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What is Helladrol?

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helladrol chemical structure

Fig 1. Helladrol Chemical Structure

Introduction to : 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol

Also known as: H-drol, Helladrol

This anabolic compound has one of the longest half-lives at nearly 13hrs. This quality makes it extremely popular because it is the factor that makes it work the way it does.

4- Chloro is considered a good   Beginners Prohormone as it has the reputation for having minimal side effects along with dry gains that are relatively easy to maintain after the cycle is completed.   4-chloro has a long half life,   which makes the dosing protocol simple for those on a busy schedule, though splitting the dose up would be more effective.

How does 4-chloro work?

4-chloro works in a very effective manner. Continue reading the rest of this article and find out why 4-Chloro works so well.

4-chloro   is a 17aa prosteroid that converts to the steroid Turinabol after interaction   with the enzyme “3b-HSD” at   a guesstimate   of about    5% percent,    although in some users this rate will be higher depending on the concentration of those enzymes in their body.
Since it has a low conversion to Turinabol, doses are often higher than other methylated steroids, raging between 50mg to 150mg per day, depending on the user.  An Athlete or Bodybuilder running a cycle containing 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol would dose it at about 50mg if taken with other Methylated orals, or as high as 150mg when taken solo.

4-chloro is already active even before conversion to a steroid via enzymatic activity, specifically by the aforementioned “3b-HSD” enzyme, it has some   very desirable benefits without needing conversion.  Before”4-chloro's conversion to Turinabol via enzyme “3b-HSD”,  when it travels the body only as 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol, and it attaches to Androgen Receptors in muscles cells, it's actions are as potent as Testosterone,    and it is significantly less androgenic.

User of 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol , report that their gains are very dry, and maybe even more so than with Turinabol itself.  Bloat or water retention has rarely been reported as it does not inhibit the enzyme 11-beta hydroxylase as most methyls do which leads to sodium retention and water bloat.

When you look at the structure: the 4-chloro group in 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol  has   no problems with pro-gestational effects, and it does not interact with aromatase. Even when it converts to other hormones it produces only inactive 4-chloro-DHT metabolites which do not cause much in the way of side effects from androgenic activity. This is good news  for those prone to hair loss, as this is one of the most commonly reported androgenic side effects. Hair loss is not the only problem mitigated as the more serious side-effects of prostate problems are reduced as well, when compared to something like DHT.

In light of all of the actions described above, users of 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol  often report that Libido is  increased and signs of HTPA shutdown are normally minimal, to non existent during short cycles at mild dosages.

As with most of the prosteroids now in use today, the gains on 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol  will be lean and dry, with most users reporting seeing gains of around 8lbs during a 5 week cycle, with noticeable fat loss in the process.

Possible side effects

No true anabolic androgenic product ever comes without side effects.   When in this article we mention that possibility of side-effects being low, we mean as compared to Testosterone or other anabolic androgenic products in use already.  H-drol will still cause a few possible side-effects that increase in possibility of occurrence along with intensity, as the daily dose gets higher.

Possible side effects of 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol  usage are:

1) Loss of Libido in some higher dosages (HCGenerate can help with this area)

2) Hair Thinning (Really for those prone to MPB (Male Pattern Baldness), N2 Shampoo can be used)

3) Sore Joints (Skeletal balm, omega 3, and MSM are helpful)

4) Back Pumps (Stretching, electrolytes, Taurine and potassium can relieve these symptoms)

5) Acne (Typically on arms/back etc, 1g-2g daily of vitamin b5 is helpful in this area, many Bodybuilders use the tanning bed a couple of times per week)

6) Increased aggression, migraines, shrunken testicles, sleep pattern alteration especialy if dosed late at night, can all take place, as can increased bad cholesterol as methyls damage the liver.  N2Guard and HCGenerate are commonly used on prohormone and prosteroid cycles.

How does 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol gain a reputation among Bodybuilders and Athletes for lowering bodyfat?

4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol  changes the androgen/ estrogen ratio in favor of an androgenic environment.  This makes the body find it hard to store fat at a cellular level, and instead surplus calories are most likely to be used to build muscle mass, as the androgen receptor is activated by protein synthesis and nitrogen retention.  The androgenic side effects also make the user more masculine, and less prone to hold bodyfat.

One of the reasons 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol is a desired addition in any cycle stack, gaining it a reputation for helping the whole cycle work more efficiently,  is that it up-regulates  the AR(Androgen Receptor), and antagonizes the catabolic actions of cortisol.  Sustained high Cortisol levels are an enemy of the Bodybuilder because it slows down lipolysis(fat burning), and decreases free testosterone levels.

4-Chloro doesn’t convert to DHT(dehydrotestosterone)   and so it does not get affected the same way DHT does by adipose tissue. This allows   4-chloro to be able to take effect, unhindered by any effects of deactivation or conversion, and it produces mild fat loss especially getting close to week 4 when AR sites have had time to up-regulate and serum blood levels will be at there highest and taking full effects.

Another strong benefit while using 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol is that stamina should be  increased as well as  muscle recovery, which would allow for more consistent workouts, and better endurance, which also means more calories are burned. Red blood cells increase in volume and the body can carry more oxygen leading to better cardio performance.

Cycle length and stacking

A common cycle length of 4 -6 weeks is what most users generally run. Most first time users dose in the range of 75mg a day, and advanced users towards 120mg.

Make no mistake, as it is a methylated oral that can damage your liver with abuse, when using it in a cycle, the dosage should be lowered to around 30mg to 60mg specially when stacking it with other methylated compound and anabolic steroids like Anavar or Dianabol.

There are cycles where 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol  can be used with  Formestane, Materone, Epistane or even Winstrol, leading to very dry lean gains, and since 4-chloro is so versatile, it can be used in a bulking cycle using Testosterone as a base, or stacked with a non-methyl like 13-ethyl for the same bulking pusposes.

Some users have stacked 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol   with 11-oxo.  This, however, is likely to cause some issues as 11-oxo in the presence of methylated androgens can sometimes negatively affect aldosterone and lead to water retention.

There are other 4-chloro compounds on the market that are some time used the same way as 4-chloro-17a-methyl-androst-1,4-diene-3b,17b-diol , one of those well known ones is known by nomeclature: -4-chloro-17a-methyl-androst-4-en-17β-ol-3-one- , this is another 4-Chloro that is also Methylated much the same way as the 4-chloro anabolic in this article.   -4-chloro-17a-methyl-androst-4-en-17β-ol-3-one-  can be used for both bulking and cutting much the same way H-drol can.  This is why you can find it in botu cutting and bulking cycles.  You can find -4-chloro-17a-methyl-androst-4-en-17β-ol-3-one-  in a a full cycle stack in the product called OxandroVar, where it works with Epistane, Hexadrone and other prosteroids, prohormones and analougues to create a very strong cutting cycle.   As mentioned earlier, the versatility of the 4-chloro compounds allows for -4-chloro-17a-methyl-androst-4-en-17β-ol-3-one-  to even be used in a bulking formula like DianaBulk, where it works along side “wet” bulking anabolic androgenic hormones like DYMETHAZINE (-2,17-dimethyl-5-androstan-17-ol-3,3'-azine-).  This 4-chloro compound really adds synergy to the bulking stack in DianaBulk.


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Russian Star is an industry leader in peptide design and development. He is a fitness mentor with a Masters degree in molecular chemistry, he's working on his PhD in biochemistry.

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