Epiandrosterone
Mechanism of Action +
### Introduction to DHEA and Epiandrosterone Based on the provided documentation, Epiandrosterone is a naturally occurring metabolite of Dehydroepiandrosterone (DHEA). DHEA is a 19-carbon steroid naturally produced in the body by the adrenal glands through the conversion of cholesterol. It functions as a critical metabolic precursor for the production of downstream hormones, including testosterone, dihydrotestosterone (DHT), and estrogens such as estrone and 17-beta-estradiol. DHEA is the second most abundant circulating steroid in humans. Upon secretion, DHEA is subjected to extensive metabolism, forming a multitude of metabolites. Among these primary metabolites are androsterone, epiandrosterone, and etiocholanolone. Epiandrosterone (EA) acts as a base molecule where the dehydro (DH) group can be positioned in various locations to create different isomers.
### Enzymatic Conversions and Pathways The metabolism of DHEA and its derivatives involves several specific enzymatic pathways. DHEA can be converted into 7a-hydroxyDHEA via the enzyme Oxysterol 7a-hydroxylase. The cytochrome P450 enzyme CYP3A4/5 has also been implicated in this specific conversion. Once formed, 7a-hydroxyDHEA can be further converted into a beta form (7b-hydroxyDHEA) via the enzyme 11b-HSD type 1.
These conversions into 7a and 7b oxygenated metabolites are not restricted to steroidogenic tissues like the testes or ovaries, nor are they limited to the adrenal glands. This metabolism can occur across a wide variety of tissues, including the brain, spleen, thymus, perianal skin, ventral skin, intestine, colon, coecum, and muscle tissues. Both the 7a and 7b hydroxy DHEA metabolites can be further converted into 7-Oxo DHEA (commonly known as 7-Keto) via the same 11b-HSD enzymes. Additionally, DHEA can be metabolized into derivatives via CYP7B1, a process that is irreversible. The 7a and 7b conjugates can convert to and from each other, utilizing 7-Oxo as an intermediate. These specific metabolic pathways are noted to be involved with the immunological, inflammatory, and neurological aspects of DHEA supplementation.
### Isomeric Variations and Aromatase Activity The provided data highlights several isomers of DHEA that share structural similarities but exhibit different metabolic behaviors, particularly regarding aromatase activity and estrogenic conversion:
1. **5-DHEA**: The most commonly sold isomeric form of DHEA. It is noted that 5-DHEA is often highly active in tissues. 2. **4-DHEA**: An isomer of 5-DHEA differing by the position of the double bond. While metabolized similarly to 5-DHEA, the repositioning of the double bond makes it less active as a substrate for the aromatase enzyme, thereby decreasing the formation of estrogenic metabolites. 3. **1-DHEA**: Dehydrogenated between C1 and C2 (double bond at the first position), leading to metabolism into 1-ene isomers. Crucially, 1-ene dehydrogenated steroids show no substrate activity for aromatase, meaning 1-DHEA is not estrogenic. Furthermore, 1-ene variants act as enzymatic inhibitors for 5-alpha-reductase, which reduces the androgenicity of the compound. 4. **19-Nor-DHEA**: A demethylated derivative of DHEA where carbon-19 has been removed. 19-Nor steroids show nearly zero estrogenicity and very low substrate activity for aromatization. They are capable of binding directly to the androgen receptor. The enzyme 5-alpha-reductase metabolizes this compound into dehydro-nandrolone derivatives, which exhibit anti-androgenic effects.
### Pharmacokinetics Insufficient data provided in the sources regarding specific pharmacokinetic parameters (Tmax, bioavailability, half-life) for Epiandrosterone.
What is Epiandrosterone? +
Is Epiandrosterone legal? +
What is the typical dose of Epiandrosterone? +
Does Epiandrosterone convert to estrogen? +
How does 1-DHEA differ from standard DHEA? +
What is the Designer Steroid Control Act of 2014 (DSCA)? +
What enzymes metabolize DHEA? +
Who discovered DHEA? +
What are the side effects of Epiandrosterone? +
How long does it take for Epiandrosterone to work? +
Should I cycle Epiandrosterone? +
Can women take Epiandrosterone? +
What is 19-Nor-DHEA? +
What is 7-Keto DHEA? +
Are there food sources of Epiandrosterone? +
Everything About Epiandrosterone Article
## What It Is Epiandrosterone is a naturally occurring steroid hormone and a direct metabolite of Dehydroepiandrosterone (DHEA). DHEA is a 19-carbon steroid produced naturally in the human body by the adrenal glands through the conversion of cholesterol. As the second most abundant circulating steroid in humans, DHEA serves as a vital metabolic precursor for the production of other hormones, including testosterone, dihydrotestosterone (DHT), and estrogens. Upon secretion, DHEA undergoes extensive metabolism, breaking down into several primary metabolites, including androsterone, etiocholanolone, and epiandrosterone.
