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Simms Research vs Oath Research: Which Shop Wins in 2026
Simms Research and Oath Research side by side on retatrutide and blend prices, lab reports, delivery, lost-parcel cover and payments, with Oath product names matched to Simms products.
Oath Research, which still signs its pages Oath Peptides, is an Arizona shop that opened in 2025 and prices toward the top of the market. Simms’s review of Oath Research covers the rename, the marketing and the testing record. This comparison starts where that review ends, with the questions left once Oath is on the shortlist and Simms Research is the other name on it: what each shop charges for the same vial, what paperwork comes with it, how fast it arrives, what happens if it doesn’t, and what moving an order takes.
Both shops sell freeze-dried research peptides and ship most orders within a day. Prices and terms on both sides are as listed on October 16, 2026.
Simms Research: what a new buyer can check
Simms Research sells freeze-dried research peptides and puts the proof next to the price. Its peptides are synthesized in cGMP-aligned facilities in the United States, and the batch report from an independent ISO-certified lab sits on the product page for every compound that has one, while every earlier batch stays listed on the lab results page. Each report gives the purity and how many milligrams the lab found in the vial, and the July 2026 reports add endotoxin, heavy-metal and microbial results.
The rest is just as easy to check before a first order. Support answers by email at support@simmsresearch.com and by phone at 855-592-8507, Monday to Friday from 9 a.m. to 5 p.m. Eastern, with most messages answered within one business day. The Free Delivery Guarantee is part of the shipping policy, and orders placed before 5 p.m. Eastern leave the same day.
Retatrutide, tirzepatide and blends: prices compared
On nearly every compound both shops sell, Simms Research charges less for a single vial, and the gap is widest on the weight-loss line and the blends: retatrutide costs $84 for 10mg at Simms against $125 at Oath. Here are the compounds Oath buyers order most, at each shop’s listed price for one vial:
| Compound | Oath Research | Simms Research |
|---|---|---|
| Retatrutide (GLP-3) | GLP3-R $125 for 10mg $210 for 20mg $280 for 30mg $450 for 60mg | $84 for 10mg $129 for 20mg $159 for 30mg $259 for 60mg |
| Tirzepatide (GLP-2) | GLP2-T $75 for 10mg $120 for 20mg $225 for 60mg | $65 for 10mg $95 for 20mg $186 for 60mg |
| Wolverine (BPC-157 + TB-500) | $150 for 20mg | $79 for 20mg |
| Glow (BPC-157 + TB-500 + GHK-Cu) | $175 for 70mg | $96 for 70mg |
| Klow (Glow + KPV) | $195 for 80mg | $122 for 80mg |
| TB-500 | $90 for 10mg | $66 for 10mg |
| GHK-Cu | $50 for 50mg $85 for 100mg | $48 for 50mg $76 for 100mg |
| Tesamorelin | $120 for 10mg $190 for 20mg | $95 for 10mg $158 for 20mg |
| CJC-1295 / Ipamorelin | $90 for 10mg | $78 for 10mg |
| NAD+ | $125 for 1000mg | $104 for 1000mg |
Oath’s prices drop as the quantity climbs, with the deepest cut at twelve of the same vial on most products, and new accounts get a sign-up discount. Even at that deepest tier, Oath lists its 10mg GLP3-R from $100. At Simms the $84 is the price of one vial, with no tier to reach, and every product dollar earns Simms Rewards points toward free peptides.
Lab reports on the vials Oath buyers order most
Simms Research posts a current batch report for retatrutide and tirzepatide, the two compounds most Oath buyers come for, and Oath’s public archive has none for its GLP3-R or GLP2-T, as the review covers. Where both shops post reports, the latest Simms sheets add endotoxin, heavy-metal and microbial results, and Oath’s public reports carry no heavy-metal or microbial result for any product. The latest Simms report for each, every one drawn from three vials:
| Compound | Simms Research, latest batch | Oath Research, public report |
|---|---|---|
| Retatrutide | Purity 99.611%; the lab measured 10.68mg against a 10mg label; endotoxin and heavy metals passed, no microbial growth | No public report for GLP3-R |
| Tirzepatide | Purity 99.777%; measured 10.57mg against 10mg; all three screens passed | No public report for GLP2-T |
| BPC-157 | Purity 99.651%; measured 10.19mg against 10mg; all three screens passed | Purity, identity and content; no endotoxin, heavy-metal or microbial result |
| GHK-Cu | Purity 99.819%; measured 52.05mg against 50mg; all three screens passed | Purity, identity and content; no endotoxin, heavy-metal or microbial result |
Measured content is the figure to use when mixing, and Simms’s guide to reading a batch report line by line explains the rest of the sheet.
Delivery speed, lost parcels and refunds
Simms Research ships later in the day, ships free from a lower order total, and covers more of what can go wrong after the box leaves. Orders placed before 5 p.m. Eastern ship the same day by UPS Standard, three to five business days, or by FedEx 2-Day, free on orders over $200. Simms ships to every US state and abroad.
