| Name | Type | Main Effects | Side Effects | Testosterone Suppression | Typical Cycle | Best For | Half-Life | Onset | PCT Needed | Toxicity |
| Andarine (S-4) | SARM | Fat loss, muscle dryness, increased strength | Vision tint issues | Medium | 6–8 weeks | Cutting, recomposition | ~4 hours | 7–10 days | Yes | Low |
| Cardarine (GW-501516) | PPARδ agonist | Endurance boost, fat oxidation, metabolism improvement | Potential risks at high doses | No | 6–12 weeks | Cutting, endurance | 16–24 hours | 3–5 days | No | Very low |
| Ibutamoren (MK-677) | GH secretagogue | Increases GH/IGF-1, recovery, improves sleep | Increased appetite, water retention | No | 8–16 weeks | Bulking, recovery | 20–24 hours | 5–7 days | No | Low |
| Ligandrol (LGD-4033) | SARM | Muscle and strength gain, improved recovery | Strong suppression | High | 6–8 weeks | Bulking | 24–36 hours | 7–10 days | Yes | Low |
| Ostarine (MK-2866) | SARM | Lean mass gain, joint support, mild recomposition | Mild suppression | Low | 6–8 weeks | Recomposition | 24 hours | 10–14 days | No | Very low |
| Mastorin (S-23) | Strong SARM | Strength, dry dense muscle, strong hardening effect | Very heavy suppression | Very high | 4–6 weeks | Advanced cutting, strength | ~12 hours | 3–7 days | Yes | Moderate |
| Stenabolic (SR-9009) | Rev-ERB agonist | Metabolism boost, fat loss, endurance | Frequent dosing required | No | 6–10 weeks | Cutting | 1–2 hours | 2–4 days | No | Very low |
| Testolone (RAD-140) | SARM | Strength gain, muscle mass, anti-catabolic effect | Suppression, irritability | High | 6–8 weeks | Bulking, strength | ~60 hours | 5–7 days | Yes | Low–medium |
| Myostan (YK-11) | Myostatin inhibitor | Rapid strength increase, accelerated hypertrophy, dense mass | Liver stress, aggression | High | 4–8 weeks | Bulking, strength | 6–10 hours | 5–7 days | Yes | Medium–high |
What is S23 SARM
S23 SARM is considered to be the most potent selective androgen receptor modulator. The drug made its first impression in the muscle-building world by being capable of gaining muscle and losing fat at the same time. S23 was originally developed as a male contraceptive, and early on it gained popularity among athletes and bodybuilders for being extremely hardening.
The majority of people who buy S23 SARM are already users who have previously used a modern velocity or weaker SARM and are simply looking for a stronger one. Several users equate S23 and Winstrol, or Trenbolone, in its dry vascularity quality, but without the intense androgenic effects of the two.
At the end of the day, S23 SARM is perfect for the athlete who wants to push hard and gain quality muscle to make them look like they’re ready to take to the stage. Correctly dosed, S23 SARM can significantly alter the body and induce asix overall feeling of overall hardness.
How S23 (Mastorin) Works
Mastorin S23 binds to the androgen receptors in muscles and bone, stimulates protein synthesis and growth in muscles and bone, as well as reduces fat mass. Unlike anabolic steroids, S23 does not aromatise to estrogen or cause water retention. The drug has a high receptor binding affinity, which means it has strong anabolic effects even at very low doses. This is one of the main factors why it is considered the strongest S23 SARM for sale.
S23 promotes anabolic activity and reduces luteinizing hormone and follicle-stimulating hormone once in the body. It is the suppression of these hormones that leads to temporary testosterone shutdown, which is the reason PCT is required when using. Anyway, S23 has an excellent anabolic-to-androgenic ratio.
Mastorin might be especially beneficial in cutting or recomp cycles in real life, where maintaining muscle mass while dropping fat is the goal. That’s what makes its mechanism so different from other drugs:
- Targeting specific receptors allows the creation of thick and high-quality muscle.
- Minimal estrogenic activity results in a dry and hard look.
- The short half-life of approximately 2 days provides flexible dosing regimens.
- Boosted metabolism allows you to burn through fat more rapidly.
- A higher density of fibers in the muscle is the reason for the firm look.
S23 works on the premise that you get an incredibly powerful anabolic drive which induces such a fine degree of control in the androgenic side of its effects. That is just an absolute necessity for an advanced athlete who is aiming for pro-level condition.
