MK-677, YK-11, and LGD-4033 Stack

$174.00

Category: SARMs Stacks

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MK-677, YK-11, and LGD-4033 Stack For Sale

MK-677, YK-11, and LGD-4033 SARMs Stacks

Our MK-677, YK-11, and LGD-4033 stack includes one discounted 30 mL, 25 mg/mL bottle of MK-677, one discounted 30 mL, 10 mg/mL bottle of YK-11, and one discounted 30 mL, 10 mg/mL bottle of LGD-4033. Stack the savings!

About All Products

Includes graduated 1 mL glass pipettes for convenient measurement.
Glass bottles with UV resistance to minimize degradation.
Tamper-proof seals to ensure safety in transit.
Less than 5% variance in concentration, guaranteeing consistency.
Formulated and packaged to prevent evaporation in storage.
SKU: 31

FAQs for MK-677, YK-11, and LGD-4033 SARMs Stacks

What is the most significant difference between MK-677 and other growth hormone secretagogues (GHS)?

Unlike other GHS that directly act on the pituitary gland to stimulate growth hormone (GH) release, MK-677 stimulates the hypothalamus, a region of the brain that controls the pituitary gland. This indirect mechanism of action allows MK-677 to have a more sustained and consistent effect on GH levels.

What are the potential long-term effects of MK-677 on glucose metabolism?

Chronic MK-677 administration has been shown to cause insulin resistance in some animal studies. Insulin resistance is a condition where the body’s cells become less responsive to insulin, the hormone that regulates blood sugar levels. This can lead to an increased risk of developing type 2 diabetes.

What is the primary mode of action of YK-11?

YK-11 is believed to exert its effects through multiple mechanisms, including:

Activating androgen receptors: YK-11 binds to androgen receptors in muscle tissue, promoting muscle growth and strength.

Enhancing myostatin inhibition: Myostatin is a protein that limits muscle growth. YK-11 can suppress myostatin activity, allowing for greater muscle growth.

Increasing follistatin expression: Follistatin is a protein that binds to myostatin and inhibits its activity. YK-11 can increase follistatin expression, further enhancing myostatin inhibition.

How does LGD-4033 compare to other selective androgen receptor modulators (SARMs) in terms of selectivity?

LGD-4033 is considered to be one of the most selective SARMs available. This means that it has a high affinity for androgen receptors in muscle tissue and a relatively low affinity for androgen receptors in other tissues, such as the prostate gland and breast tissue. This selectivity helps to minimize the risk of side effects associated with non-selective androgenic compounds.

This preparation is for laboratory research purposes only and is not approved by the FDA for human use. MK-677 / IBUTAMOREN, YK-11, and LGD-4033 / LIGANDROL ARE NOT DIETARY OR SPORTS SUPPLEMENTS.

Why is Sports Technology Labs the best place to buy MK-677 SARMs Stacks online?

A recent study involving chemical analyses of 44 different products sold and marketed as selective androgen receptor modulators on the internet revealed that quality control in this industry varies significantly from one company to the next.

Only 52% of the products tested contained the product advertised, 59% contained amounts that differed from the label, a shocking 39% contained other unapproved drugs, 25% contained substances not listed on the label, and 9% contained no active substance at all. It is critical when performing research with SARMs to only purchase the highest quality, verified by third-party analysis.

If you are trying to figure out where to buy SARMs stacks, there appears to be no shortage of options out there. Sports Technology Labs is the best place to buy SARMs online because of their consistent, verifiable, high-quality products, safe bottling and packaging, fast shipping, and great customer service.

When you buy SARMs from Sports Technology Labs, you are choosing the highest quality ingredients. Minimum 98% pure compounds tested and certified by accredited American third-party labs, suspended in USP-grade (the highest grade) PEG-400, bottled in America.

Our products come in glass bottles with fixed glass droppers to prevent the leaching of unwanted plasticizers like BPA, and prevent contamination between testing with external measuring tools.

All Sports Technology Labs SARMs are third-party tested by MZ Biolabs, an independent laboratory based in Arizona. Each batch is bottled and tested in the USA to ensure accuracy and purity. Our Certificates of Analysis confirm that products meet the listed specifications:

Ligandrol / LGD-4033

Date: 10/26/25
Purity Level: 99.74%

Data on Our Liquid MK-677 for Sale

CAS Number: 159752-10-0
Formula: C27H36N4O5S
Molar Mass: 528.662 g/mol
Half-life: 24 hours
Class: Ghrelin agonist, growth hormone-releasing agent
Storage: Store in a cool, dry place away from direct sunlight to maximize shelf life.

Data on Our YK-11 for Sale

CAS Number: 1370003-76-1
Formula: C25H34O6
Molar Mass: 430.541 g/mol
Class: Myostatin inhibitor, selective androgen receptor modulator
Storage: Store in a cool, dry place away from direct sunlight to maximize shelf life.

Data on Our Liquid LGD-4033 for Sale

CAS Number: 1165910-22-4
Formula: C14H12F6N2O
Molar Mass: 338.258 g/mol
Half-life: 24-36 hours
Class: Selective Androgen Receptor Modulator
Storage: Store in a cool, dry place away from direct sunlight to maximize shelf life

Abuse Warning

Selective androgen receptor modulators are investigational compounds still awaiting FDA approval and are not dietary supplements. At Sports Technology Labs, we are chemical suppliers, not medical doctors, and our expertise is sourcing and quality control.

Sports Technology Labs does not encourage or condone consumer use of SARMs products; they are for research purposes only. Anecdotal reports and guides may not match those used in carefully designed medical research protocols and may pose a serious risk of adverse effects in users. Individual variables, comorbidities, and polypharmacy can also contribute significantly to the risk of health problems.

Selective androgen receptor modulators should only be used under the supervision and direction of a medical doctor or designated research authority. We strongly discourage the use of SARMs for performance enhancement in sports and bodybuilding, and warn against “bro science” and peer consensus when making decisions about health.