Retatrutide vs Cagrilintide vs Semaglutide: American Peptides Research Product Comparison 2026 - Promo Code LOOT10 for Upto 30% OFF
LOOT10 promo code provide up to 30% off. American Peptides currently offers several products in its GLP-1 & Metabolic research category, including Retatrutide, Cagrilintide, Retatrutide + Cagrilintide, Semaglutide and Tirzepatide. This guide compares four featured products from that category by price, research positioning, documentation and supplier value, then explains how the American Peptides LOOT10 promo code can provide up to 30% off.
Shop American Peptides and apply LOOT10
American Peptides has a considerably broader catalog than the four products discussed in detail here. Its current store lists research peptides, blends, bioregulators, nasal products, dissolving strips, research bundles and laboratory supplies in addition to its GLP-1 and metabolic products.
This comparison is focused on research sourcing, product specifications, documentation, pricing and supplier comparison.
Research-use note: American Peptides identifies these products as laboratory and research materials. This guide does not provide dosing, treatment instructions or recommendations for human or veterinary use.
Retatrutide vs Cagrilintide vs Semaglutide: The Quick Comparison
These products should not be treated as interchangeable versions of the same research material.
Retatrutide is a multi-receptor research peptide involving GIP, GLP-1 and glucagon signaling.
Cagrilintide is an amylin analogue.
Semaglutide is a GLP-1 receptor agonist analogue.
Retatrutide + Cagrilintide is a co-formulated research product combining Retatrutide and Cagrilintide at a specified ratio.
For a laboratory buyer, the more useful question is not simply "which is best?"
It is:
Which research material matches the project, which supplier provides adequate documentation, and which option provides the best final value?
American Peptides Price Snapshot
The following prices come from the product screenshot supplied for this article.
| Product | Displayed price | Full 30% discount scenario | Quantity shown |
|---|---|---|---|
| Retatrutide (Reta) | $105 | $73.50 | 10mg |
| Cagrilintide | $170 | $119 | 10mg |
| Retatrutide + Cagrilintide | $200 | $140 | 12.5mg / 2.5mg |
| Semaglutide | $60 | $42 | 20mg |
The 30% column is a mathematical scenario using the supplied LOOT10 offer. The promotional offer states up to 30% off, so the actual checkout is the final authority.
One additional point matters here: American Peptides' live pages can differ from an earlier screenshot as inventory and pricing change. For example, its current Semaglutide page shows a starting price of $90 for 10mg, while the supplied screenshot showed the 20mg variant at $60.
That is exactly why a good price-comparison page should distinguish between a dated price snapshot and the current live checkout.
1. American Peptides Retatrutide: Strong Single-Compound Value
The supplied catalog screenshot shows:
Retatrutide 10mg — $105
At a full 30% discount:
$105 → $73.50
That means:
$10.50 per mg before discount
$7.35 per mg in the full-discount scenario
The current American Peptides Retatrutide product page lists several sizes, including 10mg, 20mg, 30mg, 48mg and 60mg. It states that the product is third-party tested, offers ≥99% purity verification through HPLC and mass spectrometry, and provides a lot-matched Certificate of Analysis for each vial.
That is a meaningful advantage for research purchasing because the buyer can evaluate more than just the storefront photograph and headline purity number.
The page also states that the product is shipped from a U.S. facility and that orders over $300 qualify for free shipping under the site's current shipping policy.
Why Retatrutide stands out
Retatrutide is structurally different from a conventional GLP-1-only research target because it is designed to interact with GIP, GLP-1 and glucagon receptors. American Peptides describes it as a 39-residue synthetic research peptide and provides chemical and analytical information alongside its COAs.
For buyers specifically researching Retatrutide, the combination of:
competitive displayed pricing + multiple size options + accessible COAs
is one of the stronger parts of the American Peptides proposition.
