I did not receive any instructions. My friend who told me about fit amino. Told me what to do. Ensuring information. However, I received it within 5days of ordering.
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See what reviewers are saying
It’s been weeks and I haven’t received any indicator that it’s coming. I’ve written and asked for an update but nothing
Company replied
I like this company I spoke to the owner super cool and chill very responsive as well both phone and email I really liked that I oder like 12 different products I've tried 4 so far and I like it yet... See more
Company replied
Casey provides excellent, attentive service each and every time. He’s really an asset to the company. Good quality, trusted, effective products shipped out quickly.
Company replied
Company details
Written by the company
Fit Aminos is a research peptide supplier focused on providing high-quality, lab-tested compounds at fair and accessible prices. Our mission is to make reliable research peptides available without the inflated costs often seen in the industry, while maintaining strict standards for quality, transparency, and consistency. We offer a wide selection of research peptides including GLP-1 analogs, recovery peptides, growth hormone signaling peptides, and metabolic research compounds. Each product is carefully sourced and handled with an emphasis on purity and consistency to support research applications. All products sold by Fit Aminos are intended for research use only. At Fit Aminos, transparency is a core part of our approach. We strive to provide clear product information and maintain strong quality control practices to ensure our customers receive dependable compounds for their research needs. Our team works to ensure every order is processed quickly, packaged securely, and delivered reliably. Customer experience is also a top priority. We focus on responsive communication, dependable fulfillment, and straightforward ordering so researchers and customers can feel confident when purchasing from us. Fit Aminos proudly serves customers across the United States. Our goal is to build long-term trust by delivering consistent quality, fair pricing, and a reliable purchasing experience every time.
Contact info
9221 E Baseline Rd Ste 109-174, 85209, Mesa, United States
- Support@FitAminos.com
- fitaminos.com
4.0
Great
44 reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 85% of negative reviews
Typically takes over 1 month to reply
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Easy ordering process and great…
Easy ordering process and great communications throughout.
23 August 2026
Instructions with shipping at least
ordered two Reta with a free bac water included. One 10mg and another 15mg. I used the 10mg and it was working great. There are no instructions so I contacted the Customer service rep and he told me how much bac water to use and what doses I need to get started as well as when I need to dose up.
Started on 10mg and it worked great. Started losing weight and all was well. I went through my 10mg vial and was going to dose up when I started my 15mg. I did so. Mixed the bac water in and got started on the 15mg at a 30 unit dose. I expected some sort of side effects since I got those with the first but got nothing. I thought that was strange. Oh well.
After a couple of days I noticed my hunger is back and I’m not losing at all. I’m gaining. I looked up if bac water needed to be refrigerated and it absolutely does. I reconstituted my 15mg with bac water I’ve had in a dark cabinet for a month now. This has made my 15mg vial ineffective. When I talked to the rep he didn’t tell me anything about keeping that refrigerated nor does it say to do so on my vial.
I read some reviews of people saying some of vials were ineffective so maybe that’s the case, either way I’m going to do another dose and if this week goes the same, I’ll just look for a different supplier and trash the 15mg vial. I’m so disappointed.
**Update** a doctor friend of mine is actually saying that I can’t use the 15mg vial because the bac water was compromised so I’ll have to throw it out. Smh. I did tell the guy on the phone I’d never done any of that. Just wish some clear instructions were somewhere. So disappointed.
23 August 2026
Unprompted review
It’s been weeks and I haven’t received…
It’s been weeks and I haven’t received any indicator that it’s coming. I’ve written and asked for an update but nothing
9 August 2026
Reply from Fit Aminos
Hi there, we're so sorry to hear about the trouble with your order — this isn't the experience we want for our customers. We'd love the chance to look into it and make things right for you. Please reach out to us at support@fitaminos.com and our team will take care of you. — The FitAminos Team
NOT GOOD!!!
If I could give this no stars I would! I ordered peptides and they did not work. Very disappointed. Don’t recommend.
1 March 2026
Unprompted review
Reply from Fit Aminos
Hi Emma, we're truly sorry to hear you're not happy with your experience — that's not what we want for our customers. We'd really appreciate the chance to learn more and make it right. Please contact us at support@fitaminos.com and our team will be glad to help. — The FitAminos Team
I did not receive any instructions
I did not receive any instructions. My friend who told me about fit amino. Told me what to do. Ensuring information. However, I received it within 5days of ordering.
31 July 2026
Reply from Fit Aminos
Thank you for your feedback! We’re glad your order arrived quickly. Please note that our products are sold for research purposes, so we do not provide dosing protocols
Reply from Fit Aminos
Thank you, Alejandra! We're so glad you've had a great experience with us. Making things easy and reliable for our customers is what we aim for every day, and it means a lot that you took the time to share this. We look forward to serving you again soon.
The FitAminos Team
I had forgotten to put my order number…
I had forgotten to put my order number on my Zelle transfer and so I contacted the company via text. I promptly received a response.
