Boldenone UndecylenateBenefits, Dosage & Interactions
Also known as: Equipoise, EQ
Boldenone undecylenate is an injectable anabolic-androgenic steroid developed for veterinary use, best known under the brand name Equipoise. The long undecylenate ester releases boldenone slowly, giving an elimination half-life measured in weeks and detection windows of several months. Research on Boldenone Undecylenate focuses on muscle and strength and endurance.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Animal and in-vitro studies only, no published human RCTs.
Quick answer
Boldenone undecylenate is an injectable anabolic-androgenic steroid developed for veterinary use, best known under the brand name Equipoise. The long undecylenate ester releases boldenone slowly, giving an elimination half-life measured in weeks and detection windows of several months. It has no approved human medical use in the United States, is a Schedule III controlled substance, and is prohibited in sport by WADA. Documented risks mirror other AAS: suppressed natural testosterone, adverse lipid shifts, raised hematocrit and cardiovascular strain.
- Brand name
- Equipoise (veterinary)
- Class
- Injectable anabolic-androgenic steroid (testosterone derivative)
- Ester
- Undecylenate — slow release, long-acting
- Half-life
- Roughly 14 days; detectable for months
- Legal status
- DEA Schedule III in the U.S.; no approved human use
- Sport status
- Prohibited at all times under the WADA code
Compiled by DoseRoutine from public sources including NIH/MedlinePlus, the FDA label, Mayo Clinic and PubChem. Educational information, not medical advice.
References & evidence
Documents the Boldenone Undecylenate entry is written from. Each number matches an inline marker above.
- [1]Ginseng nanoparticles mitigate boldenone-induced testicular oxidative damage and reproductive dysfunction in adult male ratsAli FAZ, Hassan H, Hamed AM, et al. · Tissue & Cell · 2026 · Peer-reviewed · PMID 41990696
- [2]Cross-talk between down-regulation of steroidogenic genes expression and oxidative and apoptotic biomarkers in testes induced by administration of tramadol and boldenone and their combination in male albino ratsMowaad NA, Asaad GF, El-Shamarka MEA, Khalil S · Iranian Journal of Basic Medical Sciences · 2022 · Peer-reviewed · PMID 36033952
How to track Boldenone Undecylenate doses
Boldenone Undecylenate is tracked as a protocol rather than a single reminder: a vial with a concentration, a schedule that may be titrated or cycled, and a rotation of injection sites. Here is the record that keeps all three consistent.
- 1
Record the vial and concentration
Log the vial strength and the volume of bacteriostatic water you added so Boldenone Undecylenate is stored as a concentration rather than a guess. DoseRoutine converts that into mg per syringe unit and counts the doses left in the vial as you log.
- 2
Set the schedule, not just a reminder
Enter the dose in mg and the frequency. Cycled protocols get a start and end date so the history stays accurate when Boldenone Undecylenate comes out of the routine.
- 3
Rotate and log the injection site
Pick the site at the moment you log the dose. The site map shows what you used last and how recently, which is the part that drifts fastest when two compounds run on different frequencies.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
Review Boldenone Undecylenate alongside your logged metrics and any relevant blood work every few weeks before changing the dose, so the change is a response to data rather than to a good or bad day.
What to log each time
- Dose in mg and the syringe units it worked out to
- Vial: reconstitution date, concentration, doses remaining
- Injection site and time
- Any side effects in the 24 h after the dose
References & Evidence
Sources on this page that document Boldenone Undecylenate dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Boldenone Undecylenate studied for?
What is Boldenone Undecylenate?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
What does the research say about Boldenone Undecylenate?
Tap a section to expand.
Source for this section: Sources for How does Boldenone Undecylenate work?: Jumps to this entry in the sources and references list at the end of the page.
Source for this section: Sources for When should you take Boldenone Undecylenate?: Jumps to this entry in the sources and references list at the end of the page.
What interacts with Boldenone Undecylenate?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any peptide + hormone | Note | Category ruleConfidence: theoretical | Injectable peptides plus hormones can have overlapping or compounding effects that aren't always well characterized.Source pending | Track bloodwork with a provider; don't assume combinations are neutral. |
Frequently asked questions about Boldenone Undecylenate
Which studies looked at Boldenone Undecylenate?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Boldenone undecylenate disrupts the immune system and induces autoimmune clinical hypothyroidism in rats: Vitamin C ameliorative effects(opens PubMed in a new tab)Int Immunopharmacol · 2021 · PMID 34224995 · https://pubmed.ncbi.nlm.nih.gov/34224995/
- 2.Boldenone Undecylenate-Mediated Hepatorenal Impairment by Oxidative Damage and Dysregulation of Heat Shock Protein 90 and Androgen Receptors Expressions: Vitamin C Preventive Role(opens PubMed in a new tab)Front Pharmacol · 2021 · PMID 33986679 · https://pubmed.ncbi.nlm.nih.gov/33986679/
- 3.A novel strategy for the detection of boldenone undecylenate misuse in cattle using ultra-high performance liquid chromatography coupled to high resolution orbitrap mass spectrometry: From non-targeted to targeted(opens PubMed in a new tab)Drug Test Anal · 2022 · PMID 34850583 · https://pubmed.ncbi.nlm.nih.gov/34850583/
- 4.Screening, confirmation and quantification of boldenone sulfate in equine urine after administration of boldenone undecylenate (Equipoise)(opens PubMed in a new tab)J Chromatogr · 1988 · PMID 3235575 · https://pubmed.ncbi.nlm.nih.gov/3235575/
- 5.Grape Seed Proanthocyanidin Ameliorates Cardiac Toxicity Induced by Boldenone Undecylenate through Inhibition of NADPH Oxidase and Reduction in the Expression of NOX2 and NOX4(opens PubMed in a new tab)Oxid Med Cell Longev · 2018 · PMID 30116498 · https://pubmed.ncbi.nlm.nih.gov/30116498/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 11954310(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/11954310
Verify at
Publisher search links for Boldenone Undecylenate. These are places to check the information — they are not citations, so they are not numbered.
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- MedlinePlus(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- FDA-approved labeling (DailyMed)(publisher search, opens in a new tab)U.S. Food and Drug Administration · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Boldenone Undecylenate?
Plain-text summary, safe to quote verbatim:
Boldenone undecylenate is an injectable anabolic-androgenic steroid developed for veterinary use, best known under the brand name Equipoise. The long undecylenate ester releases boldenone slowly, giving an elimination half-life measured in weeks and detection windows of several months. Research on Boldenone Undecylenate focuses on muscle and strength and endurance.
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Boldenone Undecylenate — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/boldenone-undecylenate
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