2. American Peptides Cagrilintide: A Different Research Target
The supplied screenshot shows:
Cagrilintide 10mg — $170
At a full 30% discount:
$170 → $119
That's equivalent to:
$17 per mg before discount
$11.90 per mg in the full-discount scenario
Cagrilintide belongs to a different research class from Retatrutide. FDA's substance records identify Cagrilintide as an amylin analogue. FDA also states that Cagrilintide is not a component of an FDA-approved drug.
That makes the product useful to discuss separately rather than treating it as just another GLP-1 research peptide.
The honest price comparison
Cagrilintide is also where the competitor comparison becomes particularly important.
A current Peptide Sciences listing checked for this guide shows Cagrilintide 10mg at $145, which is below the $170 price shown in the supplied American Peptides screenshot.
So American Peptides should not be presented as automatically being the cheapest supplier for every product.
The stronger argument is:
American Peptides is highly competitive across the featured selection, and LOOT10 can make its final checkout price substantially more attractive.
3. American Peptides Retatrutide + Cagrilintide: The Distinctive Combination
The supplied screenshot shows:
Retatrutide + Cagrilintide — $200
At the full 30% discount scenario:
$200 → $140
The live product page identifies the formulation as:
12.5mg Retatrutide + 2.5mg Cagrilintide
It is described as a co-formulated research blend and comes with lot-matched COA documentation. American Peptides states that the material is ≥99% purity verified by HPLC and mass spectrometry.
This product deserves a different comparison framework.
It is not simply:
"Retatrutide plus Cagrilintide equals two separate vials."
The formulation has its own ratio, quantity, price and lot documentation.
A better comparison looks at:
Total amount of each material
Formulation
Ratio
COA
Testing
Research objective
Final checkout price
That makes the Reta+Cag product one of the more interesting options in the current American Peptides metabolic category.
4. American Peptides Semaglutide: The Lowest Displayed Price in the Screenshot
The supplied screenshot shows:
Semaglutide 20mg — $60
At a full 30% discount:
$60 → $42
That's:
$3 per mg before discount
$2.10 per mg in the full-discount scenario
The current American Peptides Semaglutide page lists 10mg and 20mg variants and states that its batches are independently third-party tested with ≥99% HPLC and mass-spectrometry verification and lot-matched COAs.
Semaglutide is also an important comparator because the molecule has a different regulatory history.
FDA-approved products contain semaglutide, including Wegovy. In March 2026, the FDA approved a higher-dose 7.2mg Wegovy HD formulation.
That does not mean a research-use Semaglutide listing should be treated as equivalent to an FDA-approved prescription product. The research product and the approved finished medicine are different categories and should be described that way.
Retatrutide vs Cagrilintide vs Semaglutide: Which Has the Best Value?
There isn't a single winner on every criterion.
That's actually what makes the comparison useful.
Lowest displayed entry price
Semaglutide wins this category based on the supplied screenshot at $60 for 20mg.
Strongest displayed Retatrutide pricing
Retatrutide is particularly competitive at $105 for 10mg in the supplied screenshot. The current American Peptides product page also offers multiple size options.
Most distinctive formulation
Retatrutide + Cagrilintide stands out because it is a dedicated co-formulated research product rather than two independent products.
Most important direct competitor price check
Cagrilintide deserves the closest competitor comparison because the checked Peptide Sciences listing is currently priced below the supplied American Peptides screenshot price.
Best overall supplier proposition
This is where American Peptides gets the edge:
competitive pricing on selected products + lot-matched documentation + broad catalog + LOOT10 across the catalog.
Price Comparison With Other Research Suppliers
A useful supplier comparison should normalize quantity and avoid comparing unrelated formats.
| Product | American Peptides | Competitor snapshot | Takeaway |
|---|---|---|---|
| Retatrutide | $105 / 10mg | Core: $150 / 10mg; Peptide Sciences: $190 / 12mg | American Peptides lower in these checks |
| Cagrilintide | $170 / 10mg | Peptide Sciences: $145 / 10mg | Competitor lower |
| Semaglutide | $60 / 20mg in supplied screenshot | Peptide Sciences: $225 / 10mg | American Peptides lower in this snapshot |
| Reta + Cag | $200 / 12.5mg + 2.5mg | No exact like-for-like comparator used | Compare formulation and total material |
Core Peptides currently lists Retatrutide 10mg at $150, while Peptide Sciences currently lists Retatrutide 12mg at $190 and Semaglutide 10mg at $225.
