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
Company replied
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Review summary
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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 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
Company details
- #3 of 42 best companies in Biochemical Supplier
Written by the company
Building Blocks for Breakthroughs.
Contact info
United States
- support@synthesispeptides.io
- synthesispeptides.io
4.8
Excellent
117 reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 50% of negative reviews
Typically replies within 24 hours
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Received product in a timely manner and…
Received product in a timely manner and was securely packed. I will order again .
July 4, 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
June 24, 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
Top quality product 💯 very trusted fast…
Top quality product 💯 very trusted fast shipping customer service is fast at resolving issues!!
June 26, 2026
Top teir peptides!
Id like too give a shout out to these guys From Texas! There have been a few hiccups. in my four month Journey with this great company. But they have allways went above and beyond too correct.it and make it better. That being said. There peptides have allways been amazing. Can send pics of my life changing transformation. Thank you for adding life to my years!!!
July 1, 2026
Unprompted review
Great Experience from beginning to end
Great Experience from beginning to end! Website is super easy to navigate and their customer service is top notch! Have, and will continue to recommend this company to friends and family!
Thanks again!
-Daniel
June 23, 2026
Unprompted review
Quality of the product was comparable…
Quality of the product was comparable to what I was paying for at my doctor's office and customer service was outstanding.
June 5, 2026
Unprompted review
synthesis peptides is my favorite…
synthesis peptides is my favorite source of peptides. they have fast shipping and very clean legit peptides. my parents, friends and family use them as well
May 30, 2026
So far amazing!
May 29, 2026
Quality products and fast shipping
Quality products and fast shipping
Synthesis is great to do business with
I will order again with zero hesitation !
June 1, 2026
Customer Service
I relayed my disappointment about the delayed shipping I encountered and it was reimbursed immediately. Customer service was great.
June 1, 2026
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