Boldenone Undecylenate

Equipoise (EQ). Very long ester. Known for endurance and lean mass.

Overview

AASTestosterone Derivative

Equipoise (EQ). Very long ester. Known for endurance and lean mass.

Effects on Markers

Significant increase in haematocrit/haemoglobin (more than most AAS), moderate lipid impact, can lower estradiol in some individuals (acts as mild AI), long detection time

Compound Guide

Ester: Undecylenate -- 11-carbon chain ester. Extremely long half-life resulting in very slow saturation (6-8 weeks to reach stable levels) and prolonged clearance.

Dosage:

  • Enhancement: 400-800 mg/week for 16-20 weeks (needs long cycles due to slow saturation)
  • No TRT application

Injection Protocol:

  • Inject 1-2x/week IM
  • 25g needle, 1-1.5 inch, glutes/VG

Key Notes:

  • Takes 6-8 weeks to fully saturate -- patience required; some front-load
  • Most notorious compound for raising haematocrit/haemoglobin -- monitor CBC regularly and donate blood if HCT exceeds 0.52
  • Can act as a mild AI: some users experience crashed E2 at high doses, especially with a low Test base
  • Run Test at equal or higher dose than EQ to avoid low-E2 symptoms
  • Very long detection time -- plan PCT well in advance (stop EQ 4-6 weeks before last Test injection)
  • Increases appetite and vascularity; milder sides than Tren or Deca

Usage History

Markers to Monitor

EstradiolHaemoglobinHaematocrit

Marker Interactions

Haematocrit

elevates · severe

Haemoglobin

elevates · significant

HDL

suppresses · moderate

Frequently Asked Questions

Related Articles

Best Cholesterol Supplements On Cycle, Ranked by Evidence (2026)

We ranked every cholesterol supplement by clinical effect size for steroid users: bergamot, fish oil, niacin, berberine, red yeast rice, and more. Exact doses, HDL vs LDL targets, and when a statin is the smarter call.

The Complete Haematology Panel for Enhanced Athletes

Go beyond haemoglobin and haematocrit. Learn to read your full CBC on cycle: red cell indices, WBC differential, platelets, and compound-specific risk profiles.

Cholesterol on Steroids: Which Compounds Destroy HDL the Most?

Oral steroids can crush HDL by 50-70% in weeks. Compound-by-compound rankings from clinical data, recovery timelines after stopping, and a tiered lipid management protocol for on-cycle use.

Liver Enzymes on Steroids: How to Read Your ALT, AST and GGT

How to interpret elevated liver enzymes on a steroid cycle. Learn the GGT trick, compound hepatotoxicity rankings, and when to worry.

Quick Reference

Category

AAS

Half-Life

14 days

Detection Time

5+ months

Usage Summary