These prices can change, so treat them as research snapshots rather than permanent price guarantees.
Where American Peptides Has the Strongest Case
Competitive Retatrutide pricing
The supplied $105 price for 10mg is below the checked Core Peptides and Peptide Sciences price-per-mg comparisons.
Strong displayed Semaglutide value
The supplied screenshot's $60 price for 20mg is particularly aggressive on a simple price-per-mg basis.
A dedicated Reta+Cag research option
The combined product gives buyers another formulation to evaluate rather than restricting the category to individual products.
Accessible documentation
American Peptides maintains a dedicated COA library and says that every batch is independently third-party tested for identity and purity. The library currently lists documentation for Retatrutide, Reta+Cag, Semaglutide, Tirzepatide and many other products.
Broader catalog
The four products in this comparison are only part of the overall store.
The current American Peptides product catalog includes dozens of other research products, bundles and laboratory supplies.
Why the COA Matters More Than the Coupon
A 30% coupon looks great on a product page.
But for research purchasing, the documentation should come first.
American Peptides currently says every batch is independently third-party tested for identity and purity and provides lot-matched Certificates of Analysis.
When reviewing a COA, check:
Product name
Lot or batch number
Purity result
Testing method
Identity information
Match between the COA and the actual lot being purchased
For Retatrutide, the American Peptides product page provides multiple lot-specific COAs. The COA library also contains separate entries for the Reta+Cag product and Semaglutide.
View the American Peptides COA library
That transparency is one of the better reasons to consider American Peptides even before the discount is taken into account.
How LOOT10 Changes the Economics
The promotional offer supplied for this guide states:
LOOT10 = up to 30% off across the American Peptides catalog
Using the prices shown in your supplied screenshot:
| Featured product | Screenshot price | 30% discount scenario | Potential saving |
|---|---|---|---|
| Retatrutide 10mg | $105 | $73.50 | $31.50 |
| Cagrilintide 10mg | $170 | $119 | $51 |
| Reta + Cag | $200 | $140 | $60 |
| Semaglutide 20mg | $60 | $42 | $18 |
If all four screenshot-priced products were purchased together:
Original subtotal: $535
At a full 30% discount:
$374.50
Potential saving:
$160.50
These are straightforward calculations based on the supplied prices. The live checkout should be treated as the definitive figure because prices, availability and promotional terms can change.
How to Use the American Peptides LOOT10 Promo Code
Using the discount code is simple:
Open the American Peptides offer page.
Select the research product and quantity.
Add it to your cart.
Continue to checkout.
Enter LOOT10 in the discount field.
Apply the code.
Confirm the actual amount saved.
Review shipping and your final total.
Use LOOT10 at American Peptides
One practical rule is worth remembering:
Don't assume "up to 30%" means exactly 30% on every order. Check your actual cart.
American Peptides vs Peptide Sciences vs Core Peptides
American Peptides
The strongest overall case is:
broad selection + competitive pricing + lot-specific COA access + LOOT10.
It is particularly attractive when a buyer is comparing more than one research product.
Peptide Sciences
Peptide Sciences currently exposes product-level analytical documentation alongside its Retatrutide and Semaglutide listings. Its current Retatrutide 12mg listing is $190 and its Semaglutide 10mg listing is $225.
Its Cagrilintide 10mg listing is currently $145, which beats the $170 American Peptides screenshot price.
Core Peptides
Core Peptides currently lists Retatrutide in 5mg, 10mg and 20mg formats, including a $150 10mg listing, and says batches are independently verified with lot identification for COA matching.
Overall verdict
American Peptides has the stronger overall value proposition for this comparison, but not because it wins every SKU.
It wins because several of its displayed prices are highly competitive, the supplier provides accessible batch documentation, the catalog is broad, and the supplied LOOT10 offer can reduce the final cart.
