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
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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 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 helpf... See more
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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
373 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 1 month
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Reply from Northline Labs
Straight to the point — we like it. Thanks, Chris! Great quality and fast shipping with no BS is exactly what we're going for. Appreciate you.
Took longer to get this last time but…
Took longer to get this last time but still pretty fast
May 25, 2026
Reply from Northline Labs
Thanks, eddie! Glad it still arrived pretty fast — we're always working to keep shipping times tight, and we appreciate you sticking with us.
Ordering was easy
Ordering was easy, site was informative in guiding my choices.
May 23, 2026
Unprompted review
Reply from Northline Labs
Thank you! We're glad ordering was easy and the site helped guide your choices — that's exactly the experience we're aiming for. We appreciate you.
Fast shipping and great service!
June 15, 2026
Unprompted review
Reply from Northline Labs
Thank you, Tony! Fast shipping and great service is exactly what we're all about. We appreciate you.
Fast
Fast! Quality! Reliable! There’s no reason to not order from Northline.
May 31, 2026
Unprompted review
Reply from Northline Labs
Fast, quality, reliable — that's the standard we hold ourselves to. Thank you, Ryan, we appreciate the strong words and your support.
Reply from Northline Labs
Thank you, Rick! Great service, shipping, and communication — that's the trifecta we aim for every time. We appreciate you.
Just giving you guys 5 star
June 1, 2026
Unprompted review
Reply from Northline Labs
Thank you for the 5 stars! We appreciate you taking the time, and we're glad to have you with us.
I bought Reta and GHKCU several times…
I bought Reta and GHKCU several times and have had zero issues and great results!
June 14, 2026
Unprompted review
Reply from Northline Labs
Thank you, Asti — we appreciate you coming back several times, and we're glad it's been a smooth, issue-free experience. Grateful to have you with us.
Lost 56 lbs in 3 months cheaper than…
Lost 56 lbs in 3 months cheaper than eating food
April 1, 2026
Unprompted review
Reply from Northline Labs
Thank you for the 5-star rating and your support — we genuinely appreciate you choosing Northline.
Easy to order
Easy to order. Great customer support when I had a question and order arrived quickly.
June 1, 2026
Unprompted review
Reply from Northline Labs
Thank you, Leni! Easy ordering, responsive support, and a quick arrival are exactly what we aim for. We appreciate you.
Fast shipping and solid product
Fast shipping and solid product! Prices are not high and love the deals they send out regularly.
May 15, 2026
Unprompted review
Reply from Northline Labs
Thank you, Les! Fast shipping, a solid product, and good deals — that's the combo we love delivering. Appreciate you keeping an eye on our offers!
Reply from Northline Labs
Thank you, Taelor! Fast shipping and a great product is exactly what we aim for. We appreciate you.
The Wolverine blend is amazing
The Wolverine blend is amazing. Would recommend to anyone with injuries, post surgery or with nagging muscle strains.
May 1, 2026
Unprompted review
Reply from Northline Labs
Thank you, Edward — really appreciate the kind words and the 5 stars. We're glad you're happy with the blend, and grateful to have you with us.
Everything was easy
Everything was easy, honest, and simple! Delivery was fast! Will be a regular customer!
June 4, 2026
Unprompted review
Reply from Northline Labs
Thank you, Molly! Easy, honest, and simple with fast delivery is exactly what we want every order to feel like. We're glad to have you as a regular!
I think the value of express delivery…
I think the value of express delivery could be better, and it could arrive faster.
June 12, 2026
Unprompted review
Reply from Northline Labs
Thanks for the honest feedback, Fabiana. We hear you on express delivery value and speed — it's something we're actively working to improve. We appreciate you taking the time.
Quick turnaround
I received my order in 3 business days and it was as advertised.
May 25, 2026
Unprompted review
Reply from Northline Labs
Thank you, Brent! Three business days and exactly as advertised is the experience we want every time. We appreciate you.
Reply from Northline Labs
Thank you, Paul! Easy ordering, great pricing, and quick delivery is what we're here for. We appreciate you.
Reply from Northline Labs
Thank you, Steve! Fast shipping, solid packaging, and quality all around is exactly what we strive for. We appreciate you!
Been using them for months
Been using them for months. Good product and fast shipping.
June 12, 2026
Unprompted review
Reply from Northline Labs
Thank you, Victoria — months of loyalty means a lot to us. A good product and fast shipping every time is the goal. We appreciate you!
Reply from Northline Labs
Thank you, Kandace! Good service and an even better product is the bar we hold ourselves to. We appreciate you.
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