Lower Sex Hormone-Binding Globulin (SHBG) for Higher Free Testosterone: Strategies During an AAS Cycle

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Boost Free Testosterone: 5 Proven Ways to Reduce SHBG on an AAS Cycle
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Five ways to reduce sex hormone-binding globulin (SHBG) during an androgenic anabolic steroid cycle.

Below are listed the drugs that can help reduce SHBG.


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How to Reduce SHBG?

Sex hormone-binding globulin (SHBG) is a glycoprotein with a high affinity for binding to 17 beta-hydroxysteroid hormones, such as testosterone and estradiol.

It is likely synthesized in the liver, and its plasma concentration is regulated, among other factors, by the balance of androgens/estrogens, thyroid hormones, insulin, and dietary factors.

SHBG is involved in the transport of sex hormones in plasma, and its concentration is a major factor regulating their distribution between protein-bound and free states. Its detailed role in delivering hormones to target tissues is still unclear.

The plasma concentration of SHBG is affected by a number of different diseases, with high values found in hyperthyroidism, hypogonadism, androgen insensitivity, and liver cirrhosis in men.

First Method

The first method is the inclusion of drostanolone in the AAS cycle. As a substitute for drostanolone (also known as Masteron), mesterolone (Proviron) can be used—both of these substances are essentially the same.

Thus, including Masteron or Proviron in your AAS cycle significantly increases the amount of free testosterone.

Second Method

Any reduction in estradiol levels leads to an increase in free testosterone levels, so instead of drostanolone/Proviron, one of the aromatase inhibitors can be used, for example.

However, the effectiveness of the two anabolic steroids mentioned in the first method is still higher.

Third Method

The third method is the use of small (about 20 mg per day) doses of oral stanozolol. The oral form of this anabolic steroid is more preferable in this case.

The duration of using oral stanozolol is 7-10 days every 4-6 weeks of the AAS cycle.

Fourth Method

The fourth method involves the periodic use of insulin in small doses. 8-10 IU once or twice a week will be sufficient.

Fifth Method

The fifth method is about what to remove rather than add. If you are truly concerned about your free testosterone levels, do not use high (50 mcg per day or more) doses of triiodothyronine. And you should forget about thyroxine altogether.

Additional Measures

From "hard chemistry" we move to "softer" methods—vitamins and minerals.

  1. Vitamin D taken daily, the "sunshine vitamin," will reduce the amount of testosterone that is converted to estradiol, thus lowering the amount of SHBG.
  2. Boron will also reduce SHBG levels. The same goes for magnesium (500-1000 mg per day).
  3. Zinc 10-15 mg per day will increase the amount of albumin. Zinc can be taken as part of a ZMA supplement or on its own.
Ivan Vlasov
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Fitness, lifestyle, health — three main directions dedicated to this internet resource. I simply love what I do. That's why I created the 2GYM project. Learn more
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  • This commment is unpublished.
    Konstantin Sulima · 2 years ago
    If weight gain is happening at a rate of 1-2 kg per week, why reduce SHBG, which precisely delivers testosterone to target cells? Without it, weight gain during the cycle could stop altogether. These intellectual morons insist on lowering SHBG. Why reduce it to harm oneself?
    • This commment is unpublished.
      Ivan Vlasov · 2 years ago
      Reasons, rationale, prerequisites, and motives for reducing SHBG are primarily not considered in this publication, including the question in the context of muscle mass gain, which is not always the primary or sole goal pursued by fitness and bodybuilding enthusiasts.

      This publication describes methods of reducing SHBG if such a goal is already set. Some may choose to reduce it, while others may not; in any case, we refrain from passing judgment on others' actions.

      Quote from the article: "The concentration of SHBG in plasma is influenced by various diseases; high values are found in hyperthyroidism, hypogonadism, and androgen insensitivity syndrome, among others."

      Lowering SHBG does not mean reducing it to zero. Rather, the discussion revolves around optimization.