Benefits of S23 SARM
Mastorin is regarded as the most powerful SARM for both fat loss and muscle gain. Users frequently note it as being a ‘drying’ SARM, which helps you keep the look vascular without adding unnecessary water weight. Below are listed the main S23 SARM benefits for bodybuilders:
- Muscle thickness
Unprecedented hardness is a rather unusual effect of such mass-gaining supplements. This muscle complex has an excellent effect, as it creates muscles that look like competition-grade ones, but without the negative side effects. - Strength enhancement
S23 results in a significant improvement in muscular strength and endurance. Numerous athletes report that they can do more repetitions at the same level of tiredness without losing control over their breathing. - Fat loss and body recomposition
Mastorin S23 boosts metabolism, causing you to burn your stored fat rather than eating away at muscle. It is great for cutting cycles with the goal of losing fat and holding on to muscle. - Definition and vascularity
A positive effect that many S23 SARM users report is an increase in vascularity. You can expect that your veins will be more prominent and your muscles will be slightly more defined under your skin. - Caloric deficit
S23 SARM help the body to maintain anabolic activity in a caloric deficit. As far as how you will be in the mirror, TF, you are going to be “leaner” without being “fuller”.
The real beauty of S23 is the ability to build a body that looks aesthetically pleasing and powerful, and not just plain bigger. For athletes looking for aesthetics, it is among the best products on the market.
Side Effects of Mastorin (S23)
Mastorin S23 do have several advantages, but this is also a powerful SARM, and that will bring adverse reactions which can’t be ignored. For responsible use, you need to know how to deal with the most common SARMS S23 side effects:
- Suppression of testosterone
It has extremely androgenic activity, and because of this, it’s able to shut down your own testosterone production. To counteract this, the majority of individuals do a PCT regimen consisting of Clomid, Nolvadex, or other drugs to get hormone levels back to a normal state. - Changing libido
A lot of people notice an uptick in libido while on Mastorin S23 and then a lacklustre one once the cycle ends. The cyclical fluctuations may be due to a state of hormonal balance that varies with individuals. As already mentioned, a well-planned PCT will assist you in managing such symptoms, as well as helping you preserve your overall performance. - Energy and mood changes
As S23 SARMs affect hormone levels, some people may feel a temporary dampening of their moods and energy. These are usually mild effects, as they should go away with a recovery period. Proper diet and maintaining a good routine for sleep can help minimise these effects. - Potential hair loss or oily skin
Sometimes Mastorin S23 can cause a mild androgenic reaction on your body, including hair loss or very oily skin. These side effects will be temporary and can be blunted in most cases with hygiene and PCT. - Potential impact on fertility
That said, long cycles or very high doses might temporarily suppress sperm production and negatively affect fertility. Always do your cycles accordingly and build in time to recover between them.
In general, these side effects are controllable with the right cycle length and PCT. The potency of the compound means that it should be respected, but you shouldn’t be scared of it. Listen to your body and treat the recovery time as integral to the training time.
S23 SARMs Dosage, Cycle Length, and Safe Use
Accuracy is everything in the case of Mastorin’s s23. This substance is among the strongest SARMs available in the market. Hence, as mentioned above, cycle planning is essential and can either yield stellar outcomes or screw up your hormonal profile.
Optimal dosage
The recommended SARMs S23 dosage is usually 10–30mg per day based on your fitness level and experience. To test your tolerance, most novices should begin with 10 mg, and more advanced users can take 30 mg. The daily dose can be divided into 2 doses, taken twice daily, since S23 has a short half-life. This will help maintain a steady level in your system. If you take more than 30mg per day, it won’t result in faster gains and could lead to testosterone shutdown.
Recommended cycle length
A standard S23 SARM cycle length is 6 to 8 weeks, which is a good duration to be effective enough and not too much for the body. You’re going to get real strength and density increases in your muscles without wrecking your endocrine system. You will need to do post-cycle therapy for 4 weeks 1 after the cycle to reboot your natural testosterone production. Also, you will normally see S23 results around the 3rd or 4th week of use.
Safe use tips
A sensible bodybuilder can easily be distinguished from a reckless one by their straightforwardness. Mastorin S23, while a powerful supplement, requires caution when using. Many athletes still make mistakes along the way, and here’s some advice to follow:
- You should have your bloods done regularly before, during and after your cycle to monitor your hormone levels, liver enzymes, and lipids.
- Eat high-quality protein and complex carbs to fuel muscle recovery and energy levels.
- Use a natural test booster on cycle, because you will get some suppression from this SARM.
