Equipoise (boldenone undecylenate) is historically a veterinary steroid but for some time has been available as an UGL human preparation as well.
In the past, the principal reason for Equipoise’s use was it’s easy availability as a Mexican veterinary product. Presently, for the most part there is little specific reason to use Equipoise in an anabolic steroid cycle. There is nothing that it does anabolically that Masteron, Primobolan, Deca, or trenbolone will not do. In terms of side effects, likewise it has no advantage over Masteron or Primobolan, unless one desires the occasional side effect of increased appetite, or the side effect of its moderate conversion to estrogen. This can be useful if no other aromatizing steroid is being used.
Effectiveness of Equipoise
This is not intended to disparage the compound: it certainly can be put to good use in a steroid cycle. Its potency (effect per milligram) is comparable to most other injectable steroids, though less than that of trenbolone, and so for example addition of 400 mg/week is a substantial boost to most cycles. Alternately, if substituting boldenone for another injectable this can be done on a milligram-for-milligram basis.
Half-Life of Equipoise
A serious drawback of Equipoise is its long half-life, which is probably at least 12 days. This results in an extended period of time after the last injection during which levels are neither sufficiently high for optimal anabolism, nor low enough to allow recovery to occur. A solution for this problem is to use Equipoise in only the earlier part of a cycle.