4 July 2026
Reply from Fit Aminos
Thank you, Wendy. We know how stressful it can feel when an order detail goes missing, so we're glad our team could sort out the order number quickly over text. We appreciate you taking the time to share your experience and look forward to your next order.
The FitAminos Team
Reply from Fit Aminos
Thank you, Michael! Easy ordering and fast turnaround are exactly what we aim for, and we're glad the support team came through for you. We appreciate the kind words and look forward to serving you again.
The FitAminos Team
I like this company I spoke to the…
I like this company I spoke to the owner super cool and chill very responsive as well both phone and email I really liked that I oder like 12 different products I've tried 4 so far and I like it yet to try the other 8 this company is legit I was worried I wouldn't receive anything but this company is good 👍 I ordered from Florida everything went well and pretty fast too will be ordering more from fit aminos. I tried costal compound hey took days just to fulfill my oder was aggravated but FIT Aminos was fast EMAILS WAS FAST RESPONSE WAS QUICK the first oder was not received by fit aminos when I called they changed it quickly and fixed the issue fast I was happy! It's legit company will be coming back for more!! Yessah! 💪
3 July 2026
Reply from Fit Aminos
Thank you, Juan! We really appreciate you giving us a shot and taking the time to write such a detailed review. We're glad the team could fix the issue with your first order quickly and that everything arrived fast. Enjoy the rest of your lineup, and we'll be here whenever you're ready to reorder.
The FitAminos Team
Love buying from FitAminos
Love buying from FitAminos. Fastest shipping of any company I've used and quality is excellent.
2 July 2026
Reply from Fit Aminos
Thank you for the kind words, Matthew, and for being a repeat customer. Fast, reliable dispatch is something we work hard at, so it is good to know the shipping has stood out for you. We appreciate you choosing us.
Casey
Fit aminos has quality products at a…
Fit aminos has quality products at a great price with fast shipping
27 June 2026
Reply from Fit Aminos
Thanks so much, Robyn. Fair pricing and quick dispatch are two of the things we most want to get right, so it means a lot to see them called out. We appreciate your business and look forward to your next order.
The FitAminos Team
Reply from Fit Aminos
Thank you for taking the time to leave a review, Kevin. We are glad the order reached you quickly. Thanks for your support, and please reach out to support@fitaminos.com any time you need us.
Casey
Worth every penny
Casey provides excellent, attentive service each and every time. He’s really an asset to the company. Good quality, trusted, effective products shipped out quickly.
27 June 2026
Reply from Fit Aminos
Thank you, Kalani. Attentive, responsive service is exactly the standard we hold ourselves to, so hearing that it has been consistent across your orders is the best feedback we could ask for. We appreciate your continued support.
Casey
Reply from Fit Aminos
Thanks for the review, Ladale. Competitive pricing and quick dispatch are a big focus for us, and we are glad they have made a difference. We appreciate your business.
Casey
The first bottle of retatrutide I got…
The first bottle of retatrutide I got worked great. However I bought another bottle at a higher dosage and feel no effects at all. I’ve even doubled the dosage and still no effects. I reached out but never heard a response. Disappointed but will have to find a new source due. Even had my friends buy from here.
15 June 2026
Unprompted review
Reply from Fit Aminos
Thank you for the honest feedback, Sahaley, and we're sorry we let you down, especially that your message to us went unanswered. That is not the standard we hold ourselves to, and we apologize. We would like the chance to look into your order and make this right: please contact support@fitaminos.com so we can resolve the issue as quickly as possible.
The FitAminos Team
Love Fit Aminos
Love Fitaminos! It not only helps with appetite but inflammation. Not to mention the shipping is on point!! Thank you!
8 June 2026
Reply from Fit Aminos
Thank you for the review and for your support, Shannon. We are glad the shipping has been consistently quick for you. If there is ever anything you need from us, support@fitaminos.com is the fastest way to reach the team.
Casey
Very slow shipping and unhelpful…
Very slow shipping and unhelpful customer service. Do not recommend.
13 May 2026
Unprompted review
Reply from Fit Aminos
We're sorry, Amy. Slow shipping is frustrating enough on its own, and our customer service should have made things easier, not harder. We apologize and take full ownership of the experience you described. We would like the opportunity to make this right. Please contact support@fitaminos.com so we can resolve the issue as quickly as possible.
The FitAminos Team
My stuff was supposed to be here…
My stuff was supposed to be here Thursday and still has not arrived e and it’s Saturday.
9 May 2026
Reply from Fit Aminos
We're sorry, Bard. Waiting past the expected delivery date is frustrating, and we apologize for the delay. We want to make this right and get your order where it needs to be: please contact support@fitaminos.com so we can resolve the issue as quickly as possible.
The FitAminos Team
Absolutely phenomenal customer service…
Absolutely phenomenal customer service and unmatched product quality. Easily the highest quality! I am officially a customer for life!
13 May 2026
Unprompted review
Reply from Fit Aminos
Thank you, Ryan. Responsive support and consistent, verifiable quality are what we work toward every day, and it means a great deal to hear both reflected in your experience. We are grateful to have you as a customer.
Casey
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