Epiandrosterone is often categorized within the sports nutrition industry alongside other DHEA isomers and derivatives, such as 1-DHEA, 4-DHEA, and 19-Nor-DHEA. These compounds are utilized for their varying interactions with steroidogenic enzymes, allowing users to target specific physiological pathways.
## Legal and Regulatory Status The regulatory status of Epiandrosterone and related DHEA metabolites is heavily tied to the Dietary Supplement Health and Education Act of 1994 (DSHEA) and the Designer Steroid Control Act of 2014 (DSCA). According to a 2015 legal opinion provided to Hi-Tech Pharmaceuticals, DHEA and its naturally occurring metabolites qualify as dietary supplements under DSHEA because they are produced naturally by the adrenal glands and were marketed prior to 1994 (making DHEA an "Old Dietary Ingredient").
Furthermore, the DSCA, which placed restrictions on substances substantially similar to anabolic steroids, specifically exempted DHEA. The legal argument posits that because Epiandrosterone is a naturally occurring metabolite of DHEA, it falls under this exemption and is therefore a lawful, uncontrolled dietary supplement, provided it is not marketed for the diagnosis, cure, mitigation, treatment, or prevention of disease.
## The Science: Metabolism and Enzymes The metabolism of DHEA into its various downstream compounds is complex and involves several key enzymes: * **Oxysterol 7a-hydroxylase & CYP3A4/5:** These enzymes convert DHEA into 7a-hydroxyDHEA. * **11b-HSD type 1:** This enzyme converts 7a-hydroxyDHEA into 7b-hydroxyDHEA. Both 7a and 7b forms can be further converted into 7-Oxo DHEA (7-Keto). * **CYP7B1:** An enzyme responsible for irreversible DHEA metabolism.
Interestingly, these conversions are not limited to the testes, ovaries, or adrenal glands. They occur in a wide array of tissues, including the brain, spleen, thymus, skin, intestine, and muscle tissues. These specific metabolites are heavily involved in the immunological, inflammatory, and neurological aspects of DHEA supplementation.
## DHEA Isomers Compared While Epiandrosterone is a specific metabolite, it is closely related to several DHEA isomers that have been modified to alter their interaction with enzymes like aromatase and 5-alpha-reductase: * **1-DHEA:** Features a double bond at the first position. It shows no substrate activity for aromatase (meaning it does not convert to estrogen) and acts as an inhibitor for 5-alpha-reductase, reducing androgenicity. * **4-DHEA:** An isomer of 5-DHEA with a repositioned double bond, making it less active as a substrate for aromatase, thereby decreasing estrogenic metabolites. * **19-Nor-DHEA:** A demethylated derivative missing carbon-19. It shows nearly zero estrogenicity, binds directly to the androgen receptor, and is metabolized into anti-androgenic dehydro-nandrolone derivatives.
## What The Research Says Currently, there is insufficient clinical data provided in the available sources to establish the efficacy, safety, or specific physiological outcomes of Epiandrosterone supplementation in humans. The available documentation focuses primarily on its biochemical classification as a DHEA metabolite and its legal status under US dietary supplement law.
## Dosing Guide Based on a survey of 11 products in the current supplement catalog, Epiandrosterone is dosed across a wide range: * **Minimum Observed Dose:** 25mg * **Median Dose:** 100mg * **Mean Dose:** 128.1mg * **Maximum Observed Dose:** 400mg
*Note: Because clinical trials are not provided in the source data, these figures represent market averages rather than clinically validated efficacy thresholds.*
## When & How To Take It Insufficient data provided in the sources regarding optimal timing, cycling, or administration protocols.
## Who Should Take It Insufficient data provided in the sources to recommend specific populations for supplementation.
## Who Should NOT Take It Insufficient data provided in the sources regarding contraindications. However, as a hormone precursor, individuals with hormone-sensitive conditions should consult a physician.
## The Bottom Line Epiandrosterone is a naturally occurring metabolite of DHEA. While it is widely available in the sports nutrition market with doses typically ranging from 100mg to 400mg, clinical data regarding its specific effects on muscle growth, strength, or recovery is not provided in the current source material. Its primary distinction lies in its legal classification as a DHEA derivative, exempting it from certain anabolic steroid control laws.