Welcome to Boss Peptides

We are a professional online supplier of SARMs & peptides. Our product batches are lab-tested using HPLC analysis performed by a third party lab here in the United States. Our production facility is clean and professional and we use top of the line equipment and materials to produce our products. Most importantly, our prices are competitive and affordable.

Our SARMs and peptides are suspended in lab-grade solutions. Our solutions consist of PEG-400 (polyethylene glycol 400) mixed with lab-grade ethanol. The PEG-400 ethanol suspending solution is mixed at 80% and 20% respectively.

The quality of our products is what our online store is known for. Our products are backed by a 30-day refund guarantee as well as free USPS Priority same-day shipping on orders over $99.

Unlike other online vendors of SARMs, we use independent US labs to confirm our purity assays. Every COA will come with the contract lab name and information at the top portion of the printout.

Affordable Pricing

We understand that SARMs can be expensive especially when ordering multiple products. Our products are priced competitively to make our products affordable to all customers. Free same-day USPS shipping is supplied to all customers on orders over $99.99 (or two bottles).


The word “SARMs” is an abbreviation of the word Selective Androgen Receptor Modulators. SARMs act as full agonists at the androgen receptor within the body. As the name suggests, these compounds have a selective nature in which they target the androgen receptors. Ones developed and researched have highly-targetted anabolic properties, meaning they mostly influence lean muscle and bone tissues without influencing other tissues susceptible to androgenic effects.

The heart and prostate are two such tissues that are susceptible to androgen release. Steroids do not have high selectivity for lean muscle tissue and can negatively affect the heart as well as cause non-life threatening side effects such as hypogonadism (man breasts), hair loss, lowered sex drive and acne.

The medical and pharmaceutical industries are interested in SARMs due to the selective qualities that these substances carry. Testosterone Replacement Therapy (TRT) in older men might be replaced with more targeted substances that may not convert to dihydrotestosterone, cause balding, reduce natural testosterone production, damage the heart and enlarge the prostate. Similarly, current and future SARMs may replace synthetic testosterone-based steroid drugs to treat endocrine diseases and muscle wasting syndromes. Certain types of rare cancers might also be treated with these compounds in the future. Due to a very long approval process by government regulators, research can take millions of dollars and decades to approve a compound as a new treatment. Several drugs in the SARM class have already been through human efficacy and safety testing.

Several substances in the class show direct and indirect influence on other hormonal compounds. Two such hormones include growth hormone (GH) and insulin-like-growth factor 1 (IGF-1). GH and IGF-1 are both anabolics when released from the brain. Growth hormone can also help with joint and bone repair. Some modulators in the class show strictly anabolic properties while others show potential as fat burners in studies by increasing metabolic resting rates.

  • Lean muscle mass repair and growth
  • Strength and endurance increases
  • Potential fat loss and metabolic increase
  • Increased appetite and sex drive
  • Lower risk of conversion to dihydrotestosterone
  • Less chance of androgenic side effects than steroids
  • Low or no conversion to dihydrotestosterone reducing side effects like balding
  • Less effect on natural hormone and lipid levels after treatment
  • Lower risk to essential organs such as the heart and prostate
  • Orally active with a lower risk to liver health than traditional steroids
  • Fewer emasculation side effects during treatment – potentially more suitable for females

Unique pharmacological profiles of substances in the SARM class mean they have a different range of effects and androgenic binding ratios. Most of the non-steroidal SARMs created and researched have high anabolic versus androgenic ratios ranging from 1 to 3 all the way up to 1 to 90. Natural testosterone comparatively has a ratio of 1 to 1.

SARMs show promising in several areas in which they have been studied. Research shows they can increase lean muscle mass and repair in a similar manner to anabolic steroids. Several compounds have also shown promising results at decreasing fat storage and improving fat loss by benefiting metabolic rate. Other visceral benefits are shown such as bone and joint strengthening and repair. Compared to anabolic steroids, hormones do not seem to be affected to the same degree. Post cycle these substances show promising hormonal recovery with a lower chance of producing negative side effects as a whole. SARMs might be more attractive to woman users due to minimal masculising side effects. The class does not seem to burden the liver to the same degree due to their enzymatic elimination pathways.

Another benefit SARMs may have over steroids is their effects on important hormones and lipids after discontinuation. Steroids cause a reduction of important sex hormones such as free-testosterone for weeks or months after cessation. Without post cycle drug intervention, side effects from steroids can cause muscle catabolism, feminization affecting the physical appearance and other more serious side effects. Drugs used to treat post-cycle hormonal deficits come with their own risk of side effects. Due to higher anabolic targeting, SARMs might decrease the need for post-cycle intervention when used at therapeutic dosages. In the case of higher dosages, post cycle intervention may still be needed, however, the dosage and time of treatment may be less severe than with steroidal drugs.1

SARMs don’t affect the androgenic system outside of the bone and lean muscle tissues to the same degree as steroids or natural testosterone. With steroids, androgens in other tissues and organs can be affected causing long-term health risks. This risk is theoretically reduced with the best SARMsx.com.

Cosmetic side effects are also less likely than with steroids due to how this class affects the androgen system. This drug class appears to have a lower chance of causing natural hormonal and lipid disruption post-treatment. More research needs to be invested when understanding the side effects of this class. Hopefully, continued human study will help the medical community to understand more about these unique molecules in the future.

Since the androgenic system is so vast, rare and serious side effects are entirely possible. An allergic reaction is likely a rare phenomenon however its risks cannot be ruled out. Several SARMs have human study however small sample sizes limit data on side effects.

More research needs to be invested to determine the full risks on rare and serious side effects. In theory, SARMs should carry a much lower risk of serious side effects than their anabolic steroid counterparts.

Potentially serious side-effects
In addition to potentially common side effects, these extremely rare side effects are listed by the FDA as potential dangers in the case of human consumption. You can read the FDA warning here.

  • Potential liver toxicity
  • Potential risk to increase heart-attack
  • Potential to increase risk of stroke

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