Anabol 4-19 (chemical name norclostebol acetate) is a derivative of the nandrolone compound, which is most often associated with deca durabolin. However, the decanoate ester attached to deca durabolin is very long, and it has a half-life of 14 days. Meanwhile, anabol 4-19 has a very short acetate ester attached to it, whose half life is just 3 days. This means you can recover much quicker after cycle, as the ester will clear out of your system three times faster than in the case of deca durabolin. Anabol 4-19 was created in the 1950's, but today it does not exist anymore. On paper, anabol 4-19 is five times more potent than testosterone in terms of its anabolic traits, and has about a quarter of the androgenic traits. Interestingly, unlike deca durabolin, anabol 4-19 does not aromatize, which means it does not have estrogenic side effects.

Norclostebol acetate is like many other synthetic anabolic steroids found on the market today. It is also frequently recognized as Anabol 4-19 and is designed as an injectable anabolic androgenic steroid. It's given its nickname (Anabol 4-19) because Norclostebol is derived from nandrolone, a 19-nortestosterone. The acetate is merely the name of the ester that modifies the base drug. Norclostebol acetate (Anabol 4-19) is derived from nandrolone. Deca durabolin is often marketed with the decanoate ester, giving a long half-life of about 14 days. The acetate ester is much shorter, equating to a more immediate release of potency or activity. Anabol 4-19, because it has the acetate ester attached, has a half-life of approximately three days. What's the difference? The acetate ester provides more immediate effects, and because of its short half-life, is typically taken more frequently. The longer esters often attached to steroids enable longer activity of the drug in the body, and reduce the frequency of injections, but their "potency" isn't as strong. For most, it's a trade-off.

Norclostebol acetate (Anabol 4-19), is not new, but was developed back in the 1950s. It's not available today, although some underground labs may manufacture it. It was perceived to be stronger than testosterone (up to five times as potent) in anabolic potential, with less than half of the androgenic characteristics associated with testosterone. In some ways, Anabol 4-19 could be compared to Trenbolone, commonly used today by bodybuilders because of its potency. Like Trenbolone, it was not designed for use on humans. Trenbolone is used to fatten cattle up prior to slaughter. Norclostebol acetate is/was used on cattle for breeding purposes.

Norclostebol acetate was known for its impressive capability to improve development of muscle mass and size for bodybuilders, without the negative side effects of aromatization or conversion of testosterone and estrogen. Nevertheless, anabolic androgenic steroids, even if they're rated low in androgenic capability, do sometimes produce progestational activity. Progestins behave much like estrogens in the body. Therefore, some of the negative side effects associated with aromatization are still possible, especially at higher dosages.

Anabol 4-19 Side Effects (Estrogenic):
Nordostebol is not aromatized by the body, and is not measurably estrogenic. An anti-estrogen is not necessary when, using this steroid, as gynecomastia should not be a concern even among sensitive individuals. Since estrogen is the usual culprit with water retention, nordostebol instead produces a lean, quality look to the physique with no fear of excess subcutaneous fluid retention. This makes it a favorable steroid to use during cutting cycles, when water and fat retention are major concerns.

Anabol 4-19 Side Effects (Androgenic):
Although classified as an anabolic steroid, androgenic side effects are still possible with this substance. This may include bouts of oily skin, acne, and body/facial hair growth. Anabolic/androgenic steroids may also aggravate male pattern hair loss. Women are also warned of the potential virilizing effects of anabolic/androgenic steroids. These may include a deepening of the voice, menstrual irregularities, changes in skin texture, facial hair growth, and clitoral enlargement. Additionally, nordostebol is not extensively metabolized by the 5-alpha reductase enzyme, so its relative androgenicity is not greatly altered by the concurrent use of finasteride or dutasteride. Note that nordostebol is a steroid with relatively low androgenic activity relative to its tissue-building actions, making the threshold for strong androgenic side effects comparably higher than with more androgenic agents.

Anabol 4-19 Side Effects (Hepatotoxicity):
Norclostebol is not a cl 7-alpha alkylated compound, and not known to have hepatotoxic effects. Liver toxicity is unlikely.

Anabol 4-19 Side Effects (Cardiovascular):
Anabolic/androgenic steroids can have deleterious effects on serum cholesterol. Norclostebol should have a stronger negative effect on the hepatic management of cholesterol than testosterone or nandrolone due to its non-aromatizable nature, but a much weaker impact than c-17 alpha alkylated steroids.

Anabol 4-19 History:
Nordostebol acetate was first described in 1956. It was developed into a medicine by Piam, which sold it briefly decades ago under the trade name Anabol 4-19. The 4-19 referred to the unique structural modifications to the steroid, namely that it was a 4-chloro 19-nortestosterone (nandrolone) derivative. Like its cousin Megagrisevit (clostebol acetate), nordostebol acetate was manufactured in both oral and injectable forms. The drug was ultimately less successful than even Megagrisevit (which also was a poor performer internationally), probably because it was developed during a very competitive time in the industry, when many effective agents were vying for pharmacy dollars. Anabol 4-19 was abandoned by the manufacturer many years ago, and has been unavailable for so long that few athletes have any memory of it.

Norclostebol is a potent anabolic compound with minimal tendency towards side effects, significantly stronger than pure testosterone but about the same as testosterone propionate due to the use of an ester. Norclostebol (brand name Lentabol) is a synthetic androgen and anabolic steroid that was derived from nandrolone. Norclostebol is also used as an ester, norclostebol acetate (brand name Anabol 4-19).