SERMs for Bodybuilders: How to Get the Most Out of Them After a SARM or Steroid Cycle

Selective Estrogen Receptor Modulators, or SERMs, can help you mitigate estrogen-related issues in bodybuilders, such as gynecomastia. These compounds, like Tamoxifen and Clomiphene, are valuable tools for your post-cycle therapy to support natural testosterone production.

Excessive or improper use can lead to adverse effects, including mood swings and blood clotting risks. In this article, we’ll explore the world of SERMs for bodybuilding, uncovering their potential benefits, discussing possible side effects, and, most importantly, providing insights on how to use them safely.

What are SERMs?

SERMs, control estrogen levels, which are crucial for managing side effects like gynecomastia. By binding to estrogen receptors, SERMs prevent the harmful effects of excess estrogen without suppressing overall muscle gains. They’re a strategic asset in the pursuit of a chiselled physique, aiding bodybuilders in achieving their goals while maintaining hormonal equilibrium.

How Do SERMs Work for Bodybuilding

How Do SERMs Work for Bodybuilding

SERMs work by binding to estrogen receptors, blocking estrogen’s effects. It prevents gynecomastia, a common issue in bodybuilders due to excess estrogen. SERMs are used post-cycle to restore natural testosterone production. By occupying estrogen receptors in the chest, SERMs keep those muscles looking lean and chiselled.


SERMs, like Tamoxifen and Clomiphene, assist bodybuilders in regulating estrogen levels. These compounds counteract the potential side effects of anabolic steroid use, such as gynecomastia. During PCT, SERMs help restore natural testosterone production, aiding in maintaining hard-earned gains and minimizing the risk of unwanted estrogenic effects. PCT use after SERMs cycle.

Different Types of SERMs and Their Effects on the Body

There are five different types of the most well-known SERMs and their effects on the body are discussed below:

1. Tamoxifen

Tamoxifen is commonly used in the treatment and prevention of breast cancer. Nolvadex, an estrogen-blocking antagonist, is a vital prescription for women with hormone receptor-positive breast cancer. It combats estrogen’s effects effectively.

2. Raloxifene

Raloxifene is primarily used in the treatment and prevention of osteoporosis. It also has applications in the prevention of breast cancer in high-risk individuals. Evista acts as an estrogen agonist in bone tissue, promoting bone density while working as an antagonist in breast tissue.

3. Clomiphene

Clomiphene is used to induce ovulation in women with infertility issues. It works by stimulating the release of hormones that trigger the release of eggs from the ovaries. Clomid is often used in the treatment of female infertility.

4. Bazedoxifene

Bazedoxifene is sometimes used in combination with conjugated estrogens to relieve menopausal symptoms in postmenopausal women. This combination therapy can alleviate hot flashes and other symptoms.

5. Lasofoxifene

Like Raloxifene, lasofoxifene is used in the treatment and prevention of osteoporosis. It also has applications in reducing the risk of invasive breast cancer in postmenopausal women with osteoporosis.

How to Use SERMs For Athletic Performance and Bodybuilding?

Using SERMs for bodybuilding is a valuable strategy. If gynecomastia is a concern due to anabolic steroid use, Tamoxifen is commonly used. Typically, a daily dosage of 5-20 mg is effective. SERMs are the best solution for testosterone suppression after a SARMs cycle.

For post-cycle therapy (PCT), Clomiphene (Clomid) can stimulate testosterone production. A standard PCT protocol might involve 20 mg daily for three to four weeks. Ensure you follow a well-structured plan, considering your unique body and goals.

SERMs Cycle and Dosage

For Beginner Bodybuilders,

  • Dosage: 5mg
  • Cycle: 6 Weeks

For Advanced Bodybuilders

  • Dosage: 20 mg
  • Cycle: 10 Weeks

Five Essential Health Benefits of SERMs

Five Essential Health Benefits of SERMs

5 benefits of SERMs for bodybuilders are given below:

1. Hormone Regulation

One of the primary benefits of SERMs is their ability to regulate hormone levels in the body. SERMs can selectively bind to estrogen receptors in different tissues, providing hormonal balance. In conditions requiring hormonal control, like breast cancer treatment or menopause therapy, this holds exceptional value. It’s a vital tool for managing hormone fluctuations effectively.

