Anabolic steroids and SARMs are two of the most frequently discussed compounds in bodybuilding, especially when the conversation turns to muscle growth, strength, and performance enhancement. Both act through androgen receptors and can influence muscle development, but their chemical structures, tissue responses, and available safety evidence are different. Traditional anabolic steroids have a long history of medical and nonmedical use, while selective androgen receptor modulators (SARMs) were developed to produce anabolic effects with potentially fewer unwanted androgenic effects in other tissues.
That sounds promising, but there’s a problem with how SARMs are often described in bodybuilding communities. Many people assume they offer most of the muscle-building benefits of steroids without the same health risks. Current research doesn’t support such a simple comparison. SARMs may be more tissue-selective, but that doesn’t automatically make them safe, particularly when it comes to testosterone suppression, liver health, cardiovascular effects, and long-term use.
More details: https://aasvault.is/anabolic-steroids-vs-sarms-what-are-the-major-differences/
How Do Anabolic Steroids and SARMs Actually Work?
Both anabolic steroids and SARMs interact with androgen receptors, proteins found in muscle, bone, reproductive tissues, and other parts of the body. When activated, these receptors influence biological processes involved in muscle development, protein metabolism, and androgen-dependent functions.
Traditional anabolic-androgenic steroids include testosterone and several synthetic derivatives. Their effects depend on the particular compound, its metabolism, its interactions with androgen receptors, and whether it can be converted into other active hormones. This explains why different anabolic steroids have different effects on muscle, skin, reproductive tissues, and other organs.
SARMs were developed with a different objective. Researchers wanted compounds capable of stimulating anabolic activity in muscle and bone while limiting unwanted androgenic effects in tissues such as the prostate. Their tissue-selective activity involves differences in receptor signaling, gene regulation, and other biological processes rather than simply binding to androgen receptors in muscle alone.
However, androgen receptors are present throughout the body. Tissue selectivity is relative, not absolute, and SARMs can still affect hormonal regulation and organs outside skeletal muscle.
Anabolic Steroids vs SARMs: What Are the Main Differences?
The biggest difference lies in the compounds’ pharmacology and the amount of evidence available about their effects.
Traditional anabolic steroids have been studied for decades, and some have legitimate medical applications. Certain testosterone formulations, for example, are approved for appropriately diagnosed testosterone deficiency. However, medically prescribed hormone replacement is very different from supraphysiological steroid exposure intended to increase bodybuilding performance.
SARMs are a newer group of investigational compounds. Researchers have studied agents such as enobosarm and ligandrol for conditions involving muscle wasting, frailty, and reduced physical function. Some clinical trials have demonstrated improvements in lean body mass, but that hasn’t consistently translated into improved strength or mobility.
Another major difference is regulatory approval. As of November 2026, no SARM is FDA-approved for human use, while certain anabolic-androgenic steroids remain available as regulated prescription medications for specific conditions.
Which Builds More Muscle: Steroids or SARMs?
Muscle growth is usually the first question bodybuilders ask when comparing these compounds. Traditional anabolic steroids generally have stronger evidence for substantial increases in muscle mass, especially when testosterone has been studied at supraphysiological concentrations under controlled conditions.
Research has demonstrated that testosterone exposure can increase fat-free mass, muscle size, and strength, particularly when combined with resistance training. However, results vary considerably across compounds, and increased androgen exposure also raises the possibility of adverse effects.
SARMs have demonstrated anabolic activity in clinical studies, but the findings require careful interpretation. A 2024 systematic review examining randomized controlled trials found improvements in several measures of body composition and physical performance. Most participants were middle-aged or older adults, rather than experienced bodybuilders attempting to maximize hypertrophy.
A more recent critical review also highlighted that increases in lean body mass do not consistently translate into meaningful functional improvements. This is an important distinction because gaining measurable lean tissue and developing greater gym performance are not necessarily the same outcome.
There is also a lack of high-quality head-to-head clinical research comparing commonly used bodybuilding doses of anabolic steroids and SARMs. As a result, claims that one specific SARM produces a particular percentage of the gains associated with testosterone aren’t scientifically established.
Are SARMs Really More Selective?
Tissue selectivity is the central concept behind SARMs, and it’s also one of the most misunderstood.
Researchers designed these compounds to influence androgen receptor activity differently across tissues. The objective was to preserve anabolic effects in muscle and bone while reducing stimulation of tissues where androgenic activity might be undesirable.
