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Prohormones have occupied a strange place in the bodybuilding supplement market for decades.
The original wave of prohormones became especially popular in the early 2000s, before regulatory changes removed many products from the U.S. market. Today, the term “prohormone” is used to describe a much broader collection of androgen precursors, DHEA-derived compounds, and other products marketed for muscle growth, strength, or testosterone support.
That creates a problem for shoppers.
A product labeled a “prohormone” isn’t automatically a steroid, a dietary supplement, or a legally approved performance enhancer. Its actual chemical identity and regulatory status matter.
This guide compares several companies currently selling prohormone or prohormone-style products, while also explaining what these products are, how the category has changed, and what to look for when evaluating a supplier.
Key Takeaways
- “Prohormone” is not a precise safety or legal classification. Different companies use the term for different types of androgenic compounds.
- The original early-2000s prohormone market changed substantially after U.S. legislation targeting designer anabolic steroids.
- Some newer products are marketed as DHEA-derived or androgen precursors, while other products sold under the prohormone label may have substantially different pharmacology
- Hi-Tech Pharmaceuticals currently has one of the largest prohormone-focused catalogs, although individual products and their regulatory status should be evaluated separately.
- Supplier quality should be evaluated independently from product legality or safety. Testing, labeling, manufacturing information, and transparent business practices all matter.
Prohormone Companies Compared
| Company | Main Focus | Product Range | Testing / Documentation | Main Strength |
|---|---|---|---|---|
| Hi-Tech Pharmaceuticals | Prohormone-style supplements and bodybuilding products | Very broad | Product-specific information available | Largest established selection |
| Pure Rawz | Research compounds and prohormones | Broad | COAs/testing available for some products | Variety |
| Behemoth Labz | Research compounds and prohormone-style products | Broad | Product-specific documentation varies | Unusual compound selection |
| MySupplementStore | Reseller / bodybuilding products | Broad, multi-brand | Depends on manufacturer | Wide selection |
| Amino Asylum | Closed | — | — | Former vendor; no longer active |
This isn’t a ranking of which products are safest or most effective. It is a comparison of currently identifiable suppliers and their approach to the category.
1. Hi-Tech Pharmaceuticals: Best Overall Selection
Hi-Tech Pharmaceuticals is the strongest fit for this list if the primary criterion is prohormone product selection.
The company currently maintains a large testosterone/prohormone section spanning multiple brands and product types. Its current catalog includes products marketed around compounds such as 1-Andro and 4-Andro, as well as products carrying names associated with traditional anabolic steroids.
The company also describes its proprietary Cyclosome delivery technology as part of its approach to delivering certain hormonal and prohormone ingredients.
That extensive catalog is the company’s biggest advantage.
It is also the reason product-by-product evaluation matters.
Hi-Tech Pharmaceuticals Overview
Product range: Large selection of prohormone-style, testosterone-support, muscle-building, and bodybuilding products
Examples: 1-Andro, 4-Andro, Halodrol, Deca-Durabolin-style products, Equipoise-style products, and other formulations
Main strength: Extensive selection and long history in the category
Main drawback: Product names and “legal prohormone” terminology can make it difficult to distinguish supplements from androgenic compounds without examining the actual ingredients
The company currently describes several of these products as prohormones or testosterone-support formulations on its own site.
2. Pure Rawz: Best for Overall Variety
Pure Rawz is less narrowly focused than Hi-Tech.
Its broader catalog includes prohormones, SARMs, peptides, nootropics, aromatase inhibitors, PCT products, and other research-oriented compounds.
That makes it particularly relevant to consumers looking for multiple product categories from one supplier.
The trade-off is that a broad catalog can make it harder to evaluate individual products consistently.
Pure Rawz Overview
Product range: Prohormones, SARMs, peptides, nootropics, PCT and related products
Main strength: Broad catalog
Main drawback: Less specialized than a dedicated prohormone manufacturer
Because Pure Rawz operates across several research-chemical categories, the specific documentation and regulatory considerations can differ substantially from one product to another.