2. Gynecomastia Prevention

SERMs act as a shield against gynecomastia, a common issue for bodybuilders. They inhibit estrogen activity in the chest area, preventing the development of breast tissue.

3. Bone Health

Postmenopausal women often face the challenge of decreased bone density, leading to conditions like osteoporosis. SERMs not only help reduce the risk of breast cancer but also improve bone health. By acting as estrogen agonists in bone tissue, SERMs enhance bone mineral density, making them a vital tool in the fight against osteoporosis.

4. Post-Cycle Recovery

Bodybuilders often go through cycles of anabolic steroid use. SERMs play a pivotal role in post-cycle therapy, aiding in the restoration of hormonal balance.

5. Improved Libido

Maintaining a healthy hormonal balance with SERMs can positively impact libido and sexual health, a benefit bodybuilders value.

Five Common Side Effects of SERMs

Here we list five common side effects of SERMs:

1. Hot Flashes

According to “Selective Estrogen Receptor Modulators by Ki-Chan An” Hot flashes are a common side effect of SERMs, and understanding their underlying mechanisms can provide valuable insights. SERMs interact with estrogen receptors, sometimes causing a temporary hormonal imbalance. This disruption triggers hot flashes, making patients experience sudden warmth, sweating, and sometimes chills.

2. Blood Clot Risk

SERMs can affect the coagulation cascade by influencing clotting factors. This shift in the balance between clot formation and dissolution may lead to a higher risk of clot formation, posing a concern for those taking these medications.

3. Mood Swings

According to “Aromatase Inhibitors and Mood Disturbances: a Case Study by Xiomara Rocha-Cadman” The reasons behind this side effect is traced to the intricate connection between estrogen and neurotransmitters in the brain. By modifying estrogen signalling, SERMs can cause mood swings and even mild to moderate mood disturbances in certain patients.

4. Uterine Changes

According to “The endometrial effects of SERMs by A Cano” SERMs can induce uterine changes, which may include endometrial thickening and, in some cases, an increased risk of endometrial cancer. SERMs are the versatile key to unlocking estrogen’s power in different tissues. They play both sides, activating and blocking, in a finely tuned hormonal dance.

5. Visual Disturbances

Some patients taking SERMs may experience visual disturbances, such as blurred vision or even retinopathy. The reasons behind these side effects are still being researched, but they may relate to the impact of SERMs on ocular blood vessels and retinal function. Vigilance in monitoring eye health is vital in these cases.


Here is a comparison table of SARMs vs SERMs are shown below:

FeaturesSelective Androgen Receptor ModulatorsSelective Estrogen Receptor Modulators
PurposeEnhance muscle growth and physical performance.Treat various conditions related to estrogen receptors.
Target ReceptorsAndrogen receptors (muscle and bone tissue).Estrogen receptors in different tissues.
Medical UsesSome potential medical applications include muscle wasting conditions and osteoporosis.Established medical uses, e.g., breast cancer treatment and osteoporosis.
Mechanism of ActionSelectively stimulate androgen receptors in specific tissues.Selectively modulate estrogen receptor activity in different tissues.
Common Selective Androgen Receptor ModulatorsOstarine, Ligandrol, Andarine, Testolone, Cardarine.Tamoxifen, Raloxifene, Clomiphene, Bazedoxifene.
Sports & BodybuildingPopular for muscle growth and enhanced physical performance.It is not typically used for sports or bodybuilding purposes.
Side EffectsIt can cause side effects, including testosterone suppression, liver toxicity, and cardiovascular issues.It can have side effects like hot flashes, blood clots, and changes in the uterine lining.

Want to learn more about the differences between SARM & SERM? Read this: SERMs Vs SARM

How to Use SERMs Safely and Effectively?

Begin by administering a minimal dosage like 10 mg, allowing for a gradual increase over time to gauge your body’s reaction and adaptability. Employ a cyclic strategy with SERMs, lasting 6-10 weeks, ensuring vital rest periods. Your body deserves these intervals for recovery.

When Should You Use SERMs?

A primary application of SERMs in bodybuilding is post-cycle therapy (PCT), a strategy employed to mitigate the adverse effects of SARMs, including suppressed testosterone production. SERMs play a crucial role in restoring natural testosterone levels promoting optimal hormonal balance.

PCT is essential after SARMs or anabolic steroids cycle to avoid hormonal imbalances. SERMs like Tamoxifen and Clomiphene can be essential to your recovery phase.