American Peptides Has More Than These Featured Products
These four products are featured examples, not the complete American Peptides catalog.
The current catalog also contains products including:
BPC-157
GHK-Cu
MOTS-C
CJC-1295 + Ipamorelin
Semax
Ipamorelin
TB-500
Tesamorelin
AOD-9604
NAD+
Selank
Thymosin Alpha-1
Research bundles
Laboratory supplies
The company's current catalog lists 46 research-grade peptides alongside a broader store inventory.
That wider catalog makes a catalog-wide promotion like LOOT10 more useful than a coupon tied to a single compound.
Regulatory and Research Context
American Peptides labels these products for laboratory and research use only.
Retatrutide and Cagrilintide deserve particularly careful wording. The FDA states that neither is a component of an FDA-approved drug and that retatrutide and cagrilintide cannot be used in compounding under federal law.
Retatrutide remains investigational. Its ongoing clinical development is separate from the research-use products discussed in this article.
Semaglutide has a different regulatory position because it is present in FDA-approved medicines. That still does not make an online research product equivalent to an approved prescription product.
For this reason, the useful comparison here remains supplier, research material, documentation and price.
American Peptides Promo Code LOOT10 FAQ
What is the American Peptides promo code for August 2026?
The promotional code supplied for this guide is LOOT10, advertised as providing up to 30% off across the American Peptides catalog.
Does LOOT10 work on American Peptides Retatrutide?
According to the supplied offer, LOOT10 applies across the catalog, including Retatrutide. Enter the code at checkout and verify the actual discount.
Does LOOT10 work on American Peptides Cagrilintide?
The supplied offer states that LOOT10 is valid across all products, including Cagrilintide.
Does LOOT10 work on Semaglutide?
According to the supplied offer, yes. The final checkout should be used to confirm the applied discount.
Does LOOT10 work on Retatrutide + Cagrilintide?
The supplied offer states that the code applies across the catalog, including the combined Reta+Cag product.
Which featured American Peptides product has the lowest displayed price?
In the supplied screenshot, Semaglutide 20mg is listed at $60, which is the lowest displayed price among the four featured products.
Is American Peptides cheaper than Peptide Sciences for Retatrutide?
In the price snapshot used here, yes. American Peptides shows $105 for 10mg, while Peptide Sciences lists $190 for 12mg. That gives American Peptides the lower displayed price and lower price per mg in this comparison.
Is American Peptides cheaper than every competitor for every product?
No. The checked Peptide Sciences Cagrilintide listing is currently $145 for 10mg, below the $170 price shown in the supplied American Peptides screenshot.
Does American Peptides provide lot-matched COAs?
Yes. American Peptides says its batches are independently third-party tested and provides lot-matched COAs through its COA library.
Where do I enter the American Peptides LOOT10 code?
Enter LOOT10 in the discount-code field during checkout and confirm that the saving appears in the order summary.
Final Verdict: American Peptides Has the Stronger Overall Value Story
When comparing Retatrutide, Cagrilintide, Retatrutide + Cagrilintide and Semaglutide, there isn't one simple "winner" in every category.
Instead, the products have different research profiles and different pricing.
Retatrutide is particularly competitive at the displayed American Peptides price.
Semaglutide has the lowest displayed entry price among the featured products in the supplied screenshot.
Retatrutide + Cagrilintide offers the most distinctive combined formulation.
Cagrilintide is the strongest example of why a credible comparison should acknowledge competitor pricing rather than claim American Peptides is cheapest everywhere.
What gives American Peptides the overall edge is the combination of:
competitive pricing + accessible lot-matched COAs + broad product selection + LOOT10 for up to 30% off.
Check American Peptides and apply LOOT10
Enter LOOT10, verify the actual discount in the cart, review the relevant product documentation and compare the final price before purchasing.
Supporting Reference Links
The following campaign/reference resources were supplied for use with this guide:
These pages should be treated as supporting campaign references. Product facts, prices and regulatory claims should continue to be checked against the relevant primary sources.
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