Boldenone
Equipoise / EQ / boldenone undecylenate · Anabolic steroid (injectable)
What it is
A steroid marketed today only as a veterinary product (labeled for horses); a human formulation (Parenabol) existed historically but is long discontinued. Non-medical human use occurs in physique and performance settings.
What human evidence shows
No modern human clinical development — human "protocols" are community lore layered on veterinary pharmacology. The appetite and endurance effects users describe are anecdote, not measured outcomes.
Risks
Marked red-blood-cell increase — hematocrit can climb into thrombosis-risk territory. Long ester half-life keeps HPG-axis suppression running for months after the last injection. Anxiety is reported at higher exposures, plus the standard AAS package: lipid damage, testosterone shutdown, cardiovascular strain. No human-grade manufacturing standard applies to any current source.
Legal status
US: Schedule III anabolic steroid under the CSA. Not FDA-approved for human use; current recognized use is veterinary.
Evidence base
substantial literature
Real human evidence: randomised trial reports, or review-level evidence backed by at least one human trial report.
- phase 3/4
- 1
- randomised
- 8
- reviews
- 0
- human trials
- 9
Counts are of published papers, not distinct trials, and measure how much research exists — not whether this works or is safe for you.
Research (12)
- Androgenetic alopeciaG Ital Dermatol Venereol · 2014
- Advanced trends in detecting boldenone, its metabolites, and precursors in biological matrices: an integrative review of chromatographic methodsAnal Methods · 2024
- Boldenone and Testosterone Production from Phytosterol via One-Pot Cascade BiotransformationsJ Fungi (Basel) · 2024
- Inhibition of boldenone-induced aggression in rats by curcumin: Targeting TLR4/MyD88/TRAF-6/NF-κB pathwayJ Biochem Mol Toxicol · 2022
- A review of current chemistry, pharmacology, and regulation of endogenous anabolic steroids testosterone, boldenone, and nandrolone in horsesJ Vet Pharmacol Ther · 2023
- Presence and metabolism of the anabolic steroid boldenone in various animal species: a reviewFood Addit Contam · 2004
- Detection of boldenone in the urine of female horses-ex vivo formation versus administrationDrug Test Anal · 2024
- Differentiation of boldenone administration from ex vivo transformation in the urine of castrated male horsesDrug Test Anal · 2022
- The Behavioral and Neurochemical Changes Induced by Boldenone and/or Tramadol in Adult Male RatsNeurochem Res · 2023
- Boldenone undecylenate disrupts the immune system and induces autoimmune clinical hypothyroidism in rats: Vitamin C ameliorative effectsInt Immunopharmacol · 2021
- Bioformation of boldenone and related precursors/metabolites in equine feces and urine, with relevance to doping controlDrug Test Anal · 2020
- Boldenone Undecylenate-Mediated Hepatorenal Impairment by Oxidative Damage and Dysregulation of Heat Shock Protein 90 and Androgen Receptors Expressions: Vitamin C Preventive RoleFront Pharmacol · 2021
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