SKU: 4715092689

ANDARINE (S4) – Solution, 1500mg (50mg/mL)

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Description

ANDARINE (S4) – Solution, 1500mg (50mg/mL)ANDARINE (S4) S 4, better known as Andarine and also referred to as Androxolutamide or GTx 007, is a Selective Androgen Receptor Modulator (SARM). In a notable study conducted by Gao et al., S 4 was characterized as an androgen receptor agonist in orchidectomized rats. The mechanism of action was found to focus on skeletal muscles, bones, and the pituitary gland. Effects of S 4 on Muscle Mass Male rats were treated for 8 weeks following castration

ANDARINE (S4)

S-4, better known as Andarine and also referred to as Androxolutamide or GTx-007, is a Selective Androgen Receptor Modulator (SARM). In a notable study conducted by Gao et al., S-4 was characterized as an androgen receptor agonist in orchidectomized rats. The mechanism of action was found to focus on skeletal muscles, bones, and the pituitary gland.

Effects of S-4 on Muscle Mass

Male rats were treated for 8 weeks following castration with either 3 mg/kg or 10 mg/kg of S-4. The study showed that both dosages were effective in restoring muscle mass and strength, both in the soleus muscle and in the levator ani muscle, to levels comparable to those of intact male rats. Read more here.

Treatment with S-4 had a minimal impact on the weight of the prostate and seminal vesicles, approximately 16-17%. However, strong androgenic effects on the prostate and seminal vesicles were observed.

Furthermore, both dosages exhibited strong agonistic activity in the pituitary gland, resulting in decreased plasma levels of both luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in the castrated male rats. Read more here.

Effects of S-4 on Bone Mineral Density

According to the study by Gao et al., an 8-week treatment with S-4 resulted in a significant increase in bone mineral density in castrated male rats.

In another study conducted by Kearbey et al., female Sprague-Dawley rats were treated to investigate the effects of S-4 on accelerated bone loss caused by ovariectomy. This study concluded that S-4 treatment not only maintained cortical content and overall bone mineral density but also increased bone strength while simultaneously reducing total body fat. Read more here.

Kearbey et al. also concluded that treatment with S-4 has positive effects on both skeletal muscles and bones. It was suggested that S-4 treatment could reduce the risk of fractures by both increasing bone mineral density and strengthening bones and skeletal muscles, which in turn reduces the likelihood of falls. Read more here.

Concentration
50mg/ml.

Half Life
4 – 6 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.

Data Sheet

Andarine (S-4) – Solution, 1500mg (50mg/mL)

Application Selective Androgen Receptor Modulator
CAS 401900-40-1
Molar Mass 441.357 g/mol
 Chemical Formula C19H18F3N3O6
IUPAC Name (2S)-3-(4-acetamido-phenoxy)-2-hydroxy-2-methyl-N-(4-nitro-3-trifluoromethyl-phenyl)-propionamide
Synonyms Andarine, Andarin, S-4, S-40503, GTx-007
Storage Room temperature
Solubility Soluble in Ethanol, PEG400
Organoleptic Profile Slightly Yellow, Transparent Liquid
Physical Form Solution in PEG400
Specification 50mg/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: 4715092689

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Blakely McAllister
Charlottesville, US
★★★★★ 5
Great toy for our best boys!
Color: Consuela the Cactus - Large, Size: Large Dog
You can never go wrong with BarkBox toys and this was no exception. Our dogs like toys that have squeakers and that they can tear into. This style of toy fits the bill. The design is cute as well. I’ve had this in the house for months and, while it’s definitely seen better days, it’s still intact and they haven’t gotten to the inner layer. (Not for want of trying.) The perfect type of toy for our fur babies.
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Reviewed in the United States on February 10, 2026
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Amazon Customer
Lowell, US
★★★★★ 5
Survives 7 months so far.
Color: Christmas Consuela, Size: Large Dog
It is still intact after nearly 7 months of constant play. My blue heeler normally destroys toys in just a few weeks. Consuela has exceeded expectations of survival with an extremely chewy, destruction prone dog.
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Reviewed in the United States on June 6, 2026
D
Verified Purchase
D. Thomas
Pawtucket, US
★★★★★ 4
Short-lived but much enjoyed as a chew toy
Color: Consuela the Cactus - Large, Size: Large Dog
I bought two of these for my "granddogs" in the size for Large dogs. The German Shepherd-mix stole the one intended for the border collie-mix and had both toys halfway destroyed within a day--I'm pretty sure they didn't survive much longer after that. Much enjoyed! Maybe I should've bought the Extra Large size, because the Large barely fit in her mouth and she wanted to play tug-of-war, so there wasn't much for me to grab onto. Then the border collie wanted in on the action (she's older, so she needed help tugging!) but there wasn't enough material for her to grab onto without accidentally sinking her teeth into me instead.
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Reviewed in the United States on December 9, 2025
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Ryan Davisson
West Palm Beach, US
★★★★★ 5
Best dog toy!
Color: Air Head, Size: Large Dog, Color: Air Head, Size: Large Dog
I got this toy for my dog who loves squeakers not only is it a two in one it actually has three toys inside which I think is amazing!! 10/10 recommend
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Reviewed in the United States on June 11, 2026
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VPBN
San Leandro, US
★★★★★ 5
Love all the Barkbox toys
Color: Christmas Consuela, Size: Large Dog
This is our third "Consuela"! Our dogs LOVE these toys, and they are the most durable we can find for our heavy chewers. They really like the ball inside as well. Highly, highly recommend these toys. I won't be buying other toys anymore, just barkbox.
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