Can SERMs Increase Muscle Mass?

Yes, SERMs have the potential to increase lean muscle mass. SERMs work by blocking estrogen receptors in certain tissues, which can lead to an increase in testosterone levels. Testosterone is a hormone essential for muscle growth. In the right context, SERMs can boost lean muscle growth during post-cycle therapy and low testosterone cases. Moreover, SERMs can reduce body fat significantly while increasing muscle size.

What do SERMs Do to Men?

SERMs are primarily used to prevent or reduce gynecomastia, a condition characterized by the enlargement of male breast tissue. Additionally, SERMs are known to promote an increase in the body’s testosterone levels, which is essential for maintaining muscle mass, bone density, and overall vitality. These medications work by selectively binding to estrogen receptors, thus blocking the harmful effects of estrogen in these aspects.

Do SERMs Lower Testosterone?

No, SERMs do not decrease testosterone. In fact, they can boost testosterone, especially in men with low levels due to hypogonadism. Research supports the efficacy of SERMs for this purpose. They offer a well-tolerated alternative to testosterone replacement therapy, with some associated risks.

Do SERMs Stop Gyno?

SERMs can help stop Gynecomastia, commonly known as “gyno.” Gyno is the development of male breast tissue, often caused by an imbalance of hormones, particularly estrogen. SERMs, like Tamoxifen or Raloxifene, work by binding to estrogen receptors in the breast tissue, blocking estrogen’s effects and preventing further growth. They are effective in reducing the size of existing breast tissue.

Can you Take SERMs Long Term?

No, it would be best if you didn’t take SERMs long-term. Prolonged use of SERMs can lead to adverse side effects and potential health risks. According to “Long-term toxicities of SERMs and antiaromatase agents by Joanne E Mortimer” These medications are typically designed for short-term use due to their impact on hormone regulation. Using SERMs over an extended period may disrupt your body’s natural hormonal balance, increasing the risk of complications.

What are the Best SERMs for Men?

The best SERMs for men are Nolvadex and Clomid. Tamoxifen is commonly used to treat breast cancer but can also help men with gynecomastia, a condition characterized by enlarged breast tissue. Clomiphene, on the other hand, is often prescribed to men with low testosterone levels, as it stimulates the body’s production of testosterone. These medications are effective in addressing hormonal imbalances and related issues in men.

Final Thoughts

Selective Estrogen Receptor Modulators can mitigate estrogen-related side effects of anabolic steroid use, preserving gains and overall health. Bodybuilders should consult healthcare professionals for tailored advice, as misuse can lead to complications.

To harness the benefits of SERMs, understanding their mechanism of action and potential side effects is crucial. These compounds are not a shortcut but a tool for a balanced approach to bodybuilding. Ultimately, the journey toward achieving your fitness goals should prioritize safety, well-being, and adherence to legal and ethical standards.


  • Tina Joseph, Lawrence M Gibbs, Kim Pham (January 7, 2022) Are SERMs safe and effective for the treatment of hypogonadism in men?
  • Alex K. Bonnecaze, Thomas O’Connor, and Cynthia A. Burns (May 4, 2021) Harm Reduction in Male Patients Actively Using Anabolic Androgenic Steroids (AAS) and Performance-Enhancing Drugs (PEDs): a Review
  • Luigi Gennari, Daniela Merlotti, and Ranuccio Nuti (February 2, 2010) Selective estrogen receptor modulator (SERM) for the treatment of osteoporosis in postmenopausal women: focus on lasofoxifene
  • Hitisha K Patel, Teeru Bihani (Dec 28, 2017) Selective estrogen receptor modulators (SERMs) and selective estrogen receptor degraders (SERDs) in cancer treatment
  • Dali Tong (April 5, 2022) Selective estrogen receptor modulators contribute to prostate cancer treatment by regulating the tumor immune microenvironment
  • Philipp Y Maximov, Theresa M Lee, and V. Craig Jordan (May 22, 2013) The Discovery and Development of Selective Estrogen Receptor Modulators (SERMs) for Clinical Practice
  • Jane Y. Xu, Michele A. O’Connell, Lauren Notini, Ada S. Cheung, Sav Zwickl, and Ken C. Pang (June 18, 2021) Selective Estrogen Receptor Modulators: A Potential Option For Non-Binary Gender-Affirming Hormonal Care?

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