This has potential medical value, particularly for conditions involving muscle loss and reduced physical function. However, selectivity observed in laboratory experiments or short clinical trials doesn’t guarantee protection from adverse effects during prolonged exposure.
The liver, cardiovascular system, and reproductive endocrine system can still be affected. Some SARMs have been associated with reduced HDL cholesterol, changes in testosterone concentrations, and elevated liver enzymes.
So while SARMs have an interesting pharmacological design, describing them as working exclusively in muscle and bone would be inaccurate.
Which Has More Side Effects?
Anabolic steroids have a well-documented adverse-effect profile, particularly when used nonmedically at supraphysiological concentrations. Potential complications include acne, hair loss in susceptible individuals, unfavorable cholesterol changes, elevated blood pressure, and suppression of natural testosterone production.
Long-term anabolic-steroid exposure has also been associated with cardiac remodeling, impaired heart function, and reproductive complications. Certain oral anabolic steroids carry additional liver-related risks because of their chemical structure.
SARMs are sometimes marketed as a gentler alternative, but that comparison can be misleading. The FDA has warned that SARM-containing products may be associated with serious liver injury, cardiovascular complications, sexual dysfunction, and other adverse effects.
Some clinical studies have reported relatively limited adverse effects during short treatment periods. However, these findings cannot establish long-term safety, especially when individuals use higher nonmedical doses, combine several compounds, or consume products of uncertain composition.
The most accurate conclusion is that traditional steroids have better-characterized risks, while SARMs have both documented risks and substantial unanswered safety questions.
Do Both Suppress Natural Testosterone?
Yes, hormonal suppression is an important concern with both anabolic steroids and SARMs.
The body’s natural testosterone production is regulated through the hypothalamic-pituitary-testicular axis. When androgenic compounds are introduced externally, hormonal feedback can reduce the signals responsible for stimulating testosterone and sperm production.
Anabolic steroids can cause substantial suppression, particularly with prolonged or high-dose exposure. This may contribute to reduced fertility, testicular changes, sexual dysfunction, and symptoms associated with low testosterone after discontinuation.
SARMs can also disrupt hormonal regulation. Clinical research involving certain SARMs has documented reductions in testosterone and other hormone-related measurements.
The degree of suppression depends on the compound, exposure, individual physiology, and other factors. It would therefore be misleading to claim that all SARMs cause only mild suppression or that hormone recovery is guaranteed after stopping them.
What About Liver Health?
Liver toxicity is another major concern in the anabolic steroids versus SARMs discussion.
Certain oral anabolic steroids, particularly 17-alpha-alkylated compounds, are associated with increased liver-related risks. These can include abnormal liver enzymes, cholestatic injury, and more serious complications.
However, not every anabolic steroid has an identical liver-risk profile. Chemical structure and route of administration matter.
SARMs were initially developed with the hope of providing useful anabolic effects while avoiding some of the limitations of traditional androgen treatments. Despite this, cases of clinically significant liver injury have been documented with SARM-containing products.
The National Institutes of Health’s LiverTox resource identifies severe cholestatic jaundice among the reported complications associated with SARMs.
For bodybuilders, this means switching from an oral steroid to an oral SARM does not automatically eliminate concerns about liver health.
Cardiovascular Risks: Which Is Safer for the Heart?
Cardiovascular health deserves particular attention because improvements in muscle size and gym performance don’t necessarily reflect what is happening inside the body.
Nonmedical anabolic-steroid use has been associated with unfavorable lipid profiles, elevated blood pressure, cardiac structural changes, and other cardiovascular complications. These concerns become particularly relevant with prolonged or repeated exposure.
The long-term cardiovascular effects of SARMs are less thoroughly understood. Some clinical studies have documented reductions in HDL cholesterol, while regulatory agencies have warned about potential heart attack and stroke risks associated with SARM-containing products.
However, there is insufficient evidence to reliably calculate and compare the long-term cardiovascular risk of every anabolic steroid and SARM under typical bodybuilding conditions.
The absence of long-term research should not be interpreted as evidence that SARMs are safer for the heart.
Are SARMs Safer for Beginners?
One common argument in bodybuilding forums is that SARMs are better suited for beginners because they are less androgenic than traditional steroids.
This reasoning overlooks several important issues.
First, there is no established nonmedical SARM dose that can be considered universally safe. Second, different SARMs have different pharmacological characteristics, and their risks cannot be generalized across the entire category. Third, products sold online may not contain exactly what their labels claim.