3. Behemoth Labz: Best for Unusual Compounds
Behemoth Labz has historically offered a mix of SARMs, peptides, amino acids, and prohormone-style products.
Its catalog has included compounds such as 1-Andro, 4-Andro, 19-Nor-Andro products, MENT, Epistane, Halodrol, and M-Sten.
That makes it particularly notable for people researching compounds that aren’t commonly found in conventional supplement stores.
However, the presence of a compound in a catalog shouldn’t be interpreted as an endorsement of its safety or legality.
Behemoth Labz Overview
Product range: Prohormone-style compounds, SARMs, peptides and other research products
Main strength: Unusual and broad compound selection
Main drawback: Some products occupy a much higher-risk end of the androgenic spectrum
4. MySupplementStore: Best for Multi-Brand Selection
MySupplementStore takes a different approach.
Rather than relying primarily on its own formulations, the company historically operated as a multi-brand retailer, offering products from several manufacturers.
The original article specifically highlighted its broad supplier selection and inclusion of conventional bodybuilding supplements alongside prohormone products.
That can be useful for shoppers who want to compare different manufacturers in one storefront.
The downside is that product quality, ingredients, and testing can vary between brands.
Amino Asylum: Formerly Ranked, Now Closed
Amino Asylum Is No Longer an Active Vendor
Amino Asylum was previously ranked as the leading prohormone company in this article.
That recommendation is no longer current.
Amino Asylum went offline around June 2025 following a reported federal enforcement action at its warehouse, and its original storefront has not returned. Current industry reporting continues to identify the company as closed.
Because the company is no longer operating normally, Amino Asylum has been removed from the active rankings.
This is also a useful reminder about researching online bodybuilding suppliers: a vendor can have a strong reputation and extensive customer history and still become unavailable.
Anyone encountering a new website claiming to be an authorized Amino Asylum successor should exercise caution and independently verify the company’s identity before providing personal or payment information.
What Are Prohormones?
The term prohormone originally referred to a compound that can be converted by the body into another biologically active hormone.
In bodybuilding, however, the term has become much broader.
Some products marketed as prohormones are androgen precursors, while others are synthetic compounds designed to produce anabolic effects.
This makes chemical identity particularly important.
The original article describes newer products as compounds that increase endogenous androgen production rather than directly introducing a hormone.
That description doesn’t apply universally.
Some compounds sold under the prohormone label can have direct androgenic or steroid-like activity.
Prohormones vs. Anabolic Steroids
The distinction between a prohormone and an anabolic steroid depends on the specific compound.
A precursor may undergo enzymatic conversion into an active hormone.
A steroid may already be biologically active.
But from a practical perspective, the distinction doesn’t tell you whether a product is harmless.
A compound can still produce substantial hormonal effects even if it is marketed as a “precursor.”
Are Prohormones Legal?
This is one of the areas where older prohormone content is particularly misleading.
The legal status of a product depends on:
- Its exact chemical structure
- How it is classified under applicable law
- How it is marketed
- Whether it is included in controlled-substance legislation
- Whether it qualifies as a lawful dietary ingredient
- The country where it is sold or imported
The original article states that “current prohormones” are generally legal.
That is too broad for a current 2026 guide.
A product being sold online doesn’t establish that it meets the legal requirements for sale as a dietary supplement.
The FDA has specifically warned that bodybuilding products marketed as dietary supplements may illegally contain anabolic steroids or steroid-like substances.
Are Prohormones Dietary Supplements?
Some products marketed as prohormones are sold in the dietary-supplement market.
That doesn’t mean every compound marketed using the term qualifies as a lawful dietary ingredient.
This is especially important for products with strong androgenic or anabolic effects.
The FDA does not pre-approve dietary supplements for safety and effectiveness before they enter the market, and products containing undeclared drug ingredients can create significant health risks.