- S23 sends your body for a target-specific workout, and recovery starts to take on an even level of importance. You sleep for 7–9 hours and drink loads of water.
- Compounds such as Clomid or Nolvadex are not optional once you’re done with your cycle. They help normalise hormone function so you can keep the gains.
- Leave at least 8–10 weeks before you start another S23 cycle so your body can rest.
- The outcome will ultimately depend on how disciplined you are. As long as you’re putting in the work with consistent training, that’s how you’ll get the best results long-term.
You can enjoy the SARMs S23 benefits of no dangerous anabolic steroids, at the same time as obtaining an aesthetic physique. But long-term success is not about pushing the limits. Rather, it’s harnessing all the tools, such as Mastorin S23, with patience.
Mastorin (S23) Stacking with Other Compounds
Mastorin S23 stacking is usually used to refine definition or maintain muscle in calorie deficits. When cutting, it is known to be stacked with Cardarine (GW-501516) or Andarine (S4) for amazing S23 SARM before and after results. This formula leads to better endurance and more fat burning. Also, this stack is especially beneficial for competition or photo shoot preparation.
To help gain muscle and shed fat at the same time, you may want to stack S23 with SARMs like Ligandrol or MK-677 for body recomp. Ligandrol allows a gradual increase in lean tissue, whereas MK-677 facilitates recovery and sleep via increased growth hormone secretion. With the addition of S23, this stack gives users the ability to keep strength while training and gain high-quality lean tissue.
Sometimes, beginners try heavily suppressive compounds even such as RAD-140 or YK11. These stacks exert more strain on the hormonal system and have to be recovered from more. A better suggestion is to start with semi-mild SARMs or peptide-based support. Whatever the stack, all users should conclude the cycle with a proper PCT for higher T levels, but also to maintain results.
Common Beginner Mistakes When Using Mastorin (S23)
Being a novice or experienced athlete, you can still screw up and end up with fewer results than you expected. The following are the most frequent mistakes people make and how to prevent them:
- Starting with a high dose
A lot of new users think that the more they take, the faster the gains are going to be, but with S23 SARMs, a larger dose just means more T suppression. After you have ensured that you are prepared for starting the cycle, it is recommended to begin at 10–15 mg per day. - No post-cycle therapy
With Mastorin, your suppression can be extremely hard, and even if you don’t do PCT at the end of the cycle, you can lose your strength and even become depressed. - Poor diet
If you use the stronger compounds to lose body fat off your gut, but you still have to eat right. The fact is, no matter how strong the steroid, you can’t preserve muscle if you don’t have proper nutrition. You need enough protein and some healthy fat to keep the most muscle. - Combining too many compounds
Using S23 with other SARMs or steroids may be too much for your body. For those of you new to this, keep the stack to 1 or 2 softer compounds like Cardarine and MK-677. The right combination can deliver steady gains, but a random stack will give you hormonal crashes. - Too long a cycle
S23 is a powerful compound, so don’t use it for more than 6–8 weeks. Extending a cycle too long will mean even deeper suppression and difficult recovery. Be sure that pauses between cycles will give you better hormone balance.
With the right approach and avoidance of pitfalls, you can buy S23 SARMs safely and enjoy the muscle growth benefits with minimal risks. If you still make some mistakes, don’t hesitate to seek professional help and don’t neglect your health.





Marco –
Se volete un composto hardcore per il taglio o la ricomposizione, questa è la scelta giusta. L’S23 di Zillt mi ha dato un aspetto asciutto e magro più velocemente di qualsiasi altra cosa. Sono soddisfatto del prezzo e della potenza di questo farmaco del vostro negozio.
Tobias Klein –
Ich habe hier einige Bewertungen von anderen Sportlern gelesen und mich entschlossen, den Sprung zu wagen. Ich bin sehr zufrieden damit, wie schnell es wirkt. Meine Kraft und Ausdauer im Fitnessstudio haben sich deutlich verbessert.
Florian Z. –
J’ai déjà suivi d’autres cycles de SARM, mais aucun n’était comparable au S23. La densité musculaire que vous obtenez avec ce produit est incroyable, et j’ai remarqué une différence après 3 semaines. Il suffit donc d’être prudent avec le dosage.
Daniel W. –
Mastorin S23 isn’t a joke, because I find it very strong. I could already tell that it works after a few days, but I’m an experienced bodybuilder. Also, shipping to the USA was extremely fast, and the price is amazing.