Description
The RAD-140 and MK-677 stack combines one of the strongest SARMs we carry with a growth hormone secretagogue. Two bottles, two pipettes, one order.
Buy the RAD-140 and MK-677 stack online
You get two full bottles: liquid testolone and liquid ibutamoren. Buying them as a stack costs less than ordering each bottle on its own, and everything ships together in one package. Each bottle is filled from a batch with its own certificate of analysis, and each one has its own pipette, so there’s no cross-contamination between compounds. Browse more combinations in our SARMs stacks category.
What’s in the RAD-140 and MK-677 stack?
RAD-140 (testolone) is a high-affinity SARM from Radius Health with a long reported half-life and a strong anabolic profile in animal models. Ibutamoren (MK-677) is an oral growth hormone secretagogue. It acts on the ghrelin receptor and raises growth hormone and IGF-1 without touching the androgen receptor.
RAD-140 binds the androgen receptor with high affinity. MK-677 raises growth hormone and IGF-1 through the ghrelin receptor. The pathways are separate.
Research behind the RAD-140 and MK-677 stack
RAD-140’s data comes mostly from animal models and a small phase I trial. MK-677 has years of human trial data from Merck. That gap matters when you design a combined study.
Look at the published work on each before you start. MK-677 studies are on PubMed.
RAD-140 and MK-677 stack specifications
- Contents: one bottle of liquid testolone, one bottle of liquid ibutamoren
- RAD-140 CAS: 1182367-47-0
- MK-677 CAS: 159752-10-0
- RAD-140 COA date: 10/17/2025
- MK-677 purity: 99.97% (COA 11/17/25)
- Carrier: USP-grade PEG-400
- Packaging: UV-resistant glass bottles, graduated 1 mL glass pipettes, tamper-proof seals
Measuring and storage
Each compound comes in its own glass bottle with a graduated 1 mL glass pipette, so you can measure each one separately and keep your records clean. Label your draws by bottle, because the solutions look alike.
Store all the bottles upright, tightly capped and away from heat and direct sunlight. Room temperature is fine for PEG-400 solutions.
Lab testing and certificate of analysis
Each bottle in the RAD-140 and MK-677 stack comes from a batch tested by MZ Biolabs, an independent lab in Arizona. RAD-140: COA 10/17/2025. MK-677: 99.97% (COA 11/17/25). Ask us for the full certificates and we’ll email them over.
RAD-140 and MK-677 stack FAQ
Why pair RAD-140 and MK-677?
One acts on the androgen receptor and the other on growth hormone release, so they cover different mechanisms.
What concentrations are included?
RAD-140 at 15 mg/mL and MK-677 at 25 mg/mL.
Is RAD-140 suppressive?
Yes, studies report testosterone suppression. MK-677 isn’t an androgen.
Why researchers buy from Sports Technology Labs
Research only works when the material matches the label. That’s why an independent lab (MZ Biolabs) checks every batch we sell, and it’s why we print the COA date and purity on each page. We bottle in the USA and pack liquids in UV-resistant glass with tamper-evident seals. If a COA ever doesn’t match, we don’t sell the batch.
Shipping, returns and support
Spend $149 or more and shipping is free. Need it faster? Pick express at checkout. Every order is backed by our 60-day money-back guarantee, and our support team answers emails about COAs, batches and orders.
For laboratory research use only
The RAD-140 and MK-677 stack is supplied strictly for laboratory and analytical research. It is not approved by the FDA, is not a dietary supplement and must not be used in people or animals. Nothing here is medical advice, and we won’t sell it for personal or athletic use.
Add the RAD-140 and MK-677 stack to your cart, or build your own combination from our liquid SARMs.
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