Let's say BO does what it's advertised, hopefully it would work in tandem with PC, as the study below points out. I think the triglycerides both in PC and BO produce lipase activity, which catalyzes the hydrolysis of fats.


Studies in adipose tissue showed that treatment with ethynyl estradiol and progesterone, separately or in combination, increased lipoprotein lipase activity to a comparable extent. After treatment with progesterone alone, the increase was observed in the absence of elevated levels of triglycerides in blood. Triacylglycerol lipase activity assayed at pH 7.4 (hormone- sensitive lipase) was not affected by ethynyl estradiol or progesterone alone, but a significant decrease was observed under a combined regimen. None of these hormonal treatments modified the level of monoester lipase activity.

Taken together, the results point to major hormonal influences on lipid metabolism in liver and adipose tissue. However, it cannot be assessed whether these effects are due to the direct action of ethynyl estradiol and progesterone on liver and adipose tissue lipases and/or to some other altered metabolic response (s) secondary to the intake of the steroids.
- See more at: http://press.endocrine.org/doi/abs/10.1210/endo-103-5-1647#sthash.pFgQzX1p.dpuf