We’re currently tracking 4 active codes and deals for Fit Aminos — each one tested at checkout before it was listed. Everything on this page is verified and managed by Meroline, and it was last refreshed on July 31, 2026 at 1:13 pm.
Decision Snapshot
Fit Aminos
Editor score3.8/5
Fit Aminos stands out for rigorous product testing and transparency, but it suits US-based labs with higher order range.
Top-selling compoundBacteriostatic Water – Reconstitution Solution
Best offerSlash whopping $110 off on flagship blends
✓ 4 live offers✓ COA on file✓ Ships United States only✓ Researchers in the US looking for reliable, US-tested research peptides with the third-party batch COAs.Skip if Skip if you want international shipping, need lower shipping costs, or require a very large catalog.
Fit Aminos is the US based supplier of the research peptides. They are publishing batch-specific Certificates of Analysis on every products. You will find verified purity data and the test results for all the batches. It is best suitable for research related works. The information on this page covers the real catalog, and quality control for FitAminos. You also find the important practical details for buying and saving as a research purchaser.
4 coupons available (Active)
Team verified
Slash whopping $110 off on flagship blends
Purchase Klow80, GLOW70, CJC-1295+Ipamorelin and BPC157+TB500 blends at $159.99, $144.99, $99.99 and $120 respectively.
Affiliate disclosure: we may earn a commission when you buy through links on this page, at no extra cost to you. Commissions never influence our ratings — see how we verify.
How to use a code during checkout at Fit Aminos
Find and copy your code on this page before visiting to the Fit Aminos.
Secondly, add your research peptides and products to the shopping cart at fitaminos.com.
Next, paste your code into the promo field at checkout (Please check for the 'discount' line before payment).
Importantly, verify the updated savings in your cart total before confirming the payment.
If a code is invalid and don't work, then contact the support team with the details.
Best saving tips for Fit Aminos
Orders over $175 to qualify for the free shipping within the United States.
Bacteriostatic Water (Bac Water) is available at bulk pricing option. Purchase more than 3 bottles (3ml) and get 15% off. Or order over 5 bottles (3ml) and get 30% off.
There is loyalty program or automatic bulk price reductions option on the peptide orders.
Subscribe for an email newsletter to receive 10% off on your first order.
Products & pricing at Fit Aminos
Recorded from Fit Aminos’s own store listing on July 31, 2026. They list 36 products; the 28 below are the ones in our catalog, so prices stay comparable across vendors. Prices change often — treat these as a reference point and confirm at checkout.
36 of 36listings in stock
$69.99median price
$3.50typical price per mg
2 of 4cheapest of the 4 vendors we price
28/94of our tracked products
Fit Aminos carries about a third of the peptides listed in the reference catalog, including most standard research peptides and several proprietary stacks or blends such as KLOW Stack and GLOW70. Their prices per mg tend to run substantially lower than the market average, and a significant portion of the inventory is discounted at listing. Overall, their catalog reflects a balance of conventional single-ingredient peptides and some unique house formulations.
Categories in their store
Research PeptidesBPC-157Metabolic Research PeptidesGHK-CuDSIPEpithalonL-CarnitineGlutathioneKLOWGLOW
Listing only — we do not sell these and we are not the seller. Nothing here is a recommendation for human use; every compound is for laboratory research.
Fit Aminos shipping & payment options
Fit Aminos ships all the orders only within the United States using standard (3-5 business days), expedited (2-3 days), and overnight (1 day) methods. You need to pay $5 to $35 depending on your method. Most of the orders are processed in within 1 to 2 business days. The 2:00 PM PST is the cutoff time for the same-day processing. The free shipping is applying to any orders over $175. They do not ship internationally. Plus, they don't deliver to PO boxes, and APO/FPO/DPO addresses.
There are not accepted payment methods published within the FitAminos site. We suggest to please ask the team if you are unable to complete payment.
Testing & COA transparency at Fit Aminos
All the Fit Aminos research peptides are independently tested by the Freedom Diagnostics. Every batch receives it's HPLC-UV purity analysis, LC-MS for the identity confirmation. It also includes the USP <85> endotoxin screening. These results are posted on the Certificates of Analysis page which is directly accessible per compound and the batch.
According to the FitAmino's team the average purity is more than 99.6% within all the tested lots. You can review the specific results, dates, and verified partner lab details within their dedicated COA page. The batch number on your item will match the data on their public COA for the full traceability.
Vendor Trust Profile
Fit Aminos
Independent legitimacy and operational signals, scored on published criteria. Commissions never influence what appears here.
The Fit Aminos carries total 4 offers including 1, and 3 deals. The current maximum available saving option is 10%.
How many stacks are available at Fit Aminos?
There are 3 blends and stacks available at the official site. The highest price for their catalog is USD 159.99. It includes KLOW Stack, GLOW70, GLP-1S, GLP-2T, and GLP-3R.
How can I request documentation for a specific batch or compound?
COAs are published openly on the Fit Aminos website, sorted by compound and batch for direct download or viewing.
What is the return policy for Fit Aminos purchases?
Returns are accepted for unused, sealed products requested within 14 days of delivery. Opened or used compounds cannot be returned.
Top reasons to choose Fit Aminos
Batch-specific Certificates of Analysis (COAs) are posted publicly on their site for every peptide.
Third-party testing is performed by Freedom Diagnostics with HPLC-UV and LC-MS. It is to perform identity and purity.
Rigorous USP <85> endotoxin screening is accompanied for each batch. It is best suitable option for the safety-focused research use.
21+ · Research use only: all compounds referenced on this site are intended strictly for laboratory research and are not for human consumption. Nothing here is medical advice.
Best Fit Aminos code right now:Slash whopping $110 off on flagship blendsActivate deal
