Boldenone undecylenate is a very versatile drug, and can be combined with a number of other agents depending on the desired result. For mass, it is commonly stacked with an injectable testosterone such as enanthate or cypionate. This should produce strong gains in muscle size and strength, without the same intensity of side effects of using testosterone (at a higher dose) alone. During a cutting phase, muscle hardness and density can be greatly improved when combining boldenone undecylenate with a non-aromatizable steroid such as trenbolone acetate or methenolone enanthate. Oral c-17 alpha alkylated agents such as fluoxymesterone or stanozolol may also be used, but will present some level of hepatotoxicity. For some, even the low buildup of estrogen associated with this compound is enough to relegate its use to bulking cycles only.
In table 1 you are able to see what kind of kind of steroid it is. They are 19nor-androgenics by which the double ties in the A-ring are moved to the B-ring. They are also diols. In the first phase of the precursor era, they where called 19nor-5-andro-diols. The analogues with the most marked anabolic effects were IIId (the 17-alfa-ethyl-analogue) and IIIe (the 17-alfa-methyl-analogue). Analogue IIIe is methandriol. The diols are probable more asset than the 3-ones, because the double bond by the 3-ones moves faster to the A-ring.
That also happened with the 1,5-dehydro-anabolics with which Schering performed tests in the sixties. In these tests of the researchers of Syntex, Methandriol (IIIe) is seven times more powerful than methyltestosterone. Analogous IIId is a bit less potent.