SKU: 46479641874

OTR-AC (MK-29, OSTARINE-O-ACETATE) Solution, 750mg (25mg/mL)

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Description

OTR-AC (MK-29, OSTARINE-O-ACETATE) Solution, 750mg (25mg/mL)OTR AC (MK 29, OSTARINE O ACETATE) OTR AC, also known as MK 2866 Ester, is MK 2866 (Ostarine) that has undergone esterification (the process of combining an organic acid with an alcohol). This chemical process is used to maximize potency and extend the half life (the time required for a quantity to reduce to half of its initial value) of a substance. Due to this process, the ester version of ostarine has the capacity to remain bioactive ten times

OTR-AC (MK-29, OSTARINE-O-ACETATE)

OTR-AC, also known as MK-2866 Ester, is MK-2866 (Ostarine) that has undergone esterification (the process of combining an organic acid with an alcohol). This chemical process is used to maximize potency and extend the half-life (the time required for a quantity to reduce to half of its initial value) of a substance. Due to this process, the ester version of ostarine has the capacity to remain bioactive ten times longer. This results in benefits such as reduced dosing frequency and more stable blood levels.

How OTR-AC Works 
As the ester version of the selective androgen receptor modulator (SARM) ostarine, OTR-AC is more potent and has longer-lasting effects. By binding to proteins in the body known as androgen receptors, it stimulates the formation of muscle tissue. This, in turn, leads to an increase in muscle mass and strength.

Research on OTR-AC
Increase in Muscle Mass and Strength 
Studies suggest that OTR-AC, along with other SARMs, increases muscle mass and strength by stimulating the formation of muscle tissue:

  • In adult rats, the administration of SARMs, including OTR-AC, resulted in an increase in lean muscle mass and a decrease in body fat percentage.
  • In older male and female rats, OTR-AC administration resulted in increased lean muscle mass, decreased fat mass, and significant improvements in their ability to climb stairs.
  • Studies showed that OTR-AC may help increase muscle mass in rats with cancer cachexia (muscle wasting).
  • In older male and female rats, OTR-AC significantly improved total lean body mass and physical function.
  • In rats that had their ovaries surgically removed, OTR-AC improved muscle tissue.
  • In rats, OTR-AC increased muscle mass by enhancing the production of muscle cells.

Reduction of Body Fat 
Aside from helping gain muscle mass, OTR-AC has also been found to reduce overall body fat:

  • In Phase I and II clinical trials, OTR-AC has demonstrated promising results in increasing total lean body mass, decreasing total tissue fat percentage, and enhancing functional performance.
  • A review of studies showed that OTR-AC can help increase lean body mass and reduce body fat in overweight rats.
  • In a phase 2a study, the administration of OTR-AC along with other SARMs resulted in increased lean fat mass and decreased body fat percentage.
  • In male rats, OTR-AC increased fat cell breakdown by improving lipid metabolism and affecting the release of adiponectin (a hormone that regulates fatty acid breakdown).

Improvement of Bone Health 
Studies suggest that OTR-AC can help stimulate bone formation and protect against bone disorders:

  • In rats that had their ovaries surgically removed, OTR-AC administration resulted in improved bone healing.
  • In a rat model for aged male osteoporosis, both OTR-AC and testosterone treatments improved bone healing by increasing callus volume and area, bone volume and density, and bone width.
  • In a rat model of postmenopausal osteoporosis, high doses of OTR-AC for 5 weeks resulted in increased bone volume, density, and bone mineral density.

 

Reduction of Cholesterol Levels 
Evidence suggests that OTR-AC can help lower cholesterol levels, especially low-density lipoprotein (bad cholesterol):

  • In older male and female rats, OTR-AC administration resulted in a significant reduction in low-density lipoprotein levels.
  • In rats that had their ovaries surgically removed, OTR-AC treatment reduced blood cholesterol levels.

 

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 use. Please use with our DISCLAIMER before ordering.

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SKU: 46479641874

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Charlottesville, US
★★★★★ 5
Very NICE quality and worth the money!
Color: White, Size: 8 Panel
Ive gotten several folding privacy screens. This HALLYBEE one is a great 8 panel and the divider is TALLER than some other ones that I have gotten. Also the hinges fold in BOTH directions so you can fold the panels however you want. Some other screens only fold open in one direction like a Z. I thought that being a paper screen material that it would be less sturdy or too light, no this is not the case. The paper screen material looks fantastic and has lasted LONGER looking BETTER than the synthetic canvas webbing belt/leash fabric material on other screens - I just had to throw one of those out, but this one has been going strong and looks brand new still. Also this frame is taller and heavier and more sturdy. This screen is worth the money. I've gotten cheaper screens and they just fall apart so fast. Also because this divider is taller and wider, it is alot more privacy.
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Reviewed in the United States on January 6, 2026
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Belinda S.
Chelsea, US
★★★★★ 5
Perfect!
Color: Black, Size: 8 Panel
Amazing! Beautiful and sturdy
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Reviewed in the United States on May 9, 2026
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Khatereh
Lexington, US
★★★★★ 5
Good price, fast delivery and good quality
Color: Dark Mocha, Size: 8 Panel, Color: Dark Mocha, Size: 8 Panel
This is honestly the best room divider. It can completely separate the room and create a nice private space. I love it!
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Reviewed in the United States on March 9, 2026
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Jeremy Pitchford
Omaha, US
★★★★★ 4
Good room divider
Color: Dark Mocha, Size: 6 Panel
This room divider is sturdy and looks good. There were a few areas where the material was cracked, but overall it does its job. It’s not heavy and can easily be folded up and moved to a new area as needed.
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Reviewed in the United States on March 4, 2026
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COCO GOOD VIBES
Charlottesville, US
★★★★★ 5
Great Quality and Very Tall
Color: Dark Mocha, Size: 8 Panel
This is absolutely excellent! It’s very tall and you can’t see over it and I love it. It’s 6ft tall. It’s of very good quality material and looks perfect as a room divider between roommates in a shared space. I’d buy this again for sure if needed.
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Reviewed in the United States on February 5, 2026

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