Parabolan — trenbolone hexahydrobenzylcarbonate

Trenbolone hexahydrobenzylcarbonate is a slow-acting injectable ester of the potent anabolic steroid trenbolone. Trenbolone appears most commonly as trenbolone acetate, which is a much faster-acting form of the drug (see: Finajet). The hexahydrobenzylcarbonate ester used here extends the release of trenbolone for more than 2 weeks, which has always been thought of as more suitable for human use due to the less frequent injection schedule. The base steroid trenbolone is roughly three times more androgenic than testosterone, making it a fairly potent androgen. It also displays about 3 times greater tissue-building activity in comparison to its androgenic properties, making its official classification as that of an anabolic steroid. The muscle-building effect of trenbolone is often compared to such popular bulking agents as testosterone or Dianabol, but without the same estrogenrelated side effects. It is most commonly identified as a lean-mass-building drug, and is extremely popular with athletes for its ability to promote the rapid buildup of strength, muscle size, and definition.

Brand name Parabolan, Trenbolone hexahydrobenzylcarbonate
Androgenic 500
Anabolic 500
Standard Nandrolone acetate
Chemical Names 17beta-Hydroxyestra-4,9,11-trien-3-one
Estrogenic Activity none
Progestational Activity moderate

Trenbolone Hexahydrobenzylcarbonate History

The first long-acting trenbolone ester (undecanoate) was studied in 1967, described during a series of experiments into synthetic anabolic steroids by Roussel-UCLAF. Trenbolone hexahydrobenzylcarbonate was a subsequent and uniquely French slant to this long-acting anabolic steroid, possessing an unusual but roughly equivalent compound. Trenbolone hexahydrobenzylcarbonate was developed into a medicine by Negma Laboratoires in France, which sold the drug under the Parabolan trade name. It was also sold for a period of time as Hexabolan, a name that referred to the unusual ester it possesses. Trenbolone hexahydrobenzylcarbonate is the only known form of trenbolone ever produced as a medicine for human consumption. The most notable appearance of trenbolone comes as trenbolone acetate, which is used widely and exclusively in veterinary medicine.

Parabolan was prescribed in France as a protein-sparing anabolic agent in cases of cachexia (lean body mass wasting) and malnutrition, as well as to combat certain forms of osteoporosis. Its prescribing guidelines included recommendations for the treatment of androgen-sensitive populations, such as women and the elderly. Owing to its moderate androgenic properties, however, the drug was contraindicated in children, especially young females. Parabolan remained on the French market for a very long time, although it was finally discontinued (voluntarily) by Negma in 1997. For a brief period of time it seemed that the demise of Parabolan would mark the end of human-use trenbolone preparations, as no other medicine approved for human use was known to exist worldwide at the time. A very small number of Parabolan preparations have been brought to market since, however, so while the drug is still poorly available, it is not completely defunct.

How is Trenbolone Hexahydrobenzylcarbonate Supplied

Trenbolone hexahydrobenzylcarbonate is no longer produced as a prescription drug product. When manufactured in France it came in the form of a 1.5 mL ampule containing 76 mg of steroid (product information lists this as equivalent to 50 mg of base trenbolone).

Structural Characteristics of Trenbolone Hexahydrobenzylcarbonate

Trenbolone is a modified form of nandrolone. It differs by the introduction of double bonds at carbons 9 and 11, which inhibit aromatization (9-ene), increase androgen-binding affinity, and slows its metabolism. The resulting steroid is significantly more potent as both an anabolic and an androgen than its nandrolone base. The trenbolone here is modified with a hexahydrobenzylcarbonate ester at the 17-beta hydroxyl group, so that the free steroid is released more slowly from the area of injection.

