I have ordered from James twice now. Both times receive top notch customer service. Down to answering questions earlier in the morning than should be……had an ups issue and James jumped right in making... See more
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Review summary
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Zenith was a pleasure to deal with, UPS had a few hiccups with my order and James reached out proactively to let me know what was going on. The communication was greatly appreciated and I’ll absolutel... See more
Company replied
Great company, products showed up quickly and very competitive prices, well tested and work great! Will be back again for restock. I made a mistake ordering and owner personally corrected it, great pr... See more
Company replied
Easy to order using crypto with a nice discount using that payment method. Product sent out next business day. Label looked great. Packing was great. All products received without issue.
Company replied
Company details
Written by the company
Zenith Bioscience is a U.S.-based supplier focused on providing research-use-only peptides and related compounds. We emphasize transparent documentation, consistent labeling, and careful order handling from fulfillment through delivery. Our goal is to operate with professionalism in a space where trust and clarity matter. We prioritize clear communication, accurate order processing, and making relevant product information available so customers can make informed decisions. Zenith Bioscience is an independent company operating exclusively under this name. We welcome honest feedback and use it to continually improve our processes and customer experience.
Contact info
United States
- zenithbioscience.com
4.8
Excellent
56 reviews
No history of asking for reviews
This company hasn't invited their customers, so reviews may not be representative
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awesome expereince
I've had two orders, shipping is lightening fast, James is awesome, love the prices and the quality! What more could you want? Thank you!
June 28, 2026
Unprompted review
5 ⭐️ experience each time
I’ve ordered from Zenith a few times now and it’s always a 5 star experience. Shipping is super fast, pricing is amazing, and the products actually work. I fully trust Zenith and will continue to use this supplier!
June 24, 2026
Unprompted review
James at Zenith is the best
James at Zenith is the best. After my first order, I haven't looked back. I've yet to find a more trustworthy and transparent vendor for my research. Up to date and easy to find and navigate COAs, great pricing and top tier customer service with 2 day shipping.
June 27, 2026
Unprompted review
Love that the coa's are on the product page…
Love that the coa's are on the product page to view and you don't have to search for it, very fast answering messages. Shipping was fast and packing was excellent. Prices are affordable,Will definitely be going back for more. Thank you James for everything.
June 19, 2026
Unprompted review
Multiple orders down and everything has…
Multiple orders down and everything has been perfect every time. James really cares about his customers and his products and it shows
June 7, 2026
Unprompted review
Zenith Bioscience is the only peptide…
Zenith Bioscience is the only peptide supplier you’ll need! Excellent product, fast shipping and great customer service! Buy from a vendor that is professional, knowledgeable and truly CARES about his clients!!!
June 23, 2026
Unprompted review
Shipping was quick
Shipping was quick. Prices are more than reasonable. And product was quality. Can't recommend enough.
June 25, 2026
Unprompted review
Inventory 7x tested by Kovera Labs
Inventory 7x tested by Kovera Labs. very fair prices especially on hard to find items. Customer service also solid. Fast shipping. Full send. Thanks Zenith!
June 17, 2026
Unprompted review
Best overall company!
The shipping is insanely fast! The prices are great and the owner is so transparent with every little detail down to the stickers to package the boxes lol
June 21, 2026
Unprompted review
Safety, Customer Service, and Purity is their number one Priority
From start to door step, my experience was PERFECT! First of all, COAs, the MOST IMPORTANT! Every COA listed on each product page, the purity and actual compound levels in each are listed next to each product, these are some of the purist I have seen! EVEN the ZB BAC water has a COA, specially made in the USA for their clients! Next is pricing, you CANNOT BEAT the pricing for the purity of these research compounds. Products are easily located and easy to checkout! I personally had a wonderful experience with the owner. Safety is my number one concern and he was able to answer any and all of my questions quick, like withing 5 minutes of me reaching out. Shipping, everyone gets 2 day shipping, IT IS FAST! Quality of packaging, and the compounds, were second to none. Everything in its own little box with plastic inserts to keep them safe and then in a bubble wrap package. The quality of each product is spot on. This is only ONE of TWO companies I trust with my research materials! If you don't give them a shot, you are missing out BIG TIME!!! James, Ty for your continued caring and quality. I know that safety and purity is your number one priority! You have a customer for LIFE!!!
June 19, 2026
Unprompted review
A+ Company
Zenith is my go to source for quality products at a reasonable price. James customer service is top notch, I will continue using them for all my research needs.
April 22, 2026
Unprompted review
This was my first time ordering
This was my first time ordering, but prices were fair and shipping was fast. Will be ordering again.
June 21, 2026
Unprompted review
Good Shipping Time, Good product
I placed my order on Sunday and it came in on Wednesday. I was skeptical because of the prices but their tesamorelin and adamax have definitely worked for me.
June 10, 2026
Unprompted review
new customer
new customer, and i have to say every order has been packaged perfect, good customer service.
June 16, 2026
Unprompted review
I’m absolutely happy in how fast my…
I’m absolutely happy in how fast my order came through, I ordered on Sunday ordered received on Tuesday!! Wow awesome, the payment process was so so easy. Thank you so much!! See you soon again waiting in restock.
June 7, 2026
Unprompted review
Fair transparent customer service
Absolutely love James and zenith never an issue with any of these research compounds shipping as fast pricing is fair transparency is there he's one of my go-to's for sure
June 5, 2026
Unprompted review
Reply from Zenith Bioscience
Thank you for the support.
I'm glad you've had consistently good experiences with us. Fair pricing, transparency, and reliability are all things I work hard to maintain, so it's great to hear that stands out.
Being one of your go-to sources means a lot.
– James
Zenith Bioscience
Easy Peasy
Easy to order using crypto with a nice discount using that payment method. Product sent out next business day. Label looked great. Packing was great. All products received without issue.
May 30, 2026
Unprompted review
Reply from Zenith Bioscience
Appreciate you taking the time to leave a review.
Glad the crypto payment process was smooth and that everything arrived exactly as expected. I put a lot of attention into presentation and packaging, so it's great to hear those details stood out.
Thanks for the support.
– James
Zenith Bioscience
Great company
Great company, products showed up quickly and very competitive prices, well tested and work great! Will be back again for restock. I made a mistake ordering and owner personally corrected it, great products and service
June 3, 2026
Unprompted review
Reply from Zenith Bioscience
Thank you for the review.
I'm glad everything arrived quickly and that you were happy with the pricing and overall experience. Mistakes happen from time to time, so I'm happy we were able to get your order corrected and taken care of.
I appreciate the support and look forward to helping once the next restock is available.
– James
Zenith Bioscience
OUTSTANDING!!!
Always a pleasure ordering and experiencing the management is very helpful, treat me like family. Top of the line, outstanding business.
June 4, 2026
Unprompted review
Reply from Zenith Bioscience
Thank you for the kind words.
I always try to treat people the way I'd want to be treated, so hearing that you feel like family means a lot. I truly appreciate your continued support and trust in Zenith.
– James
Zenith Bioscience
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