MK-677, Ostarine and RAD-140 Stack

Description

Our MK-677 ostarine and RAD-140 stack is a three-bottle set for researchers who want to compare two SARMs of different strength alongside a growth hormone secretagogue.

Buy the MK-677 ostarine and RAD-140 stack online

You get three full bottles: liquid ibutamoren, liquid ostarine and liquid testolone. 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 MK-677 ostarine and RAD-140 stack?

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. Ostarine (MK-2866) is the SARM with the most human trial data. It binds androgen receptors in muscle and bone with comparatively mild effects elsewhere. 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.

Ostarine and RAD-140 both bind the androgen receptor, but RAD-140 has a higher affinity and a longer half-life. MK-677 sits on a separate pathway, raising growth hormone and IGF-1.

Research behind the MK-677 ostarine and RAD-140 stack

Of the three, ostarine and MK-677 have the most human data. RAD-140’s evidence is mostly from animals and a small cancer trial. Combining two androgen receptor ligands is something you’d want to plan carefully, because effects like testosterone suppression may add up.

Before you run a combined protocol, read the trial data for each compound. The ostarine work is on PubMed.

MK-677 ostarine and RAD-140 stack specifications

• Contents: one bottle of liquid ibutamoren, one bottle of liquid ostarine, one bottle of liquid testolone
• MK-677 CAS: 159752-10-0
• Ostarine CAS: 841205-47-8
• RAD-140 CAS: 1182367-47-0
• MK-677 purity: 99.97% (COA 11/17/25)
• Ostarine purity: 98.04% (COA 07/08/25)
• RAD-140 COA date: 10/17/2025
• 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 MK-677 ostarine and RAD-140 stack comes from a batch tested by MZ Biolabs, an independent lab in Arizona. MK-677: 99.97% (COA 11/17/25). Ostarine: 98.04% (COA 07/08/25). RAD-140: COA 10/17/2025. Ask us for the full certificates and we’ll email them over.

MK-677 ostarine and RAD-140 stack FAQ

Why include two SARMs in one stack?

So researchers can compare a milder SARM (ostarine) with a stronger one (RAD-140) under the same conditions.

Is this stack good value?

Yes. It’s priced below the three single bottles combined, and it qualifies for free shipping on its own.

What concentration is each bottle?

The same as our single liquids: MK-677 at 25 mg/mL, ostarine at 25 mg/mL and RAD-140 at 15 mg/mL.

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 MK-677 ostarine and RAD-140 stack is sold for laboratory research only. It isn’t a dietary supplement, it isn’t approved by the FDA, and it isn’t for human or veterinary use. We’re a chemical supplier, not a medical provider, and nothing on this page is medical advice. Please don’t buy it for personal use or sports.

Add the MK-677 ostarine and RAD-140 stack to your cart, or build your own combination from our liquid SARMs.