Absolutely loving my results from Reta, MOTC, and NAD+ and I am even doing lower doses and many online BROS recommend. I did a lot of research before hand for quality 3rd party lab testing with great... See more
Company replied
While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
Review summary
Created with AI, based on recent reviews
What people talk about most
Reviews shaping this summary
The website is straightforward and easy to navigate. The prices are better than most other sites. I got a text message asking if I had any questions or concerns. Shipping was quick and I received a... See more
Company replied
I started with Northline Labs a few months ago with one peptide. I was impressed with their customer care and their speed with getting me my product. Also their quality is like no other I’ve had befor... See more
Company replied
I couldn’t recommend Northline labs’s more. They are the best in the game, in my opinion. To list a few reasons—they offer high quality peptides (third party tested), amazing customer service, in-dept... See more
Company replied
Company details
Written by the company
Northline Labs is an independent United States supplier of research-grade peptides and bacteriostatic water. We work with researchers, laboratory professionals, and biotech operators who need consistent quality and predictable supply. Every batch we ship is third-party verified at 99%+ purity. The Certificate of Analysis for each lot is published on the corresponding product page before the order moves — no waiting, no requesting. Weekday orders typically ship same-day via UPS, and we run a standing buy-one-get-one-50%-off offer across the catalog. We answer customer emails in hours rather than days, and we read every reply. Lot quality, transparency, and responsive support are the three things we work hardest to never miss — and the reason most of our customers come back.
Contact info
United States
- northlinelabs.org
4.7
Excellent
377 reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 90% of negative reviews
Typically replies within 1 month
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Fast delivery easy checkout easy site…
Fast delivery easy checkout easy site to navigate amazing company
May 20, 2026
Unprompted review
Reply from Northline Labs
Thank you, Jesse! Fast delivery, easy checkout, and a site that's simple to navigate is exactly what we want. We appreciate the kind words!
Great company to work with
Great company to work with, easy ordering, fast delivery arrived within 3 days will use again, keep up the good work.
June 10, 2026
Unprompted review
Reply from Northline Labs
Thank you, Mandy! Easy ordering and 3-day delivery — exactly what we aim for. We'll keep it up, and we appreciate you coming back!
Quick shipping
Quick shipping. Pricy cane in professional looking goal. Looks like we got just what we ordered
June 1, 2026
Unprompted review
Reply from Northline Labs
Thank you, Kristy! Quick shipping and professional packaging, exactly as ordered — that's what we like to hear. Appreciate you!
Great customer service
When I received my first order with this company, it was incorrect. However, they rectified it almost immediately. Since then, all my orders have come quickly and correct.
May 27, 2026
Unprompted review
Reply from Northline Labs
Thank you! We're glad we could fix that first order right away — and even happier everything's been quick and correct since. That's exactly how we want to show up. We appreciate you!
The shipping is quick
The shipping is quick. I had a question with my order and they responded quickly to my email. I’ve placed 2 orders and getting ready to place my 3rd.
May 12, 2026
Unprompted review
Reply from Northline Labs
Thank you, Miranda! Quick shipping and fast support — glad we could help with your question. Three orders in, we're grateful to have you and here's to many more!
I am fairly new to peptides and since I…
I am fairly new to peptides and since I have found Northline Labs it has made the process and the cost so much easier. Their customer service is amazing, they email you back right away, they are helpful and curious. I have referred 3 friends and they all love it too!!
May 15, 2026
Unprompted review
Reply from Northline Labs
Thank you, Tianna! Making the process and cost easier, plus quick and helpful email support, is exactly what we go for — and referring 3 friends means the world to us. We appreciate you!
So far so good
So far so good! Fast shipping with tracking updates throughout the process.
May 28, 2026
Unprompted review
Reply from Northline Labs
Thank you, Mikki! Fast shipping with tracking updates the whole way — that's exactly the experience we want. Glad it's off to a great start, and we appreciate you!
Satisfied
I have now ordered from Northline a few times and my order has always arrived quickly and with accuracy. I will continue to give my business to them.