      Regarding "killing oneself": In your previous comment, you mentioned "What about Masteron," which is indeed mentioned in the article. Many athletes incorporate Masteron into their regimen without primarily aiming to lower SHBG. I am not aware of cases where people have "killed themselves" as a result of using Masteron or 20 mg of stanozolol, especially in the absence of any serious contraindications to using these medications.
  • This commment is unpublished.
    Konstantin Sulima · 2 years ago
    You forgot injectable Masteron; it's not as aggressive as 17-alpha-alkylated Stanozolol at 10 mg per day, and there are plenty of other oral meds that lower SHBG besides Stanozolol. I think all 17-alpha-alkylates lower it, even Oxymetholone at 25 mg per day.
    • This commment is unpublished.
      Ivan Vlasov · 2 years ago
      Masteron, which is drostanolone, is the very first in the list. Thank you for the information.
  • This commment is unpublished.
    iurii · 2 years ago
    How long and in what dosage should Masteron (Proviron) be used?
    • This commment is unpublished.
      Yuri Bombela · 2 years ago
      If drostanolone enanthate - 200 mg once every 5-7 days. Drostanolone propionate 100 mg once every 2-3 days.
  • This commment is unpublished.
    bigrasim · 2 years ago
    How effective is the use of insulin in suppressing SHBG? Is this due to its gonadotropic properties?
    • This commment is unpublished.
      Yuri Bombela · 2 years ago
      Well, that's a bit of a complex question :) Actually, it's not widely known, but it's understood that in individuals, especially women, who have high insulin levels, SHBG levels are lower in the blood. Insulin injections in healthy individuals also reduce SHBG levels, but the exact mechanism is still unknown. Here's a study on this, for example: link
  • This commment is unpublished.
    Юрий · 2 years ago
    Good evening, can you explain to me where all these dosages come from? You write, drostanolone enanthate - 200 mg every 5-7 days, drostanolone propionate 100 mg every 2-3 days. Where do these numbers and days come from?!
    • This commment is unpublished.
      Yuri Bombela · 2 years ago
      For each medication, a dosage is defined (single, therapeutic, etc.). The frequency of injections is calculated based on the medication's half-life.
      • This commment is unpublished.
        Yuri · 2 years ago
        There are veterinary drugs without therapeutic indications for humans. How do you handle this? How do you calculate the dosage for humans without relying on others like "Vasya said so" or following what everyone else does? Thank you for explaining; I want to know because many people talk and act this way.
        • This commment is unpublished.
          Yuri Bombela · 2 years ago
          Doses are often taken from thin air. Not always, but usually. Okay, trenbolone and testosterone have been researched quite well, so you can say something specific about them. The problem lies with the rest.

          What can you say when, to this day, anabolic steroids are the only (!) medicinal substances for which a lethal dose hasn't been established? No one simply knows. In experiments, people have taken up to a hundred grams (!) of testosterone per day (!!!) — and nothing happened.

          Veterinary dosages are also mostly guesswork, based on experience. Sergei Yanko (he used to breed birds) talked about experiments with methandrostenolone. At 5 mg, everyone died; at 1 mg, more than half survived :)

          Medicine often operates in a similar way. Take oxymetholone, for example: 350-500 mg per day is a standard dose for treating anemia. But where did this dose come from? Who takes it at such levels? Nandrolone — despite being well-studied, no one can specify a safe dosage; new information keeps emerging all the time.
          • This commment is unpublished.
            Yuri · 2 years ago
            Taking dosages of boldenone isn't ideal either. Even among identical twins, hormone tests can vary significantly. I'm not keen on relying on anecdotal advice, because health is paramount. Understanding that AAS isn't a sweet treat, I want to minimize harm to my body. Some medications are prescribed based on body weight, age, and other factors. How can I find the right dosage, what should I focus on?
            • This commment is unpublished.
              Yuri Bombela · 2 years ago
              You need to find your own dosage. Standardized dosages for all drugs have long been determined through practical experience. I present them in my book. If you want to delve deeper into this, read Harkewicz's pharmacology textbook.
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