Great customer service
Great customer service. Prompt shipping and a good product at a reasonable price. I will continue to buy there products in the near future.
George Vaughn
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Cosmic Peptides
5.020 reviews
Last reviewed: Feb 26, 2026Do you agree with Cosmic Peptides's TrustScore? Voice your opinion today and hear what 21 customers have already said.
cosmicpeptides.comMember since Mar 2026
Cosmic Peptides is an online company. Based on 20 reviews on TrustPlane, it has an average rating of 5.0 out of 5 stars. Last reviewed February 26, 2026.
Customer Reviews
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20 reviews
All Five Stars
Cosmic Peptides keeps it simple and straighforward, with affordable pricing and secure shipping. I very much appreciate their personable, yet professional approach. I am comfortable with their products and business model. I have tried many suppliers, some are pretty good; the best overall experience is here, though. Keep up the good work....I'll be back.
John B.
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Ordered once so far (Will again in the…
Ordered once so far (Will again in the future just don't need more yet). Really appreciated the communication w/shipping, packaged well too. Was very happy to see it shipped same day as promised! :D. Thanks again
Ken Erwin
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Extremely fast shipping and excellent…
Extremely fast shipping and excellent product. Cosmic Peptides has integrity as they refunded shipping charges when I made two sequential orders as they were able to ship together. Most businesses would not have refunded shipping and ship together to save me money.Thank you!
Charles Vance
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Great company to deal with
The pricing is great! The delivery time is fantastic! The only thing I did not like is there is no directions on reconstitution. I understand this is not being sold for human use. But even for research you need directions for reconstitution! I have re-ordered. And will continue to order from this company.
Sally O
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Continued Consistency
I have ordered six times in the last 4 months. I have always had excellent communication and product consistency, which is key to my research.
Drea H.
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Returning customer
This company has a really fast turn around time! I was super impressed by how fast I got my order! Great customer service as well. I had an issue and they were able to help me out immediately. I will definitely be coming back.
Spencer Logan
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Great company
The team at Cosmic Peptides responds incredibly quickly and clearly cares about the product they sell. Five stars!
Jason Stone
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Received a crushed product
My PT-141 vial has been completely crushed from delivery, And offered full credit or replacement. Very happy and will order again
Chris McCracken
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Quick shipping
I ordered the semax and NAD plus After my second dose of the NAD plus my energy levels have gone up and I've been using the semax every day since receiving. The last couple days after waking up I felt rested and more alert and my thinking is a little bit more clearer
steven. f
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Quick response time.
Just wanted to compliment Cosmic Peptides for quick delivery and reasonable prices!
MARK ALLEN
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Awesome team that I can tell cares…
Awesome team that I can tell cares about their customers I’ve only ordered once , I ordered a second time and UPS lost my package but these guys shipped what I purchased and a extra on the house for free. I love cosmic peptides
Daniel Igunma
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They went out of their way ...
They went out of their way to make sure my concerns were addressed and covered, I reached out via email before my order with questions and received replies that same day - they were extremely knowledgable and took the time to write detailed, straightforward responses that didn't make me feel like "just another customer." This was followed up by fast shipping on my order and a nice handwritten postcard in the order thanking me for being a customer. Great experience!
Shelley C
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Fast delivery and quality products DSIP…
Fast delivery and quality products DSIP Peptide is FANTASTIC
kevin Dixon
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Made me feel like a special customer
From the moment I landed on their site, I could tell that this was a company worth my time. All the information about their products is clearly laid out in simple terms, right on the product page. What really caught my attention was the pricing, which seems very fair. The customer service was top-notch, my package arrived earlier than I expected, everything wrapped and labeled neatly with a personalized notecard thanking me for my business. Their customer service team was quick to respond when I contacted them with a question. Overall, a great experience with Cosmic!
Melissa M.
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Best Peptide company
Cosmic Peptides has been the most reliable and professional peptide company I’ve worked with, and they earned this review. The entire experience—from ordering to delivery—was seamless. The products arrived perfectly sealed, crystal clear, and exactly as described, which immediately showed their commitment to quality. Packaging was secure, temperature-stable, and clearly labeled, giving it the feel of a true research-grade lab shipment rather than a generic retailer. Their customer service responded quickly with knowledgeable, detailed answers, and shipping was fast with accurate tracking the entire way. After trying multiple suppliers over the years, Cosmic Peptides stands out for its consistency, transparency, and high standards. This is the only peptide company I fully trust, and the one I’ll continue using going forward.
customer
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quick service and great products
great products, great prices, excellent results. easy shopping experience.a real person reached out to let me know they were upgrading my shipping to 2-day for free to avoid delays.
jayde
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Excellent experience with this company
Excellent experience with this company. Easy to order, great packaging, personal touches. Definitely a go-to for my needs. Would buy again and recommend.
Norma U
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Great customer experience!
Super fast response time to questions. Items shipped out with a tracking notification within 2 hours of placing my order. Items arrived safe and secure in discreet packaging. The product quality is excellent. Would definitely buy again.
Shelly Glover
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Easy, fast, and dependable. Fair pricing
They have a very nice, easy to use website experience with a large catalog, and the ordering experience was very smooth and simple. Shipping went out the same day and arrived on-time. The packaging was safe and discreet. Overall, a really great experience.
Sonia V
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According to TrustPlane, Cosmic Peptides has a 5.0/5 rating based on 20 verified reviews as of March 2026. Source: trustplane.app/company/cosmicpeptides-com