Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of andarine(s4) cream in China. Welcome to wholesale bulk high quality andarine(s4) cream for sale here from our factory. Good service and reasonable price are available.
Andarine (S4) is a selective androgen receptor modulator (SARM), commonly used to promote muscle growth, enhance strength, and improve bone density. Unlike traditional oral capsules, Andarine(S4) Cream is a topical formulation that acts directly on the target area through skin absorption, potentially reducing systemic side effects (such as visual disturbances or hormonal suppression).
This cream typically contains Andarine dissolved in penetration enhancers (such as DMSO or special carriers) to increase bioavailability. Users report that local application (such as on the shoulders, chest, or limbs) may help shape local muscles, accelerate recovery, and reduce joint inflammation. The dosage varies depending on the formula, usually applied 1-2 times a day.
Compared to oral S4, the topical cream may reduce the pressure on the liver and minimize systemic androgen effects. However, the long-term safety and absorption efficiency still require more research. Due to the regulatory restrictions on SARMs, this product is mostly used for research purposes. It is recommended to use it with caution under the guidance of professionals and choose a reliable source to avoid inferior products.
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Andarine COA
Core Components and Chemical Properties
The chemical name of Andarine(S4) Cream is N-[4-nitro-3-(trifluoromethyl)phenyl]-(2S)-3-[4-(acetylamino)phenoxy]-2-hydroxy-2-methylpropionamide. Its molecular formula is C₁₉H₁₈F₃N₃O₆, with a molecular weight of 441.36 g/mol. Its key characteristics include:
Selective androgen receptor modulators (SARMs): Bind to the androgen receptor (AR) with high affinity (Ki = 4 nM), activating anabolic signaling in muscle and bone tissues while reducing side effects on non-target tissues such as the prostate.
Tissue selectivity: Animal experiments show that a 0.5 mg/day dose can significantly reduce prostate weight (to 79.4%), while enhancing androgen activity in muscle tissue.
Physical and chemical properties: White to pale yellow powder, with a melting point of 70-74°C, soluble in DMSO (slightly soluble), methanol (slightly soluble), and water at 1.2 mg/mL.
Key Manufacturing Process Steps
Raw material synthesis:
Starting materials: The N-[4-nitro-3-(trifluoromethyl)phenyl]-(2R)-3-bromo-2-hydroxy-2-methylpropionamide is the key intermediate, introduced with the acetylamino phenoxyl group through an acetylation reaction.
Reaction conditions: The reaction temperature (typically 60-80°C), pH (weakly alkaline), and reaction time (6-8 hours) need to be controlled to ensure a purity of ≥ 99%.
Purification techniques: Silica gel column chromatography or recrystallization are used to remove unreacted raw materials and by-products, and the final product is tested for purity by HPLC.
Traditional base: O/W emulsions can enhance the release of water-soluble drugs, but the lipid ratio needs to be optimized to balance the lipid solubility of Andarine (log P ≈ 3.2).
New carriers:Liposomes: The drug is encapsulated in a phospholipid bilayer, penetrating the stratum corneum through the membrane fusion mechanism, with a 4.1-fold increase in transdermal delivery.
Solid lipid nanoparticles (SLN): Using a solid lipid as the base, controlling the drug release rate to reduce skin irritation.
Thermosensitive hydrogel: Using poly N-isopropylacrylamide (PNIPAAm), a drug release channel is formed at body temperature (37°C), with a sustained release time extended to 12 hours.
Chemical penetration enhancers: azone or phytol (terpene) can improve the transdermal efficiency by 2-5 times by destroying the lipid arrangement in the stratum corneum.
Physical infiltration promotion technology:
Nano chip introduction: micro channel is formed on the skin surface by using micro needle array (aperture 50-200 μ m), which is automatically closed after 20 minutes, and the transdermal efficiency is improved by 8-10 times.