Trenbolone Hexahydrobenzylcarbonate Side Effects (Estrogenic)

Trenbolone is not aromatized by the body, and is not measurably estrogenic. It is of note, however, that this steroid displays significant binding affinity for the progesterone receptor (slightly stronger than progesterone itself ). The side effects associated with progesterone are similar to those of estrogen, including negative feedback inhibition of testosterone production and enhanced rate of fat storage. Progestins also augment the stimulatory effect of estrogens on mammary tissue growth. There appears to be a strong synergy between these two hormones here, such that gynecomastia might even occur with the help of progestins, without excessive estrogen levels. The use of an anti-estrogen, which inhibits the estrogenic component of this disorder, is often sufficient to mitigate gynecomastia caused by progestational anabolic/androgenic steroids. Note that progestational side effects are more common when trenbolone is being taken with other aromatizable steroids.

Trenbolone Hexahydrobenzylcarbonate Side Effects (Androgenic)

Although classified as an anabolic steroid, trenbolone is sufficiently androgenic. Androgenic side effects are still common with this substance, and 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, the 5-alpha reductase enzyme does not metabolize trenbolone575, so its relative androgenicity is not affected by finasteride or dutasteride.

Trenbolone Hexahydrobenzylcarbonate Side Effects (Hepatotoxicity)

Trenbolone is not c-17 alpha alkylated, and is generally not considered a hepatotoxic steroid; liver toxicity is unlikely. This steroid does have a strong level of resistance to hepatic breakdown, however, and severe liver toxicity has been noted in bodybuilders abusing trenbolone. Although unlikely, hepatotoxicity cannot be completely excluded, especially with high doses.

Trenbolone Hexahydrobenzylcarbonate Side Effects (Cardiovascular)

Anabolic/androgenic steroids can have deleterious effects on serum cholesterol. This includes a tendency to reduce HDL (good) cholesterol values and increase LDL (bad) cholesterol values, which may shift the HDL to LDL balance in a direction that favors greater risk of arteriosclerosis. The relative impact of an anabolic/androgenic steroid on serum lipids is dependant on the dose, route of administration (oral vs. injectable), type of steroid (aromatizable or non-aromatizable), and level of resistance to hepatic metabolism. Due to its non-aromatizable nature and strong resistance to metabolism, trenbolone has a moderate to strong (negative) impact on lipid values and atherogenic risk. Anabolic/androgenic steroids may also adversely affect blood pressure and triglycerides, reduce endothelial relaxation, and support left ventricular hypertrophy, all potentially increasing the risk of cardiovascular disease and myocardial infarction.

To help reduce cardiovascular strain it is advised to maintain an active cardiovascular exercise program and minimize the intake of saturated fats, cholesterol, and simple carbohydrates at all times during active AAS administration. Supplementing with fish oils (4 grams per day) and a natural cholesterol/antioxidant formula such as Lipid Stabil or a product with comparable ingredients is also recommended.

Trenbolone Hexahydrobenzylcarbonate Side Effects (Testosterone Suppression)

All anabolic/androgenic steroids when taken in doses sufficient to promote muscle gain are expected to suppress endogenous testosterone production. Without the intervention of testosterone-stimulating substances, testosterone levels should return to normal within 1-4 months of drug secession. Note that prolonged hypogonadotrophic hypogonadism can develop secondary to steroid abuse, necessitating medical intervention. In experimental studies, trenbolone was determined to be approximately three times stronger at suppressing gonadotropins than testosterone on a milligram for milligram basis.

Trenbolone Hexahydrobenzylcarbonate Administration (Men)

Trenbolone hexahydrobenzylcarbonate was generally administered in a clinical dosage of 3 ampules per month. Therapy was initiated the first month with all 3 ampules given over the first 15 days. During the subsequent 3 months, one injection (76 mg) was given every 10 days. For physique- or performance-enhancing purposes, trenbolone hexahydrobenzylcarbonate is most often administered at a dosage of 152-220 mg per week. The drug would be taken in cycles ranging from 6 to 12 weeks. Although a weekly administration schedule would be more than sufficient, athletes usually injected a single ampule (76mg) at a time, and the total amount would be spread evenly throughout the week. Although not necessary, this type of schedule helps to reduce injection volume per application. The results with the use of trenbolone hexahydrobenzylcarbonate should be a visibly more muscular physique (larger, leaner), and, if body fat levels are low enough, that hard ripped look most valued by dieting and competitive bodybuilders.

