SKU: 47460479178

OSTARINE (MK-2866) – Solution, 750mg (25mg/mL)

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Description

OSTARINE (MK-2866) – Solution, 750mg (25mg/mL)OSTARINE (MK 2866) Ostarine MK 2886 is a non steroidal Selective Androgen Receptor Modulator (SARM) with tissue selective anabolic and androgenic pharmacological properties. In the scientific literature, it is also known as enbosarm, GTx 024, or S 22. This SARM was originally discovered in 1998 by James T. Dalton, Duane D. Miller, Karen A. Veverka, and their respective research teams at Ohio State University, the University of Tennessee, and GTx. GTx

OSTARINE (MK-2866)

Ostarine MK-2886 is a non-steroidal Selective Androgen Receptor Modulator (SARM) with tissue-selective anabolic and androgenic pharmacological properties. In the scientific literature, it is also known as enbosarm, GTx-024, or S-22.

This SARM was originally discovered in 1998 by James T. Dalton, Duane D. Miller, Karen A. Veverka, and their respective research teams at Ohio State University, the University of Tennessee, and GTx. GTx acquired the licensing rights from these research teams and further sublicensed the development of MK-2886 to Merck & Co.

MK-2886 is one of the first SARMs to be synthesized and studied in both rats and primates, making it one of the most extensively researched SARMs.

In one study focusing on adult rats, specifically their fat cells or adipocytes, the administration of MK-2886 Ostarine reduced the expression of fat-related hormones like leptin and adiponectin mRNA. Researchers concluded that MK-2886 is likely to have an effect similar to that of testosterone on the AR receptors, leading to a reduction in body fat in rats. Source

Another study showed that MK-2886 Ostarine also stimulates bone growth in rats. At the highest dosage, 4 mg/kg, the test subjects exhibited improved bone density, quicker healing time, and higher markers of bone growth hormones such as phosphorus and alkaline phosphatase.

Interestingly, all rats in the research group showed an increase in the weight of the gastrocnemius muscle, even at the lowest dosage of 0.04 mg/kg. Serum cholesterol levels were also lowered in this group, indicating an improved lipid profile. Source

In a subsequent study, similar results were observed; rats with clinically induced osteoporosis showed increased bone density when treated with moderate to high doses of MK-2866. Source

A third study evaluated muscle growth in mice genetically modified to lack traditional androgen receptors. After removing the mice's endogenous testosterone-producing cells, muscle degradation began, and MK-2886 treatment was initiated. These mice showed muscle growth in androgen-sensitive muscles via an alternative pathway, different from that of the traditional androgen receptors. Source

Concentration
25mg/ml.

Half life
24 hours.

DISCLAIMER
This material is sold for use in laboratory research only. Terms of sale apply. Not for human consumption, nor for medical, veterinary or domestic use. Please familiarize yourself with our DISCLAIMER before ordering.

Data Sheet

Ostarine (MK-2866) – Solution, 750mg (25mg/mL)

Application Selective Androgen Receptor Modulator
CAS 841205-47-8
Molar Mass 389.33 g/mol
Chemical Formula C19H14F3N3O3
IUPAC Name ((2S)-3-(4-cyanophenoxy)-N-[4-cyano-3-(trifluoromethyl)phenyl]-2-hydroxy-2-methylpropanamide)
Synonyms Ostarine, Enobosarm, GTx-024, MK-2866
Storage Room temperature
Solubility Soluble in Ethanol, PEG400
Organoleptic Profile Clear liquid
Physical Form Solution in PEG400
Specification 25mg/mL ±5%
Terms This material is sold for laboratory research use only. Terms of sale apply. Not for human consumption, nor medical, veterinary, or household uses. Please familiarize yourself with our Terms & Conditions prior to ordering.
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SKU: 47460479178

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Karen
Lexington, US
★★★★★ 5
Great chew
Flavor Name: Beef, Size: Large
Excellent! My super chewer loves it! He chews it everyday and it holds up!
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Reviewed in the United States on May 1, 2026
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jennabailey1272
Louisville, US
★★★★★ 4
Decent durability
Flavor Name: Beef, Size: Small
My super chewer pit bull mix loved these! They lasted several weeks.
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Reviewed in the United States on April 16, 2026
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David
New York, US
★★★★★ 5
Best chew toy we have ever purchased.
Flavor Name: Classic, Size: Large
My moderately active 80lb Lab - Pit mix has been steadily working on this bone for over a year. He doesnt chew it every day but he does regularly chew it for 30 or more minutes at a time. He has only been chewing on the smooth end, and the only wear it shows is a slight thinning and some grooved tooth marks. It has not had any chunks come off, and has never developed any sharp edges that make it hard to play with. It has never smelled or gotten slimy. It has never triggered resource guarding with him, but he likes it enough that presenting it to him will often get him to settle down and chew when he is in a rambunctious mood. Its size and shape allows him to hold the textured Y end with his paws while chewing on the smooth end. All in all a fantastic toy!
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Reviewed in the United States on February 15, 2026
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Lindsay
New York, US
★★★★★ 5
Happy Doggo
Flavor Name: Beef, Size: Small
He immediately loved it. He doesn't take to bones quickly, but this one caught his eye. He's a 35 lb shepherd mix, and loves antlers, and chews pretty hard. I love that it doesn't smell, and havne't seen or noticed flakes. Overall would recommend.
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Heather
Louisville, US
★★★★★ 5
Excellent product, highly recommend
Flavor Name: Classic, Size: Large, Flavor Name: Classic, Size: Large
So glad I came across this brand that uses actual edible material instead of the plastic nylon! All of our dogs love the nylon chew toys, but it's so bad for them to eat the little plastic bits! I got the large one & it is VERY large! I actually wish they had a medium one, one in-between the large & small ones as an option. But our dogs still love the large one, just harder for them to carry around & boy is it loud each time it gets dropped on the hardwood floor. It's big enough both the pups can chew on it together at the same time & do just that. We've had it for a couple months now & they don't chew on it everyday, but a few times a week I'd say & it's a tad bit softer than the nylon chews, but I'd say it's held up very well!
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Reviewed in the United States on August 11, 2025

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