was extremely cool when I did have an issue with my product that I ordered.
He has amazing products that you definitely will see the best results from. If one doesn’t work for you like to expected it to. Definitely reach out to him and he will help you to find what might work for you.
This is an excellent and honest company. There are not that many out there that are. This company is definitely one of them 100% is on point and affordable compared to other companies.
I love the website because it’s informative and extremely easy to navigate.
The owner was extremely cool when I did have an issue with my product that I ordered.
He has amazing products that you definitely will see the best results from. If one doesn’t work for you like to expected it to. Definitely reach out to him and he will help you to find what might work for you.
This is an excellent and honest company. There are not that many out there that are. This company is definitely one of them 100%
12 June 2026
Unprompted review
Synthesis is my absolute go to for my…
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. And pricing is more than fair !!
1 July 2026
I have been ordering for about a year…
I have been ordering for about a year now and every experience positive.
6 July 2026
These have helped so much game changer…
These have helped so much game changer thank you highly recommended.
12 January 2026
Unprompted review
Received product in a timely manner and…
Received product in a timely manner and was securely packed. I will order again .
4 July 2026
Great company
I’m only a few weeks in so I can’t really comment on the product just yet except for the powders visual attributes are on point and the customer service is amazing
24 June 2026
Reply from Synthesispeptides
Thank you for taking the time to leave a review, Dr. Fedder.
We're truly sorry to hear your package never arrived. We take delivery issues very seriously and have a free replacement policy in place for any lost, stolen, or damaged orders.
I’ve already reached out to you via email to resolve this right away. I can have a replacement shipped out as soon as tomorrow, along with some extras for the inconvenience.
Please reply to my email so we can get this sorted quickly and make things right for you.
We appreciate your business and want to earn back your trust.
Christian
Synthesis Peptides
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