While this drug is quite potent when used alone, it is sometimes combined with other steroids for an even greater effect. Leading up to a show one could successfully add a nonaromatizing anabolic such as Winstrol or Primobolan. Such combinations will elicit a greater level of density and hardness to the build, often proving dramatic for a stage appearance. We could also look for bulk with this drug, and addition stronger compounds like Dianabol or Testosterone. While the mass gain would be quite formidable with such a stack, some level of water retention would probably also accompany it. Moderately effective anabolics such Deca-Durabolin or Equipoise would be somewhat of a halfway point, providing extra strength and mass but without the same level of water bloat we see with more readily aromatized steroids.

Trenbolone Hexahydrobenzylcarbonate Administration (Women)

Trenbolone hexahydrobenzylcarbonate was generally administered in a clinical dosage of 3 ampules per month. Therapy was initiated the first month with all 3 ampules given over the first 15 days. During the subsequent 3 months, one injection (76mg) was given every 10 days. Given the risk of virilization, lower doses were likely used by physicians with many female patients. This agent is generally not recommended for women for physique- or performance-enhancing purposes due to strong androgenic nature and tendency to produce virilizing side effects.

Trenbolone Hexahydrobenzylcarbonate Availability

Pharmaceutical preparations containing trenbolone hexahydrobenzylcarbonate remain scarce. In reviewing some of the remaining products and changes in the global pharmaceutical market, we have made the following observations.

Balkan Pharmaceuticals (Moldova) makes the product Parabolan. It contains 100 mg/mL of steroid, and is packaged in 1 mL ampules and multi-dose vials of 5 mL and 10 mL.

Parabolan is produced by Swiss Remedies and available across Europe. Due to numerous fakes of this product, Swiss Remedies offers a convenient online product checker.

Magnus Pharmaceuticals makes the product Parabolan primarily for the EU and UK markets. Due to fake products appearing on the market, Magnus offers an online checker that lets steroid users verify their product originality.

Bodybuilders reference

Parabolan was reported to be the most effective injectable anabolic/androgenic steroid available today. Real Parabolan provided users with a rapid build-up in strength and high quality muscle mass, while increasing fat burning (even when not dieting). The drug does not aromatize to estrogen or reduce to DHT. For this reason there was no noted water retention or feminizing effects. Parabolan sped up the metabolism as well. Due to the high androgenic quality, a hard, ripped, and vascular look with a dramatic increase in quality muscle mass resulted for all that reported use. This profile is what made Parabolan appear to be another all-purpose steroid.

So what's the problem? It was rare to find real Parabolan. Though the real product has a distinct odor, at least 95% seen was bogus. The real product is quite toxic to kidneys, so users mostly kept usage to 4-8 weeks and drank at least an additional gallon of water daily. Due to the high degree of potential toxicity dark urine and even blood in urine can result from high, prolonged use (as can prostate enlargement due to the drug's structural similarity to DHT).

Parabolan was commonly stacked with growth hormone, thyroid, and/or Clenbuterol during diet periods for the synergistic effects. A simple stack of 20-30-mg Oxandrolone daily and 152-228-mg Parabolan weekly consistently brought excellent high quality strength and muscle mass gains while decreasing body fat.

Women should not use Parabolan due to a very high virilizing effect. But many competitive female athletes still did. Some stacked 76-mg of Parabolan every 5-8 days with 80-120 mcg of Clenbuterol and either 15-20-mg of Winstrol tabs or 10-15-mg of Oxandrolone tabs daily.

I know of one female who is suffering from most of the possible side effects: missed periods, hair loss on the scalp, serious sex-drive (you should see her on an exercise bike) and clitoral hypertrophy. Facial hair growth can also result also.

