Yeah, when cattle pellets were made, they were made stereoisomerically pure.
Today, I believe all trenbolone on market is 50:50 mixture of the two steroisomers, one of which is less active than the other one.
"In stereochemistry, stereoisomers are isomeric molecules that have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space."
Good example to show importance of this would be thalidomide.
One of them is active and one of them doesn't work at all.
