Pro progesterone effects...
These data suggest that cinnamaldehyde selectively induced progesterone production and inhibited production of testosterone and dehydroepiandrosterone in human adrenal cells.
https://www.sciencedirect.com/science/article/abs/pii/S0024320510001803
Also, to bypass any possible heavy metal contaminants maybe the use of cinnamon essential oil could work. Eg, 1 drop in food/drink etc.