Prohormone Benefits
Depending on the compound, prohormone products may be marketed around:
- Increased lean mass
- Increased strength
- Improved training performance
- Increased androgen activity
- Changes in body composition
However, these claims shouldn’t be treated as interchangeable.
Some ingredients have substantially more evidence than others, and a manufacturer’s marketing claims are not equivalent to clinical evidence.
Prohormone Side Effects
Potential adverse effects vary significantly depending on the compound.
Possible concerns include:
Hormonal Suppression
Androgenic compounds can interfere with the body’s normal hormone production.
Liver Effects
Some oral androgenic products can cause significant liver stress or injury.
The FDA has documented serious liver injuries associated with steroid-containing bodybuilding products.
Cholesterol Changes
Anabolic and androgenic compounds can negatively affect lipid profiles, potentially increasing cardiovascular risk.
Acne and Hair Loss
Increased androgen activity can stimulate acne and accelerate hair loss in genetically susceptible individuals.
Fertility Problems
Exogenous androgenic exposure can interfere with sperm production and reproductive function.
Cardiovascular Risks
Potential concerns include elevated blood pressure, adverse lipid changes, heart attack, stroke, and blood clots.
What Is the “Safest” Prohormone?
There isn’t a scientifically defensible answer to that question.
The original article suggests that non-methylated products are safer than methylated prohormones.
There is some logic behind the distinction because certain methylated oral compounds present greater hepatic concerns.
But non-methylated does not mean safe.
A product can avoid one particular risk while still producing substantial hormonal, cardiovascular, reproductive, or androgenic effects.
A better question is:
What is the exact compound, what evidence exists for it, and what risks are documented?
What Is the Most Anabolic Prohormone?
There is no reliable universal ranking.
“Anabolic” can refer to effects on muscle protein synthesis, nitrogen retention, strength, lean mass, or other physiological measures.
Different compounds can produce different effects, while individual response varies considerably.
Rather than identifying a single “strongest” prohormone, it is more useful to examine the compound’s mechanism, evidence, potency, and adverse-effect profile.
Prohormones for Lean Muscle
Prohormones are generally marketed toward people looking to increase lean mass and strength.
However, muscle growth depends on many variables, including:
- Resistance training
- Protein intake
- Calorie intake
- Sleep
- Genetics
- Hormonal status
A product’s anabolic marketing claims shouldn’t be interpreted as guaranteeing a particular amount of muscle gain.
Prohormones for Fat Loss
There is no prohormone that should be considered a primary fat-loss treatment.
Body-fat reduction remains primarily dependent on sustained energy balance.
Some androgenic compounds may help preserve lean mass while dieting, but that isn’t the same thing as directly causing fat loss.
How to Evaluate a Prohormone Company
1. Check the Actual Ingredient
Don’t rely exclusively on the product name.
Look at the full ingredient label and determine exactly what compound is being supplied.
2. Look for Independent Testing
Where available, look for current third-party analytical testing.
A useful report should identify the material being tested and provide enough information to connect the result to the product or batch.
3. Examine the Company’s Claims
Be skeptical of language such as:
- “100% safe”
- “No side effects”
- “Natural steroids”
- “Completely legal”
- “Guaranteed muscle growth”
Strong claims require strong evidence.
4. Check Business Continuity
A supplier with an established history can still disappear.
The closure of Amino Asylum is an example of why current vendor status matters when maintaining a comparison list.
5. Check Current Regulations
Don’t assume something is legal because another website sells it.
The exact compound and your jurisdiction matter.
The Bottom Line
Prohormones can have meaningful anabolic effects, but the category is too broad to label any product universally safe, legal, or superior to anabolic steroids.
- Hi-Tech Pharmaceuticals stands out for its broad selection of prohormone-style and testosterone-support products.
- Pure Rawz, Behemoth Labz, and other research-oriented suppliers offer additional options, but product quality, ingredients, and regulatory status should be evaluated individually.
- Amino Asylum has been removed from the rankings following its closure and should no longer be considered an active prohormone supplier.
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