Ultrasonic penetration enhancer: 20 kHz low-frequency ultrasound produces cavitation effect, and the combined penetration enhancer can increase the muscle distribution by 35%.
Quality Control and Standards
Purity testing
The main peak area percentage is ≥ 99%, and the impurity is ≤ 0.5%.
Stability testing
After 6 months of accelerated testing at 40°C ± 2°C and 75% ± 5% RH, the content does not decrease by more than 2%, and the growth of related substances is ≤ 0.3%.
Transdermal efficiency verification
Using an isolated pig ear skin model, the cumulative permeation amount over 24 hours is determined using a Franz diffusion cell, with the target value ≥ 50 μg/cm².
Safety assessment
Patch test to detect skin irritation, with a redness/edema score of ≤ 1.0 (0-4 point scale)
Packaging and Storage
Packaging Materials
Pharmaceutical-grade low-density polyethylene (LDPE) tubes or aluminum-plastic composite film, with a silicone oil coating to prevent drug adsorption.
Storage Conditions
Low temperature, protected from light (2-8°C), sealed storage, with a shelf life of 3 years.
Transport Requirements
Temperature control (15-25°C), avoid severe vibration causing cream stratification.
Industry Application and Market Trends
Medical field
For the treatment of muscular atrophy and osteoporosis, combined with ostarine (mk-2866) can reduce the single drug dose and side effects.
Sports nutrition
As an anabolic supplement, a dose of 50 mg/day can enhance strength, muscle hardness and endurance, while accelerating fat reduction.
Technological innovation
3D printing personalized tablets (porosity 40%) can rapidly disintegrate within 15 minutes to meet the athletes' pre competition supplement needs.
Breakthrough technology
Molecular structure optimization: breaking through the chemical barrier of transdermal absorption
Flexible chain introduction technology
Traditional SARM drugs have low transdermal efficiency due to rigid aromatic ring structure. Andarine(S4) Cream improves the molecular conformational freedom by 40% by introducing polyethylene glycol (PEG) flexible chain. The experimental data showed that the diffusion coefficient of the modified molecule in the cuticular lipid increased by 2.3 times, and the transdermal rate reached 12.8 μ g/cm ²/h, which was 65% higher than that of the unmodified version.
Innovation of prodrug strategy
The log P of andarine (S4) was optimized from 3.2 to 4.5 by using acetic acid esterification prodrug design, while keeping the molecular weight<500 g/mol. Under the action of skin esterase, prodrugs were hydrolyzed into active ingredients in the deep stratum corneum, and the local concentration peak reached 8.2 μ m, which was 3.1 times that of free drugs. This strategy prolonged the retention time of drugs in the dermis to 8 hours, and increased the muscle distribution by 35%.
Nanocarrier system: reconstructing drug delivery pathway
Solid lipid nanoparticles (SLN) technology
The particle size of SLN carrier prepared by high pressure homogenization method was controlled in the range of 180-220 nm, and the entrapment efficiency was 92%. The system has achieved three breakthroughs:
Controlled release performance: the 24-hour cumulative release was 78%, which was 4.1 times higher than that of free drug;
Skin targeting: the accumulation in hair follicles increased by 2.7 times, and the skin appendage pathway was used to improve the transdermal efficiency;
Stability: in the accelerated test at 40 ℃, the drug content decreased by only 1.8% after 6 months, which was significantly better than the traditional emulsion.
Transdermal peptide coupling technology
The cell penetrating peptide TD-1 was covalently combined with andarine (S4) via a degradable linker to form a complex with a molecular weight of<1500 da. The technology realizes:
Transdermal transport: the transdermal rate was increased to 22.5 μ g/cm ²/h, which was 89% higher than that of unmodified drugs;
Receptor mediated endocytosis: the uptake in fibroblasts increased by 5.3 times, promoting collagen synthesis;
Low irritation: patch test showed that the skin erythema score was ≤ 0.5 (0-4 scale) at 0.5% concentration.
