Northline Labs are very prompt with shipping and once when I had a problem they were quick to correct the issue. My only slight complaint is that the vial packaging sometimes is not of a very high qu... Voir plus
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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... Voir plus
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I’ve ordered from Northline multiple times now and have had no problems whatsoever every time. Checkout process is super easy and delivery is quick. Products come well packaged and definitely are legi... Voir plus
L'entreprise a répondu
The products work as stated , price is very fair . The one detail to tighten up would be customer service , I tried multiple times to call to no answer never a call back . They definitely respond to e... Voir plus
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À propos de l'entreprise
Écrit par l'entreprise
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.
Coordonnées de contact
Etats-Unis
- northlinelabs.org
4,7
Excellent
237 avis
Demande des avis aux clients
Cette entreprise invite régulièrement ses clients à laisser des avis, qu’ils soient positifs ou négatifs.
A répondu à 75 % de ses avis négatifs
Répond généralement dans un délai d'un mois
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Shipping took longer than I would like…
Shipping took longer than I would like but product quality was good.
20 avril 2026
Avis spontané
Réponse de Northline Labs
Thanks Whitney — honest call on shipping speed. Once a package leaves us with UPS it's out of our hands, but glad the product itself read clean. — Northline Labs Support Team
I can't get anyone to email me back
I can't get anyone to email me back. I HAVE QUESTIONS ABOUT THE GLP 3.
1 mai 2026
Avis spontané
Réponse de Northline Labs
Liz — sorry we missed you. Please email hello@northlinelabs.org with your order number and your Reta GLP-3 questions and we'll get back to you within hours (we read every reply). If you've already emailed, check your spam folder for our response. — Northline Labs Support Team
Réponse de Northline Labs
Thanks Connie — means a lot. Every batch is third-party tested at 99%+ purity and the COA goes up on the product page before we ship. Glad it's reading right for you. — Northline Labs Support Team
I couldn’t recommend Northline labs’s more…
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-depth educational content, shipping is exceptionally fast snd everything is packed safely.
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Trish — that's the whole stack we work on (lot quality, COAs, education, shipping) so it's really good to hear all four came through on your end. Appreciate the detailed review. — Northline Labs Support Team
So much better than I’d hoped
I was nervous about the whole process. But it was so easy and the product came immediately! My expectations were guarded at best, but I’ve ended up showing two of my coworkers this supplier after my results sparked intense interest!
15 mars 2026
Avis spontané
Réponse de Northline Labs
Thanks Kim — appreciate you taking a chance on us. Glad the ordering process and shipment held up. Word of mouth from actual customers means more than any marketing we could run. — Northline Labs Support Team
My order was shipped fast and overall…
My order was shipped fast and overall very pleasant experience. Placing my next order already, highly recommend!
1 avril 2026
Avis spontané
Réponse de Northline Labs
Thanks Elaine — appreciate it. Glad the shipment was fast and the experience held end-to-end. Looking forward to seeing you on the next order. — Northline Labs Support Team
I started with Northline Labs a few…
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 before. Due to this great experience I have made several more purchases from them and will continue to use them as my peptide supplier.
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Keith — expansion from one peptide to several months of repeat orders is the best signal we can get. Glad CS, speed, and lot quality have held up. — Northline Labs Support Team
Quick & Reliable
Quick , and it works! Very pleased with Northline and will keep ordering.
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Lauren — quick and reliable are the two things we try hardest to keep boring and consistent. Appreciate the repeat business. — Northline Labs Support Team
My experience so far is really good I’m…
My experience so far is really good I’m pleased with peptides that I ordered for my husband and I definitely plan on ordering more peptides soon , I searched many sites and always ended up coming back to my trusted site Northlinelabs they’re site is definitely more trustworthy also when you place your order be sure to purchase bact water to help you reconstitute the peptides that you order
4 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Amber — the BAC water tip is exactly right; reconstitution is where most first-time questions land, so having BAC in the same order saves a step. Appreciate you sticking with us. — Northline Labs Support Team
Honest Review
I started with GLP 3 which is amazing. Added Mots-C around week 3, which is a game changer. Ordering is easy and delivery was pretty quick.
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Kristin — appreciate the honest review. Easy ordering and quick delivery are the two pieces we have direct control over, so we work to keep both consistent. — Northline Labs Support Team
Réponse de Northline Labs
Thanks Evan — short and to the point. Appreciate the trust. — Northline Labs Support Team
Réponse de Northline Labs
Thanks Kandace — lot quality and fast turnaround are the bar. Glad they held. — Northline Labs Support Team
Great product
Easy order, fast shipping! I've ordered several times for myself and multiple family members, we are happy with the product, shipping, availability and prices.
23 avril 2026
Avis spontané
Réponse de Northline Labs
Thanks Jaiden — easy ordering, fast shipping, broad availability, fair pricing. That's the playbook. Appreciate the repeat business. — Northline Labs Support Team
It was quick and easy
It was quick and easy. Delivery of product was fast also.
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Robert — quick, easy, and fast delivery. That's all we're aiming for. Appreciate the review. — Northline Labs Support Team
Ordering is easy
Ordering is easy, had trouble with my first shipment, emailed them with my concerns. They had it resolved in a day. Would suggest to anyone.
4 avril 2026
Avis spontané
Réponse de Northline Labs
Thanks Scott — that recovery story matters more to us than a perfect shipment, since stuff occasionally goes sideways. Glad we got it sorted in a day. — Northline Labs Support Team
Northline Labs has great customer…
Northline Labs has great customer service and great pricing. Definitely going to order again!!
1 avril 2026
Avis spontané
Réponse de Northline Labs
Thanks Jeanie — fair pricing and responsive CS are non-negotiable for us. Looking forward to the next order. — Northline Labs Support Team
Efficient Service
The service is great! I received the product 48 hours after ordering. I am new to peptides and wasn’t sure what to expect. I was impressed that they were so efficient.
1 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Christie — first-time customers are the ones we pay closest attention to. 48-hour delivery and a clean experience matter most when you're new to this space. Welcome aboard. — Northline Labs Support Team
Product is great
Product is great - customer service is a little slow to get back to you - but nothing to do with the product.
I'd recommend !
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Shell — honest call-out on response speed. We've added CSR staffing recently and your feedback pushes that work. Glad the product itself held up. — Northline Labs Support Team
wide variety of peptide options
wide variety of peptide options. Competitive options. Only been using for a couple weeks, but Seem to be working great!
11 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Greg — catalog breadth + competitive pricing are two we put real weight on. Welcome aboard. — Northline Labs Support Team
Retatutride simply the BEST
After having tasted their peptides particularly Retatutride, our research trials were very successful atestiguan high quality and purity , our team of colleagues have started to purchase batches of 10 vials we are very satisfied with Northline labs
5 mai 2026
Avis spontané
Réponse de Northline Labs
Thanks Ernesto — research teams ordering in batch volume is the highest signal we get. Glad lot quality and purity have held across multiple batches. — Northline Labs Support Team
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