Oath sends most orders by UPS two-day business air. Its cut-off is noon Arizona time on weekdays, 2 or 3 p.m. Eastern depending on the season, shipping is free from $250, and it ships only within the United States.
| If the order | Simms Research | Oath Research |
|---|---|---|
| Is lost in transit | Replaced at no charge, or refunded with the shipping | Listed for refund or replacement, though the terms also say Oath is not responsible for lost packages |
| Goes missing after a delivery scan | Replaced at no charge, or refunded with the shipping | Not mentioned in the terms |
| Arrives damaged | Replaced at no charge, or refunded; photos within 48 hours | Refund or replacement; photos within 48 hours |
| Holds a wrong or defective item | Replaced at no charge, or refunded | Refund or replacement |
| Is refunded | A refund of the affected products | May come as store credit in place of a cash refund |
| Needs a carrier claim | Simms works with the carrier; no claim for the buyer to file | Oath helps the buyer locate the parcel or work through the carrier’s claim |
The full wording is in Simms’s shipping policy and refund and return policy. Delays and customs holds sit outside the guarantee; loss, theft and damage are inside it, with nothing to buy at checkout. Oath’s FAQ puts its email replies at 24 to 48 hours on business days; most Simms messages are answered within one business day.
Paying and checking out
Simms Research takes more ways to pay: cards on all four networks, Mastercard included, Apple Pay and Google Pay, Klarna for paying over time, and Venmo, none of them with a surcharge. Oath’s terms list Visa, Discover and American Express cards, plus direct bank payment.
Signing in at a Simms checkout takes an email address and a one-time code, and there is no password. The payment options page shows how each method works, Venmo included.
Switching from Oath: names, sizes and rewards
Most Oath orders map one-to-one onto a Simms product sold under the compound’s own name, in the same or a larger vial. The weight-loss codes are the ones to translate (for the naming, see what GLP-3 means):
| At Oath Research | At Simms Research |
|---|---|
| GLP3-R, 5mg up to 60mg | Retatrutide (GLP-3), four sizes from 10mg up to 60mg |
| GLP2-T, 10mg up to 60mg | Tirzepatide (GLP-2), the same four sizes |
| “WOLVERINE” BPC-157/TB-500, 20mg | Wolverine Peptide Stack: BPC-157 and TB-500, 10mg apiece |
| “GLOW” BPC-157/TB-500/GHK-Cu, 70mg | Glow Peptide Blend, the same 70mg mix |
| “KLOW” BPC-157/TB-500/GHK-Cu/KPV, 80mg | Klow Peptide Blend, the same 80mg mix |
| CJC-1295/Ipamorelin, 10mg | CJC-1295 noDAC / Ipamorelin, 5mg + 5mg |
| AOD9604, Melanotan 2, Thymosin Alpha 1 | AOD-9604, 10mg; Melanotan II, 10mg; Thymosin Alpha-1, 10mg |
| Research Water | Research Water, a 10mL vial |
Vials from either shop mix the same way. Simms’s peptide calculator takes the measured milligrams from the batch report, the guides on how to reconstitute retatrutide and the retatrutide dosage guide cover the steps, and Research Water costs $20 a vial.
Store credit on an Oath account stays at Oath and has no cash value. At Simms, the first order adds 100 welcome points to Simms Rewards, every dollar spent on products earns five more, and points turn into free products, retatrutide and tirzepatide among them.
Which shop fits which order
| What the order needs | Better fit |
|---|---|
| Retatrutide or tirzepatide with a public batch report | Simms Research |
| A 30mg or 60mg retatrutide vial at the lower price | Simms Research |
| The Glow, Klow or Wolverine blend | Simms Research |
| Mastercard, a phone wallet, Klarna or Venmo at checkout | Simms Research |
| Free two-day shipping on an order over $200 | Simms Research |
| Cover for a parcel stolen after a delivery scan | Simms Research |
| Delivery outside the United States | Simms Research |
| Semaglutide, cagrilintide or bioregulator peptides such as Pinealon | Oath Research |
So, Simms Research or Oath Research? For the compounds both shops sell, Simms Research is the stronger buy: lower prices on one vial, a public batch report for retatrutide and tirzepatide with contaminant screens on it, free two-day shipping over $200, more ways to pay, and a written guarantee that covers a lost, stolen or damaged parcel. Oath keeps the edge on the compounds Simms doesn’t stock. The full Simms Research catalog has every product above, with the batch report on each page that has one.
Frequently asked questions
Is Simms Research cheaper than Oath Research?
On most compounds both sell, yes. Retatrutide runs $84 for 10mg at Simms against $125 at Oath, and $259 for 60mg against $450. The Glow, Klow and Wolverine blends cost $71 to $79 less at Simms.
Is Simms Research legit?
Yes. Its batch reports come from an independent ISO-certified lab and sit on each product page that has one, its support line at 855-592-8507 is staffed weekdays from 9 a.m. to 5 p.m. Eastern, and its Free Delivery Guarantee is in writing.
What is Oath’s GLP3-R called at Simms Research?
GLP3-R is retatrutide, sold at Simms as Retatrutide (GLP-3) in four sizes from 10mg to 60mg. GLP2-T is tirzepatide, sold as Tirzepatide (GLP-2).
Does Oath Research offer free shipping?
Yes, on US orders over $250. Simms Research ships free by FedEx 2-Day on orders over $200, and ships internationally as well.
Are Oath Peptides and Oath Research the same company?
Yes. Oath Peptides renamed itself Oath Research early in 2026; the shop, address and catalog stayed the same.
Does this comparison use a discount code?
No code and no affiliate link: the prices quoted are each shop’s own listed prices.