Even in clinical trials, where compounds are manufactured under controlled conditions, researchers continue investigating safety and efficacy. The situation becomes more uncertain with unregulated products marketed for physique enhancement.
For someone new to resistance training, meaningful muscle development can be achieved through progressive overload, appropriate nutrition, sufficient sleep, and consistent programming without introducing experimental androgen receptor modulators.
What Happens When People Combine SARMs and Steroids?
Stacking is another common topic in bodybuilding communities. Some users combine different anabolic steroids, while others add SARMs to existing steroid regimens in the belief that different compounds will produce complementary effects.
However, combining androgen-active substances can increase total pharmacological exposure and make adverse effects harder to identify.
Hormonal suppression, unfavorable lipid changes, liver-related complications, and cardiovascular concerns may become more difficult to assess when multiple compounds are involved.
There is also insufficient controlled human evidence establishing the safety or long-term effectiveness of common bodybuilding stacks involving SARMs and anabolic steroids.
Claims about synergistic muscle growth should not be treated as proof that combination use offers a favorable risk-benefit profile.
Are Anabolic Steroids and SARMs Legal?
The legal distinction between these substances is important, particularly in the United States.
Anabolic steroids covered by the Controlled Substances Act are generally classified as Schedule III controlled substances. Certain formulations are legally available with valid prescriptions for approved medical indications, while unauthorized possession and distribution can carry legal consequences.
SARMs have a different regulatory status. They are not FDA-approved for human use and cannot legally be marketed in the United States as dietary supplements or approved medicines. Products labelled “research use only” are not automatically exempt from drug regulations when marketed for human consumption.
Their precise controlled-substance status is not identical to that of traditional anabolic steroids, and legal requirements can vary by compound and jurisdiction.
In competitive sports, both anabolic steroids and SARMs are prohibited under the World Anti-Doping Agency’s anabolic-agent rules. This applies to athletes participating in organizations governed by the World Anti-Doping Code.
Frequently Asked Questions
Are SARMs the same as anabolic steroids?
No. Both act through androgen receptors, but they differ in chemical structure, tissue-selective activity, clinical development, and regulatory status. Some SARMs are nonsteroidal compounds designed to produce anabolic effects with reduced androgenic activity in certain tissues.
Do anabolic steroids build more muscle than SARMs?
Traditional anabolic steroids have stronger clinical evidence for substantial increases in muscle mass under certain conditions. SARMs have also demonstrated anabolic effects, but direct comparisons in experienced bodybuilders are limited.
Do SARMs have fewer side effects?
Some SARMs were designed to reduce particular androgenic effects, but that doesn’t establish a better overall safety profile. Liver injury, hormonal suppression, cardiovascular concerns, and other adverse effects have been reported.
Can SARMs suppress testosterone?
Yes. Certain SARMs have been shown to lower testosterone and affect hormonal regulation. The degree of suppression varies by compound and exposure.
Are SARMs safer for the liver?
Not necessarily. Serious liver injuries have been reported with SARM-containing products, and long-term safety evidence remains limited.
Are SARMs legal in the United States?
SARMs are not FDA-approved medicines and cannot legally be marketed as dietary supplements or drugs for human use. Their controlled-substance status differs from that of many traditional anabolic steroids.
Are SARMs allowed in drug-tested bodybuilding?
No. SARMs and anabolic steroids are prohibited under applicable WADA anabolic-agent rules, including outside competition.
Final Thoughts: Anabolic Steroids vs SARMs
The main difference between anabolic steroids and SARMs is not simply that one builds more muscle while the other causes fewer side effects. Their pharmacology, research history, and safety evidence are different, and those distinctions matter.
Traditional anabolic steroids have demonstrated substantial muscle-building effects, but nonmedical use carries well-established hormonal, cardiovascular, reproductive, and other health risks. SARMs represent an interesting area of pharmaceutical research, yet their tissue-selective design has not translated into proven long-term safety for bodybuilding use.
For experienced lifters, the key question is whether the available evidence supports the claims being made about these compounds. More muscle does not automatically mean better health, and newer technology does not automatically make a substance safer.
SARMs were designed to be more selective, not to be risk-free. That distinction is worth remembering whenever the two are compared.
For those who’ve followed the SARMs discussion over the years, do you think their reputation as a safer alternative to steroids has been exaggerated? Or do you believe the research will eventually establish a meaningful advantage for some compounds?