Males usually obtained excellent results with 76-mg every 2-3 days.(Though some doubled this amount unnecessarily)

*Denkell is manufacturing a similar Trenbolone product for veterinary use.

Anabolic Steroid Guide reference

In bodybuilding and also in powerlifting Parabolan has become the most desired injectable steroid compound. This is not without reason since Parabolan is truly a phenomenal, unique product.

Parabolan is a strong, androgenic steroid which also has a high ana-bolic effect. Whether a novice, hard gainer, power lifter, or pro body-builder, everyone who uses Parabolan is enthusiastic about the re-sults: a fast gain in solid, high-quality muscle mass accompanied by a considerable strength increase in the basic exercises. in addition, the regular application over a number of weeks results in a well visible increased muscle hardness over the entire body without diet-ing at the same time. Frequently the following scenario takes place: bodybuilders who use steroids and for some time have been stag-nate in their development suddenly make new progress with Parabolan. Another characteristic is that Parabolan, unlike most highlyandrogenic steroids, does not aromatize. The substance trenbolone does not convert into estrogens so that the athlete does not have to fight a higher estrogen level or feminization symptoms. Those who use Parabolan will also notice that there is no water retention in the tissue. To say it very clearly: Parbolan is the number one competition steroid. When a low fat content has been achieved by a low-calorie diet, Parabolan gives a dramatic increase in muscle hardness. In combination with a protein-rich diet it becomes espe-cially effective in this phase since Parabolan speeds up the metabo-lism and accelerates the burning of fat. The high androgenic effect prevents a possible overtraining syndrome, accelerates the regen-eration, and gives the muscles a full, vascular appearance but, at the same time, a ripped and shredded look.

Most athletes inject Parabolan at least twice a week; some bodybuilders inject 1-2 ampules per day during the last three to four weeks be-fore a competition. Normally a dosage of 228 mg/week is used, corresponding to a weekly amount of three ampules. It is our experience that good results can be achieved by injecting a 76 mg am-pule every 2-3 days. Parabolan combined with Winstrol Depot works especially well and gives the athlete a distinct gain in solid and high quality muscles together with an enormous strength gain. A very effective stack is 76 mg Parabolan every 2 days combined with 50 mg Winstrol every 2 days. Athletes who are interested in a fast mass gain often also use 30 mg Dianabol/day while those who are more interested in quality and strength like to add 25 mg+ Oxandrolone/ day. Probably the most effective Parabolan combination consists of 228 mg Parabolan/week, 200 mg Winstrol Depot/week, and 40-50 mg Oral-Turinabol/day and usually results in a drastic gain in high quality muscle mass together with a gigantic strength gain. Parabolan also seems to bring extraordinarily good results when used in combination with growth hormones.

Parabolan is not a steroid suitable for year-round treatment since it is quite toxic. The duration of intake should be limited to a maxi-mum of 8 weeks. It has been proven that Parabolan, above all, puts stress on the kidneys, rather than the liver. Athletes who have taken it in high dosages over several weeks often report an unusually dark colored urine. In extreme cases blood can be excreted through the urine, a clear sign of kidney damage. Those who use Parabolan should drink an additional gallon of fluid daily since it helps flush the kidneys. Since Parabolan does not cause water and salt retention the blood pressure rarely rises. Similar to Finaject, many 98 athletes show an aggressive attitude which is attributed to the distinct androgenic effect. It is interesting that acne and hair loss only occur rarely which might be due to the fact that the substance is not converted into dihydrotestosterone (DHT). Some athletes report nau-sea, headaches, and loss of appetite when they inject more than one ampule (76 mg) per week. Since Parabolan considerably reduces the endogenic testosterone production, the use of testosterone-stimu-lating compounds at the end of intake is suggested. In older athletes there is an increased risk that Parabolan could induce growth of the male prostate gland. We recommend that male bodybuilders, during and after a treatment with Parabolan, have their physician check their prostate to be sure it is still small in size.

