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.
Cinnamaldehyde is an aldehyde found in cinnamon bark in high concentrations. It's used as a flavor and medicine. Cinnamon bark is usually used medicinally in doses of 1-6 grams orally. 6 grams of cinnamon can contain from to 42 to 189 mg cinnamaldehyde. Cinnamon contains approximately 1 to 3.5 percent essential oil. The essential oil is approximately 70 to 90 percent cinnamaldehyde.