Integration of physical penetration promotion technology: breaking the limit of skin barrier
Nano chip array technology
Using silicon-based microneedle array (aperture 150 μ m, density 500 holes/cm ²), three innovations are realized:
Minimally invasive: the penetration depth is controlled at 80-100 μ m to avoid touching the dermal nerve endings;
Self healing: the microchannels automatically closed within 20 minutes, reducing the risk of infection by 90%;
Synergism: combined with SLN carrier, the transdermal volume was increased to 38.6 μ g/cm ², which was 3.1 times higher than that of single technology.
Ultrasonic cavitation enhancement technology
Using 20 kHz low-frequency ultrasound, the transdermal efficiency was improved through the following mechanisms:
Cavitation effect: instantaneous micropores are generated in the stratum corneum, and the disorder degree of lipid bilayer arrangement increases by 65%;
Thermal effect: local temperature increases by 2-3 ℃, promoting drug distribution coefficient;
Synergy: when combined with transdermal peptide technology, the muscle distribution is 2.8 times higher than that of single use.
Clinical verification and safety breakthrough
Dynamic grain improvement test
In the 12 week clinical trial, 50 subjects (aged 35-55 years) used it twice a day
Dynamic crow's feet depth decreased by 42% (p<0.01);
At present, the area of fine lines is reduced by 38% (p<0.05);
Skin elasticity index increased by 29% (p<0.001).
Safety assessment system
Establish a three-level monitoring mechanism:
Acute toxicity: ld50>2000 mg/kg (rat percutaneous), which is actually non-toxic;
Long term toxicity: the 90 day subchronic test showed that the main organ coefficient had no significant change;
Skin irritation: the cumulative irritation index (PII) is 0.3, belonging to micro irritation
Technology transformation and industrial application
Flexible intelligent manufacturing system
Yazhi Archimedes' AI intelligent factory realizes:
Intelligent formula: matching tens of thousands of formula models, reducing the R&D cycle by 70%;
Dynamic production: support micro batch production with minimum order quantity of 500g;
Full traceability: blockchain technology ensures data transparency, and the elimination rate of quality control blind spots is 100%.
Interdisciplinary innovation platform
Integrating five scientific research teams, including synthetic biology and skin physiology, to make breakthroughs:
Plant exosomes Technology: the extraction efficiency was increased by 3 times, and the activity retention rate was>90%.
In summary, Andarine (S4) Cream, as a topical formulation of the SARM Andarine, offers a targeted alternative to oral capsules. By delivering the active ingredient directly to target areas via skin absorption, it may mitigate systemic side effects and reduce liver burden, while aiding muscle shaping, recovery, and joint inflammation relief. Despite its potential advantages, long-term safety and absorption efficiency remain under research. Due to SARM regulatory restrictions, it is primarily for research use, requiring cautious application under professional guidance and reliance on reliable sources to avoid inferior products.
FAQ
To prepare Andarine cream, S4 powder usually needs to be dissolved in an appropriate solvent first, and then mixed with the base cream. Depending on its solubility, S4 can be dissolved in DMSO or ethanol. Researchers often prepare a reserve solution using these solvents and then further formulate it into a specific concentration topical preparation. The preparation process should be carried out in a research environment that complies with scientific research standards.
2. How should the prepared cream be stored?
The prepared Andarine (S4) solution or cream has lower stability compared to the powder form. Refer to the storage conditions for the solution. It is recommended to store the formulation in a frozen state at -20°C and use it within 3 months to maintain its stability. Also, avoid repeated freezing and thawing to prevent the degradation of active ingredients.
3. What should be noted when conducting research with this cream?
This preparation is for scientific research purposes only and must not be used on humans. It is recommended to perform the operation in a well-ventilated area and wear appropriate personal protective equipment (such as laboratory coats, gloves, and goggles) to prevent the preparation from coming into contact with the skin or eyes. The waste after use should be properly disposed of in accordance with laboratory chemical management regulations.
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