Steroid novices should not (yet) use Parabolan. The same is true for women; however, there are enough female athletes who do not care since the female organism reacts to the androgenic charge and the strong anabolic effect of Parabolan with distinct gains in muscles and strength, especially from a female point of view. Thus the entire body has a harder and more athletic look. Parabolan without a doubt is an enticing product for ambitious female athletes. In the end everything depends on your personal willingness to take risks, ladies. The fact is that the standards on the national and interna-tional competition scenes in female bodybuilding have achieved lev-els which cannot be reached without the administration of strongly androgenic steroid compounds. A combination well-liked by female bodybuilders consists of 76 mg Parabolan/week, 20 mg Winstrol tablets/day, and 100 mcg Clenbuterol/day Women who do not in-ject more than one ampule of Parabolan per week and who limit the period of intake to 4-5 weeks can mostly avoid or minimize virilization symptoms. Female athletes who are overdoing it or who are sensitive to the androgenic part of trenbolone hexahydrobencylcarbonate can be confronted with some unpleasant surprises after several weeks of use: acne, androgenically-caused hair loss on the scalp, irregular menstrual cycles, missed periods, much higher libido, aggressiveness, deep voice, chtorial hypertrophy, and increased hair growth on face and on the legs. The last three side effects are mostly irreversible changes.

The chance of finding real Parabolan on the black market is around 5%. That is the reason why we take a chance and claim that only very few of you who read this book will have ever held an original Parabolan in your hand, let alone injected one. Those who have not tried the originals simply cannot take part in this discussion. As to the effect, the difference between the real French Parabolan and the fakes circulating on the black market is gigantic.

An individual package with a 76-mg/1.5 ml ampule costs between $25 and $35 on the American black market. Those who would like to purchase Parabolan on the black market should be very careful and skeptical toward the authenticity of the product offered.

Newbies Research Guide reference

The French steroid has a number of things going for it. It is a derivative of the 19-nortestosterone molecule, which is the same parent drug as Deca-Durabolin. This similarity does not end there, these two drugs act very much alike. In fact Parabolan can be mistaken for Deca on a drug test. Parabolan is a favourite to thousands of athletes. This injectable steroid has higher anabolic and lower androgenic properties than testosterone, also reminiscent to Deca. It was originally thought to be non aromatising, but it will aromatise at a high dosage in some users. Parabolan is a great pre-contest steroid. The relatively high androgenic properties can promote substantial “hardness” in a lifter who is already lean. This androgenic effect can also result in greater vascularity and fuller muscles. Parabolan has been effective on a limited calorie diet, if protein intake is still high. It need not be regarded as a cutting drug only. It can be used quite successfully to build quality muscle and strength, without the bloat of a D-Bol or Testosterones. In a stack with Anavar, Parabolan becomes part of a super strength building cycle for powerlifters who do not wish to go over their weight class limit. Side effects seen with the use of Parabolan are minimal. The drug aromatises very little if at all, so water retention and hynecomastia are rarely seen. Hepatototoxicity (liver stress) is minimal with dosages of 152 mg per week, and if used
for eight weeks or less, it exhibits very little suppression of the body’s own hormone production. Blood pressure readings are unlikely to rise due to the fact that Parabolan does not cause the blood to hold excessive electrolytes. Each person reacts differently to every drug, but the majority of athletes find this item to be safe when used properly. Parabolan has a lot to offer. It is good for pre-contest cycles. When stacked with another androgen it becomes part of an effective weight and strength cycle; but remember Parabolan used by itself will not result in dramatic weight gains. Quality muscle gains are to be expected. Parabolan comes out to look like another “all purpose” anabolic, DecaParabolan is a little more androgenic than Deca. Many are using this drug in place of Equipoise or Deca, which have become very hard to get. Parabolan is quite available on the market for about $18 an ampule. Average dosages are 76 mg to 152 mg a week.

References

Wlliam Llewellyn (2011) - Anabolics
L. Rea (2002) - Chemical Muscle Enhancement Bodybuilders Desk Reference
Anabolic Steroid Guide
Newbies Research Guide

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