S4 Application Description
As a research chemical, S-4 belongs to a class of chemicals known as SARMS or selective androgen receptor modulators. Like typical androgens, SARMS bind to the androgen receptor however SARMS create selective anabolic activity.Compared to testosterone and other anabolic steroids and pro hormones, the advantage of SARMS such as S-4 is that they do not have androgenic activity in non-skeletal-muscle tissues.S4 was designed for treatment of conditions such as muscle wasting, osteoporosis and benign prostatic hypertrophy, using the non-steroidal androgen antagonist bicalutamide as a lead compound. As an orally active partial agonist for androgen receptors, S-4 is effective in not only maintaining lean body mass but actually increasing it.Andarine (GTx-007, S-4) is an investigational selective androgen receptor modulator (SARM) developed by GTX, Inc for treatment of conditions such as muscle wasting, osteoporosis and benign prostatic hypertrophy, using the non-steroidal androgen antagonist bicalutamide as a lead compound.Andarine is an orally active partial agonist for androgen receptors. It is less potent in bothanabolic and androgenic effects than other SARMs. In an animal model of benign prostatic hypertrophy, andarine was shown to reduce prostate weight with similar efficacy to finasteride,but without producing any reduction in muscle mass or anti-androgenic side effects. This suggests that it is able to competitively block binding of dihydrotestosterone to its receptor targets in the prostate gland, but its partial agonist effects at androgen receptors prevent the side effects associated with the anti-androgenic drugs traditionally used for treatment of BPH. Andarine S4 is a SARM that was developed for treatment of muscle wasting, osteoporosis and benign prostatic hypertrophy. S4 is effective in not only maintaining lean body mass, but increasing it while reducing body fat.How does S4 work ?
Selective androgen receptor modulators (SARMS) bind to the androgen receptor and demonstrate osteo (bone) and myo (muscular) anabolic activity.Binding and activation of the Androgen receptor alters the expression of genes and increases protein synthesis which ultimately builds muscle.SARMS such as S4 can cause muscle growth in the same manner as steroids, however unlike testosterone and other anabolic steroids, SARMS (as nonsteroidal agents) do not produce the growth effect on prostate and other secondary sexual organs. SARMS not only represent a new potential treatment option for a wide spectrum of conditions such as muscle wasting diseases (from age-related to AIDS or cancer-related), but they also have immense potential for muscle building for Bodybuilders, fitness and athletes.S-4 in particular binds to the androgen receptor in muscle and bone to a third of the affinity of Testosterone.S4 Dosage
A dosing protocol of 50-75mg for 4-8 weeks will give good recomp effects Diet must also be optimized to where calories are just above maintenance with at least 30% coming from lean sources of protein to get the best recomp effect.Of course, the recomp effects could be even greater if stacked or combined with a more anabolicSARM such as Ostarine.S4 For Cutting
A 50mg dosing protocol for 6-8 weeks is ideal for cutting purposes for the majority of users.However due to the vision side effects, if running at these doses some like to follow a 5 on 2 off protocol where S4 is used for 5 days followed by a 2 day break (then this cycle is repeated).
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| Product Name | CAS No. | Product Name | CAS No. |
| Sarms | |||
| Ostarine / MK-2866 | 841205-47-8 | MK-677 | 159752-10-0 |
| Cardarine / GW-501516 | 317318-70-0 | Andarine / S4 | 401900-40-1 |
| Ligandrol / LGD-4033 | 1165910-22-4 | RAD140 | 118237-47-0 |
| SR9009 | 1379686-30-2 | SR9011 | 1379686-29-9 |
| YK11 | 431579-34-9 | GW0742 | 317318-84-6 |
| Aicar | 2627-69-2 | S-23 | 1010396-29-8 |
| PRL-8-53 | 51352-87-5 | RU58841 | 1270138-41-4 |
| NSI-189 | 1270138-40-3 | ACP105 | 899821-23-9 |
| NSI-189 phosphate | 1270138-41-4 | AC 262536 | 870888-46-3 |
| Nootropic | |||
| Sunifiram | 314728-85-3 | Coluracetam | 135463-81-9 |
| Fasoracetam | 110958-19-5 | Noopept | 157115-85-0 |
| Adrafinils | 63547-13-7 | Unifiram | 272786-64-8 |
| Carphedon | 77472-70-9 | Pramiracetam | 68497-62-1 |
| Anesthetic / Pain Killer | |||
| Tetracaine Base | 94-24-6 | Prilocaine hydrochloride | 1786-81-8 |
| Tetracaine hydrochloride | 136-47-0 | Proparacaine hydrochloride | 5875-06-9 |
| Lidocaine hydrochloride | 73-78-9 | Pramoxine hydrochloride | 637-58-1 |
| Linocaine Base | 137-58-6 | Procainamide hydrochloride | 614-39-1 |
| Benzocaine hydrochloride | 23239-88-5 | Ropivacaine hydrochloride | 98717-15-8 |
| Benzocaine Base | 94-09-7 | Articaine hydrochloride | 23964-57-0 |
| Procaine | 59-46-1 | Bupivacaine | 2180-92-9 |
| Procaine hydrochloride | 1951/5/8 | Mepivacaine hydrochloride/Carbocaine | 1722-62-9 |
| Prilocaine | 721-50-6 | dibucaine hydrochloride | 61-12-1 |
| Other Pharmaceutical Intermediate | |||
| Flibanserin/Bimt 17/ Bimt-17-BS/Girosa | 167933-07-5 | Flibanserin HCl | 147359-76-0 |
| 7,8-dihydroxyflavones / 7,8-DHF | 38183-03-8 | 4'-Dimethylamino 7,8-Dihydroxyflavone | 1205548-00-0 |
| 1-Chloro-3,5-di-O-toluoyl-2-deoxy-D-ribofuranose | 3601-89-6 | P1301 | 1345680-97-8 |
| Triciribine | 35943-35-2 | 2,3-dichloroquinoxaline | 2213-63-0 |
| 2-Chloropropiophenone | 6084-17-9 | Pirespa | 53179-13-8 |
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