Boldenone (commonly known as Equipoise or EQ) is a long-acting injectable anabolic-androgenic steroid (AAS) derived from testosterone with a double bond between carbons 1 and 2, featuring an undecylenate ester for a slow release and half-life of about 14 days, allowing weekly injections.
$85
EQ 300 — boldenone undecylenate, known almost everywhere simply as Equipoise or EQ — is a long-acting injectable anabolic-androgenic steroid. Chemically it is the C17β undecylenate ester of boldenone, and boldenone itself is the C1(2) dehydrogenated analogue of testosterone. In plain terms: it is testosterone with one extra double bond, and that single structural change is responsible for almost everything that makes EQ behave differently from a test base.
This listing is boldenone undecylenate 300 mg per mL in a 10 mL vial. It has an unusual history for a compound this widely used: it was introduced for human clinical use in the 1960s under the brand name Parenabol, then discontinued for human use in the late 1970s. Today it remains marketed for veterinary use in the United States and Australia, and it is a DEA Schedule III controlled substance. It is not approved by the FDA for human use. We would rather state that plainly than let you find it out somewhere else.
Boldenone produces strong anabolic effects with moderate androgenic effects and only weak estrogenic activity. It carries no 17α-alkyl group, which means — unlike an oral such as Dianabol or Anadrol — it does not carry the hepatic burden that alkylated compounds do.
When injected, the undecylenate ester forms a depot in the muscle from which boldenone undecylenate is released slowly and then converted to active boldenone. That depot behaviour is the entire story of this compound, and it is where most people get EQ wrong.
Boldenone undecylenate has an elimination half-life of approximately 14 days by intramuscular injection. That is one of the longest of any commonly used compound, and it has three consequences that most product pages never mention.
First, it takes a long time to reach steady state. With a 14-day half-life, blood levels are still climbing well over a month into use. Anyone judging EQ after six or eight weeks is judging a compound that has not finished arriving.
Second, short runs are largely wasted. EQ is conventionally run for extended periods precisely because of this. If your plan is a short cycle, boldenone is the wrong tool — a shorter-ester compound will give you a usable curve in the time available.
Third, it clears slowly. The same ester that takes weeks to build takes weeks to leave. This matters for planning recovery, and it matters a great deal if you are ever subject to testing.
EQ is widely described as a “dry” compound, and relative to testosterone that is fair — its estrogenic activity is weak and water retention is typically modest. But weak is not zero. Boldenone does aromatise, and over a long run at a meaningful dose, estrogenic effects can accumulate quietly.
The practical error runs in both directions. Some people run EQ with no estrogen management at all and are surprised by gradual water and nipple sensitivity late in a cycle. Others pre-emptively crush estrogen with an aromatase inhibitor and end up with flat joints, poor lipids and no libido — which are low-estrogen symptoms, not EQ symptoms. An aromatase inhibitor such as Arimidex or Aromasin should be used in response to bloodwork and symptoms, not on a schedule.
Boldenone is strongly associated with increased red blood cell production, and this is the single most useful thing to monitor while using it. Elevated haematocrit thickens the blood, and it is one of the few genuinely serious and genuinely measurable risks attached to this compound.
A complete blood count before, during and after use costs very little. Headaches, unusual flushing, and disproportionate breathlessness during cardio are the practical warning signs. Adequate hydration and regular cardiovascular work help; donating blood is the conventional response to a persistently high reading, and that is a conversation for a physician rather than a product page.
The reported side effect profile of boldenone is generally milder than that of the 19-nor compounds, but it is not benign:
These three get compared constantly because they occupy similar roles — long-ester, lean-gaining, added to a testosterone base:
Because boldenone suppresses endogenous testosterone, a recovery protocol is standard practice. The relevant point specific to EQ is timing: with a 14-day half-life, meaningful levels persist for weeks after the last injection, so post-cycle therapy is started considerably later than it would be after a short-ester compound. Starting too early simply means running a recovery protocol against a still-suppressive blood level.
Commonly used recovery compounds include Nolvadex (tamoxifen), Clomid, enclomiphene and HCG. Blood pressure, a full lipid panel and a complete blood count before and after a run are the baseline anyone using this compound should have.
KGEAR U.S ships boldenone undecylenate 300 mg/mL domestically within the United States, typically arriving in 3–5 business days. Orders are placed directly through this page, payment is by Bitcoin, and orders need at least 2 items and a $100 subtotal. If you have not used crypto before, our guide to buying Bitcoin walks through it step by step.
You can browse the rest of our injectables range — including Test E, Test P, NPP, Tren A and Masteron — or the ancillaries that pair with a long run.
What is EQ 300 used for?
Boldenone undecylenate is used in performance contexts for steady lean mass accumulation over long runs, generally alongside a testosterone base. It is a veterinary-approved compound with no current human medical approval in the US.
How long does EQ stay in your system?
The elimination half-life is approximately 14 days. Practically, that means meaningful blood levels for weeks after the final injection, and a correspondingly long clearance period.
How often is boldenone undecylenate injected?
The long undecylenate ester means frequent injection is unnecessary; weekly administration is the conventional approach discussed in the literature. Specific protocols are a decision for you and a physician.
Does EQ cause water retention?
Far less than testosterone. Boldenone has only weak estrogenic activity, so it is usually described as a drier compound — but it does aromatise, and estrogen can still creep up over a long run.
Does EQ need an aromatase inhibitor?
Not automatically. Because its estrogenic activity is weak, many users need less than they expect. The sensible approach is to respond to bloodwork and symptoms rather than run an AI by default.
Is boldenone the same as Deca?
No. Both are long-ester lean-mass compounds, but nandrolone is progestogenic and boldenone is not — which is why the prolactin-related issues associated with Deca do not apply here.
Does EQ really increase appetite?
Increased appetite is one of the most consistently reported effects of boldenone, which is part of why it was developed for veterinary use.
What is the price of EQ 300 and how do I order?
Pricing is shown at the top of this page. Orders are placed on-site, paid by Bitcoin, with a 2-item and $100 minimum, and US domestic shipping in 3–5 business days.
Disclaimer: This information is provided for educational purposes only and is not medical advice. Boldenone undecylenate is a DEA Schedule III controlled substance and is not approved by the FDA for human use. Anabolic-androgenic steroids carry real risks, including cardiovascular, hormonal and psychological effects. Nothing on this page should be taken as encouragement to use this product, and no statement here has been evaluated by the FDA. Consult a qualified physician before making any decision about your health.
This product is intended for research or educational purposes only and is not approved for human use unless prescribed by a licensed healthcare professional. Always consult a medical expert before beginning any supplement or hormone program.
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