March 9, 2026
Unprompted review
Reply from Northline Labs
Thank you, April! Quick and accurate on every order — that's exactly what we aim for. We're grateful for your continued business!
Great company with great products,,I…
Great company with great products,,I received my product in super fast time
December 27, 2025
Unprompted review
Reply from Northline Labs
Thank you, James! Great products and super-fast shipping — exactly what we strive for. We appreciate you!
Easy to order
Easy to order. They sent a follow up email right away with my tracking number. It did not arrive on its original date stated but when I emailed the company they relied within an hour with things get delayed. Let's wait until monday and we will go from there. They were right and it came the within the next 2 days. It is literally just the peptide with o instructions so prepare for that. I would order from thos company again though.
June 5, 2026
Unprompted review
Reply from Northline Labs
Thank you, Jennifer! Glad our team jumped on your email within the hour and got everything sorted — responsive support is a big deal to us. We appreciate you, and we'll see you on the next order!
So far great experience
So far great experience. Fast shipping and great results.
June 4, 2026
Unprompted review
Reply from Northline Labs
Thank you, Amanda! Fast shipping and a great experience so far — that's exactly what we want to hear. We appreciate you!
great product and quick delivery on…
great product and quick delivery on time and it’s top batch service seriously.
June 9, 2026
Unprompted review
Reply from Northline Labs
Thank you, Ahmed! Quick, on-time delivery and top-notch service — we appreciate the kind words and the support!
I’m pleased with the progress I’ve…
I’m pleased with the progress I’ve made. Easy to order and very fast delivery. Prices are decent.
June 9, 2026
Unprompted review
Reply from Northline Labs
Thank you! Easy ordering, very fast delivery, and fair prices — exactly what we aim for. We appreciate you!
Excellent products!
These peptides work better than I expected. Currently taking Reta and my appetite is non existent!
May 11, 2026
Unprompted review
Reply from Northline Labs
Thank you so much for the kind words and for choosing Northline — we're grateful for your support!
I've had good results with northline…
I've had good results with northline products and will continue to use them. Prices are reasonable and shipping is quick.
Judy W
June 9, 2026
Unprompted review
Reply from Northline Labs
Thank you, Judy! Reasonable prices and quick shipping are exactly what we aim for — and we appreciate you continuing to choose us!
So far so good
So far so good! Only a few orders so far but quality has been great. Shipping fast! Love the BOGO sales!!
June 9, 2026
Unprompted review
Reply from Northline Labs
Thank you! Great quality, fast shipping, and yeah — the BOGO deals are a nice bonus. Glad you're off to a great start with us. Appreciate you!
Fast Shipping - Amazing Product
Shipping was fast and everything was packaged perfectly! Website was easy to use. Already feeling a difference in my body from beginning my peptide journey. Def recommend Northline Labs!
June 3, 2026
Unprompted review
Reply from Northline Labs
Thank you! Fast shipping, perfect packaging, and an easy website — exactly the experience we want. Thanks so much for the recommendation!
Fast service … convenient… Will use…
Fast service … convenient… Will use them again
June 5, 2026
Unprompted review
Reply from Northline Labs
Thank you, Steve! Fast and convenient — exactly what we're going for. We'll be here when you're ready to order again!
SATISFACTION
My husband and I have been using Northline for several months. We are completely satisfied! We have actually gotten 2 family members and 2 gym partners on Peptides. My daughter is on Reta. She is down 32 lbs in 6 weeks!
Hubby and I on Ipa/tesa and Mots c. We have lost over 20 lbs each and increased our muscles. We are more than 100% satisfied with Northline products!
June 9, 2026
Unprompted review
Reply from Northline Labs
Thank you so much for the kind words and the support — it genuinely means a lot to our team. We're grateful to have you with us and we're here whenever you need anything!
Reply from Northline Labs
Thank you, Casey! Easy checkout, safe delivery, good product — that's the trifecta we go for. Appreciate you!
The Trustpilot Experience
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
Companies can ask for reviews via automatic invitations. Labeled Verified, they’re about genuine experiences.
Learn more about other kinds of reviews.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.