I get a much much larger libido boost from mast than I do primo.Mast and Primo a very similar. Mast is a little cheaper and I feel I get better sense of well being and estrogen control than Primo. But Primo makes me strong af. I like both but if I had to choose one I'm taking Mast 👌
Mast is like proviron for me as far as an insane libido goes.