What is Andarine (S-4)?
Andarine (S-4) is a selective androgen receptor modulator that is often researched for its potential to help promote lean muscle mass and fat loss. It is a nonsteroidal SARM that potentially has anabolic properties.
| Product Name | Andarine S4 |
| CAS Number | 401900-40-1 |
| Molar Mass | 441.363 g.mol |
| Chemical Formula | C19H18F3N3O6 |
| IUPAC Name | (2S)-3-(4-acetamido-phenoxy)-2-hydroxy-2-methyl-N-(4-nitro-3-trifluoromethyl-phenyl)-propionamide |
| Synonyms | Acetamidoxolutamide; Androxolutamide; GTx-007; S-4 |
How does Andarine work?
Andarine works by binding to androgen receptors, particularly in muscle and bone tissues. When it comes to these receptors, it may stimulate synthesis, which could lead to muscle growth and fat loss in research subjects.
Because it is selective, it may target certain tissues without affecting others, which might reduce side effects associated with androgenic compounds.
What are the potential benefits of Andarine?
The clinical studies show that andarine has various potential benefits. However, it is still an underdeveloped chemical and more research is required to know its efficiency; it is only used for research purposes.
- Lean muscle mass: Research shows that andarine may help to increase or maintain lean muscle mass.
- Fat loss: Andarine could help in fat loss by increasing metabolic activity.
- Increased Strength: It may improve strength and stamina in research subjects, potentially enhancing overall performance.
Clinical Research
The clinical studies on Andarine are limited; however, it may have some potential benefits like increased muscle mass, fat loss, enhanced strength and muscle preservation. This chemical is still under investigation and is not approved by the FDA for human use.
More clinical studies are required to fully understand andarine’s safety and long-term efficacy.
FAQs
Is Andarine safe?
No, Andarine is an underdeveloped chemical that is not allowed for human consumption. It can only be used for research purposes.
Is Andarine legal?
Yes, it is considered legal as a research chemical. Andarine is not approved by the FDA for human consumption.
Where to buy Andarine S4 online for research purposes?
If you are looking to buy Andarine (S-4) online for research purposes, Chemyo is the right choice.
We provide reference materials with every product we sell. Each Chemyo SARM comes with an independent, third-party-issued Certificate of Analysis for identification, purity, and concentration.
Note: The SARMs collection at Chemyo includes research compounds like YK-11 (Myostine), RAD-150 (TLB 150)
 and more. Check out our Shop page for more SARM products.
How to store Andarine?
Andarine should be stored in a cool, dry place away from direct sunlight to maintain its stability.
What are some potential side effects of Andarine?
Andarine may cause some side effects such as visual disturbance (yellow-tinted vision), hormonal imbalance, suppression of natural testosterone, liver toxicity, and increased fatigue. However, more research is needed.
Note: This product is not fully developed and should not be consumed by humans. It should only be used in research settings and handled in a controlled environment.
Summary
Andarine (S-4) is a powerful compound being studied for its potential to increase lean muscle mass, enhance strength, preserve muscles, and promote fat loss. However, the product is still in its early stage of research. Some studies show its potential side effects, like testosterone suppression and vision impairment.
However, more clinical studies are required to analyze its long-term benefits and safety.

Bromantane Solution 50mg/ml – 50ml
ACP-105 Solution 10mg/ml – 50ml
PEG 400 - Solvent - 50ml
RU58841 | RU-58841 Solution 50mg/ml – 50ml
GW0742 Solution 10mg/ml – 50ml
AC262,536 Solution 10mg/ml – 50ml
S23 | S-23 SARM Solution 20mg/ml – 50ml
YK11 | YK-11 SARM Solution 10mg/ml – 50ml
ANDARINE S4 SARM Solution 50mg/ml – 50ml
MK-677 Ibutamoren Solution 25mg/ml – 50ml
GW501516 | Cardarine Solution 10mg/ml – 50ml
RAD 140 | Testolone RAD-140 Solution 10mg/ml – 50ml
MK-2866 and GW-501516 Value Pack
MK-2866 and MK-677 Value Pack
RAD-140 and MK-677 Value Pack
YK-11 and GW501516 Value Pack
Andarine (S4) and GW501516 Value Pack
Andarine (S4) and MK-677 Value Pack
YK-11 and MK-677 Value Pack
LGD-4 and MK-677 Value Pack
RU58841 Powder - 5g
SR9011 Powder – 1g
Myo-lnositol Trispyrophosphate (ITPP) Sodium Powder 1g
YK11 SARM Powder - 1g
OTR-AC | Ostarine-O-Acetate Powder - 1g
Cardarine GW-501516 Powder - 1g
Testolone RAD-140 SARM Powder 1g
LGD-4 Solution 10mg/ml – 50ml
MK2866 | Ostarine MK-2866 SARM Solution 25mg/ml - 50 ml 





Benson –
Quality product this is my favorite sarms
Larry edwards –
My order arrived again yesterday. I couldn’t wait, I ran S4 for 8 weeks during a caloric deficit. The vascularity and muscle hardness were immediate
Craig Kelton –
I tried S4 because I heard it was milder than steroids. While I did notice some fat loss, the vision flashes and the ‘night blindness’ were too much for me. I felt unsafe driving at night
Shin H –
the S4 Delivery was very prompt and packaging safe too,
Tyler smith –
Great product, as advertised. Very fast shipping!
Georgi –
Used this as a kickstarter for a cycle. My 1RM on bench and squat went up noticeably, which I didn’t expect from a ‘cutting’ SARM. It feels more ‘potent’ than Ostarine
Cecila –
Good stuff. Does what it is supposed to do